diff --git a/remote-support-mambasoft/remote-support-mambasoft.sh.in b/remote-support-mambasoft/remote-support-mambasoft.sh.in
index e2ba9e3..b14c742 100755
--- a/remote-support-mambasoft/remote-support-mambasoft.sh.in
+++ b/remote-support-mambasoft/remote-support-mambasoft.sh.in
@@ -1,3 +1,5 @@
 #!/bin/bash
+[ "$1" ] && LOCAL_PORT=$1 || LOCAL_PORT=22
+[ "$2" ] && REMOTE_PORT=$2 || REMOTE_PORT=$(($LOCAL_PORT + 45000))
 export SSH_ASKPASS=@libexecdir@/openssh/ssh-askpass
-ssh -p 4424 -N -R 45678:localhost:22 assistenza@services.mambasoft.it
+ssh -p 4424 -N -R $REMOTE_PORT:localhost:$LOCAL_PORT assistenza@services.mambasoft.it