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SubjectRe: bizarre TCP behavior
On Wed, Apr 11, 2001 at 02:21:42AM +0200, Andi Kleen wrote:

> Try echo 0 > /proc/sys/net/ipv4/tcp_ecn
> If it helps complain to the sites that their firewall is broken.

Not always firewall related.
There are companies like Zyxel that ship broken router
too.

For example the Zyxel 681 SDSL-Router breaks ECN by
stripping 0x80 (ECN Cwnd Reduced) but not 0x40 (ECN Echo)
(TOS bits) on all SYN packets (!).

I complained because of this two times more than a month ago
but they do not even respond.

I do not know if they are unable or just unwilling to fix it;
maybe they just unable to read RFC's.

--

ciao -
Stefan
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