diff --git a/IT/Deploying Syncthing.md b/IT/Deploying Syncthing.md
index 22f70a4..5f7f15d 100644
--- a/IT/Deploying Syncthing.md	
+++ b/IT/Deploying Syncthing.md	
@@ -8,3 +8,5 @@ The systemd service was edited to include the `--home=/opt/syncthing` path, and
 
 The config was updated to replace the default gui IP (127.0.0.1) with 0.0.0.0 to make the gui accessible to other computers
 
+https://docs.syncthing.net/users/firewall.html#firewall-setup
+