Re: window tracking firewall involved, was: Re: preliminary conclusions regarding window size issues

On Thu, 2004-07-08 at 17:37, David S. Miller wrote:

quoted

This has now been confirmed with the packages.gentoo.org firewall!

It's the netfilter patches added to the gentoo WOLK kernel running
on packages.gentoo.org

Specifically, it's the tcp-window-tracking patch from netfilter's
patch-o-matic.  There's some bug in there wrt. it's window scaling
support.

I bet if the tcp-window-scaling diff is removed from the kernel running
there, the problem will totally go away.

I note that it is using a very old version of the tcp-window-tracking
patch, the current version is 2.2 and probably fixes this bug.  The
gentoo linux-2.4.20-wolk-4.14 kernel is using version 1.7

That bug was probably fixed May 21 2003 according to cvs history.
"Patch updated: window scaling bug fixed, improved, etc. (JK)."
It updates the version to 1.9

As reference, I'm using v2.2 with -bk from 040626 which does use
wscale=7 and I don't see any problems connecting to/from machines with
lower or equal wscale. I drop and log all packets tcp-window-tracking
classifies as INVALID.

-- 
/Martin