Hi Eric, On Wed, Mar 20, 2013 at 09:18:21PM -0600, Eric Blake wrote: [...] > > By looking at the changes you made: > > > >> --A FI-vnet0 -p tcp -m tcp --sport 110 -m conntrack --ctstate > >> ESTABLISHED -m conntrack --ctdir ORIGINAL -j RETURN > >> +-A FI-vnet0 -p tcp -m tcp --sport 110 -m conntrack --ctstate > >> ESTABLISHED -m conntrack --ctdir REPLY -j RETURN > > > > The first rule looks wrong to me indeed, traffic coming in the > > original direction will initiate the connection to destination port > > TCP/110. Therefore, your change is correct. > > Correct for the new kernel interpretation, but we also want to support > use of libvirt with older kernels, preferably with a runtime check so > that a binary compiled on an older kernel will still work after a kernel > upgrade. My suggestion is to relax that rule-set that you're using, ie. remove the --ctdir. The connection tracking table and the TCP tracker already take care for those invalid situations that you were trying to catch with that --ctdir. You only have to add an iptables rule somewhere to catch invalid packets. I can also pass that patch to -stable starting 2.6.32 if that helps, but you will still have to fix your rule-set. -- 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
