diff --git a/fish/.config/fish/config.fish b/fish/.config/fish/config.fish
index 78b0754..073d151 100644
--- a/fish/.config/fish/config.fish
+++ b/fish/.config/fish/config.fish
@@ -28,4 +28,8 @@ function seconds
     #bash -c 'while true; do printf \'   %s\r\' "$(date +%S)" | toilet -f smmono12 ; done'
 end
 
+function open-tcp-ports
+    sudo lsof -i -P -n | grep LISTEN
+end
+
 clear