diff --git a/node/AES.cpp b/node/AES.cpp
index 1ba6aeeb..6bc30883 100644
--- a/node/AES.cpp
+++ b/node/AES.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "AES.hpp"
 
diff --git a/node/AES.hpp b/node/AES.hpp
index 0e61efe4..23091521 100644
--- a/node/AES.hpp
+++ b/node/AES.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_AES_HPP
 #define ZT_AES_HPP
diff --git a/node/AES_aesni.cpp b/node/AES_aesni.cpp
index e4509425..1eecbfae 100644
--- a/node/AES_aesni.cpp
+++ b/node/AES_aesni.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "AES.hpp"
 #include "Constants.hpp"
diff --git a/node/AES_armcrypto.cpp b/node/AES_armcrypto.cpp
index a1be0b00..8e1cce30 100644
--- a/node/AES_armcrypto.cpp
+++ b/node/AES_armcrypto.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "AES.hpp"
 #include "Constants.hpp"
diff --git a/node/Address.hpp b/node/Address.hpp
index dfce7acb..6c376747 100644
--- a/node/Address.hpp
+++ b/node/Address.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_ADDRESS_HPP
 #define ZT_ADDRESS_HPP
diff --git a/node/AtomicCounter.hpp b/node/AtomicCounter.hpp
index 5ca8cc9c..b70b3dd9 100644
--- a/node/AtomicCounter.hpp
+++ b/node/AtomicCounter.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_ATOMICCOUNTER_HPP
 #define ZT_ATOMICCOUNTER_HPP
diff --git a/node/Bond.cpp b/node/Bond.cpp
index f612cea2..8f913046 100644
--- a/node/Bond.cpp
+++ b/node/Bond.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2021 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Bond.hpp"
 
diff --git a/node/Bond.hpp b/node/Bond.hpp
index 2edbe869..5c7396d2 100644
--- a/node/Bond.hpp
+++ b/node/Bond.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2021 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_BOND_HPP
 #define ZT_BOND_HPP
diff --git a/node/Buffer.hpp b/node/Buffer.hpp
index 0c76875e..2cb6b542 100644
--- a/node/Buffer.hpp
+++ b/node/Buffer.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_BUFFER_HPP
 #define ZT_BUFFER_HPP
diff --git a/node/Capability.cpp b/node/Capability.cpp
index b7ee3f9f..7929df21 100644
--- a/node/Capability.cpp
+++ b/node/Capability.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Capability.hpp"
 
diff --git a/node/Capability.hpp b/node/Capability.hpp
index ac4d43b6..e1541e80 100644
--- a/node/Capability.hpp
+++ b/node/Capability.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_CAPABILITY_HPP
 #define ZT_CAPABILITY_HPP
diff --git a/node/CertificateOfMembership.cpp b/node/CertificateOfMembership.cpp
index 5a00c8ea..60e15397 100644
--- a/node/CertificateOfMembership.cpp
+++ b/node/CertificateOfMembership.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "CertificateOfMembership.hpp"
 
diff --git a/node/CertificateOfMembership.hpp b/node/CertificateOfMembership.hpp
index c5a3c6a7..25187a08 100644
--- a/node/CertificateOfMembership.hpp
+++ b/node/CertificateOfMembership.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_CERTIFICATEOFMEMBERSHIP_HPP
 #define ZT_CERTIFICATEOFMEMBERSHIP_HPP
diff --git a/node/CertificateOfOwnership.cpp b/node/CertificateOfOwnership.cpp
index 5a1cbf34..cd115a51 100644
--- a/node/CertificateOfOwnership.cpp
+++ b/node/CertificateOfOwnership.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "CertificateOfOwnership.hpp"
 
diff --git a/node/CertificateOfOwnership.hpp b/node/CertificateOfOwnership.hpp
index 3e2f5b92..1b7b9bc3 100644
--- a/node/CertificateOfOwnership.hpp
+++ b/node/CertificateOfOwnership.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_CERTIFICATEOFOWNERSHIP_HPP
 #define ZT_CERTIFICATEOFOWNERSHIP_HPP
diff --git a/node/Constants.hpp b/node/Constants.hpp
index 66621ec4..6baf8c7f 100644
--- a/node/Constants.hpp
+++ b/node/Constants.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_CONSTANTS_HPP
 #define ZT_CONSTANTS_HPP
diff --git a/node/Credential.hpp b/node/Credential.hpp
index 3f290cad..3065627e 100644
--- a/node/Credential.hpp
+++ b/node/Credential.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_CREDENTIAL_HPP
 #define ZT_CREDENTIAL_HPP
diff --git a/node/DNS.hpp b/node/DNS.hpp
index 79e422e8..a6f5ea22 100644
--- a/node/DNS.hpp
+++ b/node/DNS.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_DNS_HPP
 #define ZT_DNS_HPP
diff --git a/node/Dictionary.hpp b/node/Dictionary.hpp
index 1c6b5262..941227eb 100644
--- a/node/Dictionary.hpp
+++ b/node/Dictionary.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_DICTIONARY_HPP
 #define ZT_DICTIONARY_HPP
diff --git a/node/ECC.hpp b/node/ECC.hpp
index 68f6d5ea..1fc61adb 100644
--- a/node/ECC.hpp
+++ b/node/ECC.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
- *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 /*
  * This file defines the elliptic curve crypto used for ZeroTier V1. The normal
diff --git a/node/Hashtable.hpp b/node/Hashtable.hpp
index eedc4a32..f921c294 100644
--- a/node/Hashtable.hpp
+++ b/node/Hashtable.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_HASHTABLE_HPP
 #define ZT_HASHTABLE_HPP
diff --git a/node/Identity.cpp b/node/Identity.cpp
index 1e6d4212..86f00528 100644
--- a/node/Identity.cpp
+++ b/node/Identity.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Identity.hpp"
 
diff --git a/node/Identity.hpp b/node/Identity.hpp
index 0f82d491..7016aee8 100644
--- a/node/Identity.hpp
+++ b/node/Identity.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_IDENTITY_HPP
 #define ZT_IDENTITY_HPP
diff --git a/node/IncomingPacket.cpp b/node/IncomingPacket.cpp
index 8cf21043..cf55537a 100644
--- a/node/IncomingPacket.cpp
+++ b/node/IncomingPacket.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "IncomingPacket.hpp"
 
@@ -27,8 +22,6 @@
 #include "Peer.hpp"
 #include "Revocation.hpp"
 #include "RuntimeEnvironment.hpp"
-#include "SHA512.hpp"
-#include "Salsa20.hpp"
 #include "SelfAwareness.hpp"
 #include "Switch.hpp"
 #include "Tag.hpp"
diff --git a/node/IncomingPacket.hpp b/node/IncomingPacket.hpp
index ebca8f22..d75a2928 100644
--- a/node/IncomingPacket.hpp
+++ b/node/IncomingPacket.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
- *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_INCOMINGPACKET_HPP
 #define ZT_INCOMINGPACKET_HPP
diff --git a/node/InetAddress.cpp b/node/InetAddress.cpp
index 4d266bdd..81a49e69 100644
--- a/node/InetAddress.cpp
+++ b/node/InetAddress.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "InetAddress.hpp"
 
diff --git a/node/InetAddress.hpp b/node/InetAddress.hpp
index 4e0b8943..fbbe25de 100644
--- a/node/InetAddress.hpp
+++ b/node/InetAddress.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_INETADDRESS_HPP
 #define ZT_INETADDRESS_HPP
diff --git a/node/MAC.hpp b/node/MAC.hpp
index 9cf8454d..f116dc7f 100644
--- a/node/MAC.hpp
+++ b/node/MAC.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_MAC_HPP
 #define ZT_MAC_HPP
diff --git a/node/Membership.cpp b/node/Membership.cpp
index 14b845c6..296a682b 100644
--- a/node/Membership.cpp
+++ b/node/Membership.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Membership.hpp"
 
diff --git a/node/Membership.hpp b/node/Membership.hpp
index 962fb55d..b66d8c95 100644
--- a/node/Membership.hpp
+++ b/node/Membership.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_MEMBERSHIP_HPP
 #define ZT_MEMBERSHIP_HPP
diff --git a/node/Metrics.cpp b/node/Metrics.cpp
index 11232cb0..dd49d86b 100644
--- a/node/Metrics.cpp
+++ b/node/Metrics.cpp
@@ -1,13 +1,9 @@
-/*
- * Copyright (c)2013-2023 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
 
 // clang-format off
diff --git a/node/Metrics.hpp b/node/Metrics.hpp
index 8c2c4290..f4d4e20f 100644
--- a/node/Metrics.hpp
+++ b/node/Metrics.hpp
@@ -1,14 +1,11 @@
-/*
- * Copyright (c)2013-2023 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
+
 #ifndef METRICS_H_
 #define METRICS_H_
 
diff --git a/node/MulticastGroup.hpp b/node/MulticastGroup.hpp
index 53905aa4..6e8cbc48 100644
--- a/node/MulticastGroup.hpp
+++ b/node/MulticastGroup.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_MULTICASTGROUP_HPP
 #define ZT_MULTICASTGROUP_HPP
diff --git a/node/Multicaster.cpp b/node/Multicaster.cpp
index 09acfef9..e87024ff 100644
--- a/node/Multicaster.cpp
+++ b/node/Multicaster.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Multicaster.hpp"
 
diff --git a/node/Multicaster.hpp b/node/Multicaster.hpp
index 0cb6e8f8..0cf11c8c 100644
--- a/node/Multicaster.hpp
+++ b/node/Multicaster.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_MULTICASTER_HPP
 #define ZT_MULTICASTER_HPP
diff --git a/node/Mutex.hpp b/node/Mutex.hpp
index fa8968d3..cdcd759e 100644
--- a/node/Mutex.hpp
+++ b/node/Mutex.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_MUTEX_HPP
 #define ZT_MUTEX_HPP
diff --git a/node/Network.cpp b/node/Network.cpp
index 19a6fd75..85c93099 100644
--- a/node/Network.cpp
+++ b/node/Network.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Network.hpp"
 
diff --git a/node/Network.hpp b/node/Network.hpp
index a622786c..4e417fe8 100644
--- a/node/Network.hpp
+++ b/node/Network.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_NETWORK_HPP
 #define ZT_NETWORK_HPP
diff --git a/node/NetworkConfig.cpp b/node/NetworkConfig.cpp
index 255ec960..7660f953 100644
--- a/node/NetworkConfig.cpp
+++ b/node/NetworkConfig.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "NetworkConfig.hpp"
 
diff --git a/node/NetworkConfig.hpp b/node/NetworkConfig.hpp
index adf8c1e0..e6fdce80 100644
--- a/node/NetworkConfig.hpp
+++ b/node/NetworkConfig.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_NETWORKCONFIG_HPP
 #define ZT_NETWORKCONFIG_HPP
diff --git a/node/NetworkController.hpp b/node/NetworkController.hpp
index 2b2f237d..6891e770 100644
--- a/node/NetworkController.hpp
+++ b/node/NetworkController.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_NETWORKCONFIGMASTER_HPP
 #define ZT_NETWORKCONFIGMASTER_HPP
diff --git a/node/Node.cpp b/node/Node.cpp
index 7f1ac669..4f7a1d61 100644
--- a/node/Node.cpp
+++ b/node/Node.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Node.hpp"
 
diff --git a/node/Node.hpp b/node/Node.hpp
index 2f107533..c659b164 100644
--- a/node/Node.hpp
+++ b/node/Node.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_NODE_HPP
 #define ZT_NODE_HPP
diff --git a/node/OutboundMulticast.cpp b/node/OutboundMulticast.cpp
index 34694507..1978e6e1 100644
--- a/node/OutboundMulticast.cpp
+++ b/node/OutboundMulticast.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "OutboundMulticast.hpp"
 
diff --git a/node/OutboundMulticast.hpp b/node/OutboundMulticast.hpp
index 542151e2..f0913926 100644
--- a/node/OutboundMulticast.hpp
+++ b/node/OutboundMulticast.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_OUTBOUNDMULTICAST_HPP
 #define ZT_OUTBOUNDMULTICAST_HPP
diff --git a/node/Packet.cpp b/node/Packet.cpp
index 88af7610..14bede3a 100644
--- a/node/Packet.cpp
+++ b/node/Packet.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
- *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Packet.hpp"
 
diff --git a/node/Packet.hpp b/node/Packet.hpp
index 80461847..f6b8fdbd 100644
--- a/node/Packet.hpp
+++ b/node/Packet.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
- *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_N_PACKET_HPP
 #define ZT_N_PACKET_HPP
diff --git a/node/PacketMultiplexer.cpp b/node/PacketMultiplexer.cpp
index e5d66097..673b9a3c 100644
--- a/node/PacketMultiplexer.cpp
+++ b/node/PacketMultiplexer.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2021 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "PacketMultiplexer.hpp"
 
diff --git a/node/PacketMultiplexer.hpp b/node/PacketMultiplexer.hpp
index 4753180e..cd8093fe 100644
--- a/node/PacketMultiplexer.hpp
+++ b/node/PacketMultiplexer.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2021 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_PACKET_MULTIPLEXER_HPP
 #define ZT_PACKET_MULTIPLEXER_HPP
@@ -62,4 +57,4 @@ class PacketMultiplexer {
 
 }	// namespace ZeroTier
 
-#endif	 // ZT_PACKET_MULTIPLEXER_HPP
\ No newline at end of file
+#endif	 // ZT_PACKET_MULTIPLEXER_HPP
diff --git a/node/Path.cpp b/node/Path.cpp
index 875f05b4..1525d9e8 100644
--- a/node/Path.cpp
+++ b/node/Path.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Path.hpp"
 
diff --git a/node/Path.hpp b/node/Path.hpp
index 2639173e..ee4c383b 100644
--- a/node/Path.hpp
+++ b/node/Path.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_PATH_HPP
 #define ZT_PATH_HPP
diff --git a/node/Peer.cpp b/node/Peer.cpp
index 1843feea..9d44cf95 100644
--- a/node/Peer.cpp
+++ b/node/Peer.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Peer.hpp"
 
diff --git a/node/Peer.hpp b/node/Peer.hpp
index c6eed83d..8bd36bd3 100644
--- a/node/Peer.hpp
+++ b/node/Peer.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_PEER_HPP
 #define ZT_PEER_HPP
diff --git a/node/Poly1305.hpp b/node/Poly1305.hpp
index e5c3a854..7ffbdd71 100644
--- a/node/Poly1305.hpp
+++ b/node/Poly1305.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_POLY1305_HPP
 #define ZT_POLY1305_HPP
diff --git a/node/Revocation.cpp b/node/Revocation.cpp
index 6da98f26..968ad603 100644
--- a/node/Revocation.cpp
+++ b/node/Revocation.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Revocation.hpp"
 
diff --git a/node/Revocation.hpp b/node/Revocation.hpp
index b6edccf5..3337aabc 100644
--- a/node/Revocation.hpp
+++ b/node/Revocation.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_REVOCATION_HPP
 #define ZT_REVOCATION_HPP
diff --git a/node/RingBuffer.hpp b/node/RingBuffer.hpp
index f9956289..32474aaa 100644
--- a/node/RingBuffer.hpp
+++ b/node/RingBuffer.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_RINGBUFFER_H
 #define ZT_RINGBUFFER_H
diff --git a/node/RuntimeEnvironment.hpp b/node/RuntimeEnvironment.hpp
index f55955ee..8fca4730 100644
--- a/node/RuntimeEnvironment.hpp
+++ b/node/RuntimeEnvironment.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_RUNTIMEENVIRONMENT_HPP
 #define ZT_RUNTIMEENVIRONMENT_HPP
diff --git a/node/SHA512.hpp b/node/SHA512.hpp
index 3849856e..abd525ec 100644
--- a/node/SHA512.hpp
+++ b/node/SHA512.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_SHA512_HPP
 #define ZT_SHA512_HPP
diff --git a/node/SelfAwareness.cpp b/node/SelfAwareness.cpp
index c73dd4b0..098eb941 100644
--- a/node/SelfAwareness.cpp
+++ b/node/SelfAwareness.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "SelfAwareness.hpp"
 
diff --git a/node/SelfAwareness.hpp b/node/SelfAwareness.hpp
index 52753700..1ee64df2 100644
--- a/node/SelfAwareness.hpp
+++ b/node/SelfAwareness.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_SELFAWARENESS_HPP
 #define ZT_SELFAWARENESS_HPP
diff --git a/node/SharedPtr.hpp b/node/SharedPtr.hpp
index ef720cab..f4e936a4 100644
--- a/node/SharedPtr.hpp
+++ b/node/SharedPtr.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_SHAREDPTR_HPP
 #define ZT_SHAREDPTR_HPP
diff --git a/node/Switch.cpp b/node/Switch.cpp
index bdbce3f3..4de7ee8c 100644
--- a/node/Switch.cpp
+++ b/node/Switch.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Switch.hpp"
 
diff --git a/node/Switch.hpp b/node/Switch.hpp
index a07b6f31..7c287f45 100644
--- a/node/Switch.hpp
+++ b/node/Switch.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2013-2020 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_N_SWITCH_HPP
 #define ZT_N_SWITCH_HPP
diff --git a/node/Tag.cpp b/node/Tag.cpp
index a1ce0c0e..7d483343 100644
--- a/node/Tag.cpp
+++ b/node/Tag.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Tag.hpp"
 
diff --git a/node/Tag.hpp b/node/Tag.hpp
index 0243264a..3273ba03 100644
--- a/node/Tag.hpp
+++ b/node/Tag.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_TAG_HPP
 #define ZT_TAG_HPP
diff --git a/node/Topology.cpp b/node/Topology.cpp
index 7991dfb7..30671056 100644
--- a/node/Topology.cpp
+++ b/node/Topology.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Topology.hpp"
 
diff --git a/node/Topology.hpp b/node/Topology.hpp
index a244d284..527e2735 100644
--- a/node/Topology.hpp
+++ b/node/Topology.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_TOPOLOGY_HPP
 #define ZT_TOPOLOGY_HPP
diff --git a/node/Trace.cpp b/node/Trace.cpp
index da40d90a..8fc4394e 100644
--- a/node/Trace.cpp
+++ b/node/Trace.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 // #define ZT_TRACE
 
diff --git a/node/Trace.hpp b/node/Trace.hpp
index 991974c5..5a77c379 100644
--- a/node/Trace.hpp
+++ b/node/Trace.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_TRACE_HPP
 #define ZT_TRACE_HPP
diff --git a/node/Utils.cpp b/node/Utils.cpp
index ad838a7f..705b6bd4 100644
--- a/node/Utils.cpp
+++ b/node/Utils.cpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #include "Constants.hpp"
 
diff --git a/node/Utils.hpp b/node/Utils.hpp
index 76241ab5..157e10a3 100644
--- a/node/Utils.hpp
+++ b/node/Utils.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_UTILS_HPP
 #define ZT_UTILS_HPP
diff --git a/node/World.hpp b/node/World.hpp
index 6806a01b..bf148972 100644
--- a/node/World.hpp
+++ b/node/World.hpp
@@ -1,15 +1,10 @@
-/*
- * Copyright (c)2019 ZeroTier, Inc.
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
  *
- * Use of this software is governed by the Business Source License included
- * in the LICENSE.TXT file in the project's root directory.
- *
- * Change Date: 2026-01-01
- *
- * On the date above, in accordance with the Business Source License, use
- * of this software will be governed by version 2.0 of the Apache License.
+ * (c) ZeroTier, Inc.
+ * https://www.zerotier.com/
  */
-/****/
 
 #ifndef ZT_WORLD_HPP
 #define ZT_WORLD_HPP