Re: DoS by small packets: eth0: Too much work at interrupt, IntrStatus=0x0001.

[Don Buchholz <buchholz easystreet com>]

Milan Keršláger wrote:

> I have a trouble with DoS attacks to one internal machine through RHEL3
> router. It seems that a lot of small packets causing DoS (100Mbps links)
> on my router even I shut down my firewall rules.
>
> The machine has two RTL8139C cards. I tryed 3C905 cards with no luck.
> Just after plugging UTP cable into the machine the system slow down and
> freeze until UTP has been unplugged.
>
> Is there a chance to avoid this problem? Is it know bug?
>
> I see a lot of lines with this error message in dmesg output:
>
> eth0: Too much work at interrupt, IntrStatus=0x0001.
We had a similar problem, with an "8169" gigabit card, though. It
was some bizarre Taiwanese (?) brand -- "Zen", I think.
Resetting the driver -- ifconfig down, rmmod, modprobe, ifconfig up
would work for a while, but the real answer was to get a different
ethernet card.