diff --git a/doc/release-notes-33004.md b/doc/release-notes-33004.md
new file mode 100644
index 00000000000..c8a869f5046
--- /dev/null
+++ b/doc/release-notes-33004.md
@@ -0,0 +1,6 @@
+Updated settings
+----------------
+
+* The `-natpmp` option is now set to `1` by default. This means nodes with `-listen` enabled (the
+  default) but running behind a firewall, such as a local network router, will be reachable if the
+  firewall/router supports any of the `PCP` or `NAT-PMP` protocols.
diff --git a/src/mapport.h b/src/mapport.h
index 3f16b2ea619..ea16aef7da0 100644
--- a/src/mapport.h
+++ b/src/mapport.h
@@ -5,7 +5,7 @@
 #ifndef BITCOIN_MAPPORT_H
 #define BITCOIN_MAPPORT_H
 
-static constexpr bool DEFAULT_NATPMP = false;
+static constexpr bool DEFAULT_NATPMP = true;
 
 void StartMapPort(bool enable);
 void InterruptMapPort();