[TriLUG] new kernel breaks email access?

[Ed Warnicke]

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
> _______________________________________________
> TriLUG mailing list
> http://www.trilug.org/mailman/listinfo/trilug

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