diff --git a/osbase/net/dns/forward/cache.go b/osbase/net/dns/forward/cache.go
index d2422a9..55697ca 100644
--- a/osbase/net/dns/forward/cache.go
+++ b/osbase/net/dns/forward/cache.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package forward
 
 import (
diff --git a/osbase/net/dns/forward/cache/cache.go b/osbase/net/dns/forward/cache/cache.go
index 8c151a6..114939b 100644
--- a/osbase/net/dns/forward/cache/cache.go
+++ b/osbase/net/dns/forward/cache/cache.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package cache implements a cache. The cache hold 256 shards, each shard
 // holds a cache: a map with a mutex. There is no fancy expunge algorithm, it
 // just randomly evicts elements when it gets full.
diff --git a/osbase/net/dns/forward/cache/cache_test.go b/osbase/net/dns/forward/cache/cache_test.go
index 8a2b80c..5542158 100644
--- a/osbase/net/dns/forward/cache/cache_test.go
+++ b/osbase/net/dns/forward/cache/cache_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package cache
 
 // Taken and modified from CoreDNS, under Apache 2.0.
diff --git a/osbase/net/dns/forward/cache/shard_test.go b/osbase/net/dns/forward/cache/shard_test.go
index 452f8cc..f8e3153 100644
--- a/osbase/net/dns/forward/cache/shard_test.go
+++ b/osbase/net/dns/forward/cache/shard_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package cache
 
 // Taken and modified from CoreDNS, under Apache 2.0.
diff --git a/osbase/net/dns/forward/forward.go b/osbase/net/dns/forward/forward.go
index 00271ec..c4222c9 100644
--- a/osbase/net/dns/forward/forward.go
+++ b/osbase/net/dns/forward/forward.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package forward implements a forwarding proxy.
 //
 // A cache is used to reduce load on the upstream servers. Cached items are only
diff --git a/osbase/net/dns/forward/forward_test.go b/osbase/net/dns/forward/forward_test.go
index f850591..ddab957 100644
--- a/osbase/net/dns/forward/forward_test.go
+++ b/osbase/net/dns/forward/forward_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package forward
 
 import (
diff --git a/osbase/net/dns/forward/metrics.go b/osbase/net/dns/forward/metrics.go
index 4977b02..78753d1 100644
--- a/osbase/net/dns/forward/metrics.go
+++ b/osbase/net/dns/forward/metrics.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package forward
 
 // Taken and modified from CoreDNS, under Apache 2.0.
diff --git a/osbase/net/dns/forward/proxy/connect.go b/osbase/net/dns/forward/proxy/connect.go
index d1c5b8e..a11e8e6 100644
--- a/osbase/net/dns/forward/proxy/connect.go
+++ b/osbase/net/dns/forward/proxy/connect.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package proxy implements a forwarding proxy. It caches an upstream net.Conn
 // for some time, so if the same client returns the upstream's Conn will be
 // precached. Depending on how you benchmark this looks to be 50% faster than
diff --git a/osbase/net/dns/forward/proxy/health.go b/osbase/net/dns/forward/proxy/health.go
index 4630cdc..29fe848 100644
--- a/osbase/net/dns/forward/proxy/health.go
+++ b/osbase/net/dns/forward/proxy/health.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package proxy
 
 // Taken and modified from CoreDNS, under Apache 2.0.
diff --git a/osbase/net/dns/forward/proxy/health_test.go b/osbase/net/dns/forward/proxy/health_test.go
index ef8b60a..d7b3280 100644
--- a/osbase/net/dns/forward/proxy/health_test.go
+++ b/osbase/net/dns/forward/proxy/health_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package proxy
 
 // Taken and modified from CoreDNS, under Apache 2.0.
diff --git a/osbase/net/dns/forward/proxy/metrics.go b/osbase/net/dns/forward/proxy/metrics.go
index c08f1d8..625ab99 100644
--- a/osbase/net/dns/forward/proxy/metrics.go
+++ b/osbase/net/dns/forward/proxy/metrics.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package proxy
 
 // Taken and modified from CoreDNS, under Apache 2.0.
diff --git a/osbase/net/dns/forward/proxy/persistent.go b/osbase/net/dns/forward/proxy/persistent.go
index cb4f618..83fea11 100644
--- a/osbase/net/dns/forward/proxy/persistent.go
+++ b/osbase/net/dns/forward/proxy/persistent.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package proxy
 
 // Taken and modified from CoreDNS, under Apache 2.0.
diff --git a/osbase/net/dns/forward/proxy/persistent_test.go b/osbase/net/dns/forward/proxy/persistent_test.go
index 2856c3f..b54c0dd 100644
--- a/osbase/net/dns/forward/proxy/persistent_test.go
+++ b/osbase/net/dns/forward/proxy/persistent_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package proxy
 
 // Taken and modified from CoreDNS, under Apache 2.0.
diff --git a/osbase/net/dns/forward/proxy/proxy.go b/osbase/net/dns/forward/proxy/proxy.go
index dc25a31..a1da587 100644
--- a/osbase/net/dns/forward/proxy/proxy.go
+++ b/osbase/net/dns/forward/proxy/proxy.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package proxy
 
 // Taken and modified from CoreDNS, under Apache 2.0.
diff --git a/osbase/net/dns/forward/proxy/proxy_test.go b/osbase/net/dns/forward/proxy/proxy_test.go
index a9297da..4d120a6 100644
--- a/osbase/net/dns/forward/proxy/proxy_test.go
+++ b/osbase/net/dns/forward/proxy/proxy_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package proxy
 
 // Taken and modified from CoreDNS, under Apache 2.0.
diff --git a/osbase/net/dns/forward/proxy/type.go b/osbase/net/dns/forward/proxy/type.go
index 6eb78ce..65821cc 100644
--- a/osbase/net/dns/forward/proxy/type.go
+++ b/osbase/net/dns/forward/proxy/type.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package proxy
 
 // Taken and modified from CoreDNS, under Apache 2.0.
diff --git a/osbase/net/dns/forward/up/up.go b/osbase/net/dns/forward/up/up.go
index 9806319..3b208d9 100644
--- a/osbase/net/dns/forward/up/up.go
+++ b/osbase/net/dns/forward/up/up.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package up is used to run a function for some duration. If a new function is
 // added while a previous run is still ongoing, nothing new will be executed.
 package up
diff --git a/osbase/net/dns/forward/up/up_test.go b/osbase/net/dns/forward/up/up_test.go
index 0d0f928..acf3b96 100644
--- a/osbase/net/dns/forward/up/up_test.go
+++ b/osbase/net/dns/forward/up/up_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package up
 
 // Taken and modified from CoreDNS, under Apache 2.0.