Re: "CE" - Where's the snot?

[Antony Stone <Antony@Soft-Solutions.co.uk>]

On Saturday 24 July 2004 9:22 pm, David Cary Hart wrote:

> On Sat, 2004-07-24 at 11:44, Antony Stone wrote:
> > Excuse me, but *what* are you seeing?
> >
> > I can see the subject of this posting, but it means nothing to me.
> >
> > Please explain the problem so we can understand what it is.
>
> Jul 24 16:21:01 mail kernel: - Firewall:  IN=eth0 OUT=
> MAC=00:4f:4e:12:f9:93:00:09:5b:c9:37:54:08:00  SRC=68.236.163.19 D
> ST=192.168.0.31 LEN=41 TOS=00 PREC=0x00 TTL=126 ID=59477 CE DF PROTO=TCP
> SPT=4694 DPT=135 SEQ=4252944646 ACK=3536024229 WIND
> OW=64320 ACK URGP=0
>
> Note the "CE" just in front of "DF" = Congestion Experienced

It seems that the CE bit is set by some router in the path of the packets, 
therefore this is unlikely to be a problem on your network or firewall 
(unless you have your own routers perhaps).

http://www.zvon.org/tmRFC/RFC2884/Output/chapter3.html

A Google search for TCP and Congestion Experienced should give you a good 
background into why this bit may get set, however I don't think there's a way 
to find out which router set it.

Is it causing you any problems?

Regards,

Antony.

-- 
"The problem with television is that the people must sit and keep their eyes 
glued on a screen; the average American family hasn't time for it."

 - New York Times, following a demonstration at the 1939 World's Fair.

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