Re: hotmail can't deal with ECN

David S. Miller (davem@redhat.com)
Thu, 25 Jan 2001 17:04:23 -0800 (PST)


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.

For example:
? host -a hostmail.com
...
hostmail.com 651 IN MX 10 mc6.law5.hotmail.com
...
mc6.law5.hotmail.com 383 IN A 216.33.238.136
? telnet 216.33.238.136 25
Trying 216.33.238.136...
telnet: Unable to connect to remote host: Connection refused
?

Some of the MX records that show up for hotmail.com go
to different machines, such as INKY.SOLINUS.COM which seems
to let ECN connections through just fine.

Later,
David S. Miller
davem@redhat.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/