On 2011-08-12 17:45, Christian Pernegger wrote: >> Please post your iptables / iptables-restore script. > > I did, in a way. It's really just that one line, "iptables -t nat -A > POSTROUTING -s 192.168.0.0/24 -o eth1 -j MASQUERADE", at the moment, > executed as a post-up command from /etc/network/interfaces. I doubt that's the problem, then. I would write it without the "-s 192.168.0.0/24" statement, as it is not needed if you have no other networks or interfaces. But I very much doubt it is the cause of the problem. You said the problem only happens to NAT'ed traffic. What if it's not NAT, but eth0, that's the issue? Try swapping eth0 and eth1 and see if the problem affects traffic to/from the router as well. I recently had a problem with one server (with an old cheap Via chipset) that ran fine on Ubuntu 8.04. But when I reformatted it for Ubuntu 10.04, eth0 started having serious issues with throughput that I eventually concluded was an IRQ issue. Since it had two interfaces, I renamed them and used the other one. Regards, Tyler -- "Offending fundamentalists isn't my goal – but if it is an inevitable side-effect of defending human rights, so be it." -- Johann Hari -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
