networking crash suddenly in my home LAN

[csanyipal@gmail.com (Csányi Pál)]

Hello!

I have at home a small LAN with Debian GNU/Linux Etch boxes.

The gateway/router can to access the internet but server and desktop
can't.

I have setup shorewall (iptables) on every three system and so far it
works but today it works not.

I tried with command 'shorewall clear' to clear firewall but still
can't reach internet from server and desktop box.

What could cause this behavior and how can I solve this problem?

Any advices will be appreciated!

--
Regards, Paul