Re: ip_conntrack_tcp Errors

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On 28 Jun 2004, Evgeni Vachkov wrote:

> > > patch? ...Or perhaps it is some other problem with other parts of the
> > > kernel?
> > It seems to me that you have applied the tcp window tracking patch from pom-ng.
> > The problem is that the client and the server have done the first step of the
> > three way handshake, and are in sync, but the firewall for some reason is not.
> > So it drops the SYN/ACK, and thus forcing the client to retransmit its SYN and
> > initiate a new session (as descibed in the source code of the patch)
> >
> > My advice is if you have applied this patch, to remove it, and test the load on the
> > firewall again.
>
> As far as I can figure out we are running with
> patch-o-matic-ng-20040302. I can see that the latest is
> patch-o-matic-ng-20040621. Is this problem present at the version we are
> running and is the new version still having the window tracking issues?

SACK support was added to the patch in patch-o-matic-ng-20040621 with some
minor fixes, compared to patch-o-matic-ng-20040302. It does not hurt to
upgrade but I don't expect that it'd behave differently in your test.

Best regards,
Jozsef
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