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.