Re: Mystics of packet forwarding

[Roman Fiedler <roman.fiedler@telbiomed.at>]

Ivan Petrushev wrote:
>> Ok, it seems that really - someone in LAN is attacking the internet.
> It could be worms or viruses. In my experience every home or student
> Windows network is awfully crowded with viruses. Maybe you should work
> on filtering your outgoing traffic.
>
> I'm not sure, but search on google what could cause ban on DIGG or
> YAHOO. Probably lots of connections or flood could result in banning
> you from these sites. But you say that immediately when you remove the
> NAT rules the access is restored? I don't believe their firewalls are
> quick enough to restore your position two seconds after you stop being
> "bad" to them. Maybe something else is the reason.

Are there any hardcoded external IPs in your ruleset? These might fail 
if other hosts have some DNS-round-robin.