Hello, nothing to do with firewalls but with security, sory for the off-topic. nmap say that port 783 on my gateway and 753 on my local computer are open. netstat says tha listening and these ports are : 783 : hp-alarm-mgr 753 : rrh Theses ports are not in /etc/services. I fear a worm or other silly thing. I don't know what are they. Hope someone can explain this. Surely on private. Thanks. David Dumortier.