diff --git a/oneliners.sh b/oneliners.sh
index 6f4323b..418dec9 100644
--- a/oneliners.sh
+++ b/oneliners.sh
@@ -11,3 +11,6 @@ cat file.xml | sed -n -e 's/.*<ns5\:Daten\ xmime\:contentType\=\"application\/pd
 
 # prettify PATH-Output:
 echo $PATH | sed s/\:/\\n/g
+
+# check for open ports on target
+for i in 80 443; do echo -e '\x1dclose\x0d' | telnet google.com $i >/dev/null; echo "$i : $?"; done