Hi! I'm having a very strange problem. I have already tested a *lot* of things before asking, and I still have no clue of wha't happening. I have 6 linux boxes acting as firewalls/routers. They are using similar configurations and netfilter rules since 4 years ago, when I installed the first of these. Some of them route more than 10 Mbps between interfaces, 50000+ connections tracked with netfilter, traffic shaping, NAT, and stuff, and they don't even blink. BUT, two of them started giving headaches, they doesn't have the highes usage, but they lose packets (in any interface) up to 80%, sometimes softirqd eats all the cpu, and you cannot even connect to the boxes. This does not happen from the very first day, and not all the time! I tried rewriting the rules, turning off traffic shaping, changing NICs, then changing ALL the hardware (they have some very nice and fast hardware now). I even migrated from debian woody with 2.4.x kernels to debian sarge with 2.6.8 kernels and the problem is still the same. I don't really know what to do. I suspect that this could be triggered by some internet DoS attack, but I didn't find anything special (I have already solved the recursion problem with DNS servers). The 6 servers receive loads of dumb attacks all the time. Any help would be greatly appreciated! PS: please, CC me, I'm not subscribed. -- Martín Ferrari - : send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
