[TriLUG] new kernel breaks email access?

[John Turner]

I removed TCP_ECN from my kernel config and recompiled,
now all seems to be okay.

Thanks
John

On Tue, Dec 04, 2001 at 10:43:31PM -0500, Ed Warnicke wrote:
> Here's a stray thought...  check to see if ECN ( Explicite Congestion
> Notification ) is enabled
> 
> You can do this with 
> 
> cat /proc/sys/net/ipv4/tcp_ecn
> 
> if this returns 
> 
> 0
> 
> then I'm full of it, ecn is not enabled.
> 
> If it returns 
> 
> 1 
> 
> then ecn is enabled and you could try 
> 
> echo 0 > /proc/sys/net/ipv4/tcp_ecn
> 
> And then try to connect to your mail server again.
> 
> The mail servers for RR may be behind one of the many 
> buggy load balancers/firewalls that puke all over ECN, 
> that could be causing your problem. 
> 
> Oh, and if that turns out to be the problem, please complain to 
> Time Warner about the fact that their infrastructure is broken.
> 
> Ed 
> 
> On Tue, 2001-12-04 at 22:01, John Turner wrote:
> > So I downloaded 2.4.16 from kernel.org and
> > got it all installed. When I rebooted using
> > my new kernel, my POP/SMTP email to nc.rr.com
> > stopped working. POP/SMTP connections to the
> > RR server are refused. I tested a SMTP connection
> > to trilug.org and that worked fine.
> > 
> > Rebooting back into the old kernel (RH 7.2 and
> > 2.4.7) and things are working. 
> > 
> > I am sure this is something simple, anyone?
> > 
> > John
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>