diff --git a/turnserver.md b/turnserver.md
index 71dcd26a2..c7653ae12 100644
--- a/turnserver.md
+++ b/turnserver.md
@@ -29,6 +29,8 @@ If you want to setup a firewall or configure an existing firewall, you can see t
 sudo apt install net-tools
 sudo ufw allow 3478/tcp # The default coturn TCP port
 sudo ufw allow 3478/udp # The default coturn UDP port
+sudo ufw allow 3479/tcp # Sometimes port+1 is used
+sudo ufw allow 3479/udp # Sometimes port+1 is used
 sudo ufw allow 443/tcp # The HTTPS TCP port
 sudo ufw allow 443/udp # The HTTPS UDP port
 sudo ufw allow 49152:65535/tcp