Re: hotmail can't deal with ECN

From: CaT (cat@zip.com.au)
Date: Thu Jan 25 2001 - 20:08:31 EST

On Thu, Jan 25, 2001 at 05:04:23PM -0800, David S. Miller wrote:
>
> CaT writes:
> > gozer:~# more /proc/sys/net/ipv4/tcp_ecn
> > 1
> >
> > and I can contact hotmail just fine.
> ...
> > where should I go to on hotmail to see it fail?
>
> Try telnetting to port 25 on one of their
> "*.hotmail.com" MX records.

Boom. Bingo:

gozer:~# telnet mc6.law5.hotmail.com 25
Trying 216.33.238.136...
telnet: Unable to connect to remote host: Connection refused

Big baddaboom :)

And it answers my question of wether or not it does ECN for non-ECN
boxes behind the firewall:

[11:29:31] root@theirongiant:/root>> telnet mc6.law5.hotmail.com 25
Trying 216.33.238.136...
Connected to mc6.law5.hotmail.com.
Escape character is '^]'.
220-HotMail (NO UCE) ESMTP server ready at Thu Jan 25 17:06:07 2001
220 ESMTP spoken here
554 Transaction failed
Connection closed by foreign host.
[12:06:37] root@theirongiant:/root>> uname -a
Linux theirongiant 2.2.19pre7 #3 Tue Jan 16 18:07:56 EST 2001 i686 unknown

Thanks for that. :) I'll be leaving ECN turned on on the box regardless
I think. 

-- 
CaT (cat@zip.com.au)		*** Jenna has joined the channel.
				<cat> speaking of mental giants..
				<Jenna> me, a giant, bullshit
				<Jenna> And i'm not mental
					- An IRC session, 20/12/2000

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This archive was generated by hypermail 2b29 : Wed Jan 31 2001 - 21:00:23 EST