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SubjectRe: Microsoft IE6 is crashing with Linux 2.4.X

"David Flynn" <> wrote:

> > The connection to the server has failed. Account: '',
> > Server: '', Protocol: SMTP, Port: 25, Secure(SSL): No,
> > Socket Error: 10061, Error Number: 0x800CCC0E
> This error is WSACONNREFUSED, (ie connection refused), this is generated by
> the target machine. Check to see if you can 'telnet' the into the box,

You might want to check to see if TCP_ECN (Explicit Congestion
Notification) is enabled. Many of the later Linux 2.4.x kernels enable
it automatically if it's compiled in (I don't know if this is still the
case or not), and some OSes simply refuse all connections whose SYN
packets are marked this way.

I wouldn't be terribly surprised if the a recent version of IE6 changed
the default TCP settings to make Windows not work with it.

The simple way to check is:

cat /proc/sys/net/ipv4/tcp_ecn

If it's a "1", then it's enabled, if "0" or you get a file not found, that
isn't the problem.

Erich Stefan Boleyn <>
"Reality is truly stranger than fiction; Probably why fiction is so popular"
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