christian niessner wrote:


das ist aber nicht zufaellig das tcp_ecn problem?


cat /proc/sys/net/ipv4/tcp_ecn
echo 0 > /proc/sys/net/ipv4/tcp_ecn

weil, imho, bis 2.4.18 war default 0, ab 2.4.19 ist default 1...

ciao,
        marvin


Ja ist es! (Yes it is!) Vielen Dank!

Here is what /usr/src/linux/Documentation/Configure.help says about it:

TCP Explicit Congestion Notification support
CONFIG_INET_ECN
  Explicit Congestion Notification (ECN) allows routers to notify
  clients about network congestion, resulting in fewer dropped packets
  and increased network performance.  This option adds ECN support to
  the Linux kernel, as well as a sysctl (/proc/sys/net/ipv4/tcp_ecn)
  which allows ECN support to be disabled at runtime.

  Note that, on the Internet, there are many broken firewalls which
  refuse connections from ECN-enabled machines, and it may be a while
  before these firewalls are fixed.  Until then, to access a site
  behind such a firewall (some of which are major sites, at the time
  of this writing) you will have to disable this option, either by
  saying N now or by using the sysctl.

If in doubt, say N.

An enty in /etc/sysctl.conf: net/ipv4/tcp_ecn=0
and "systcl -p" will do away with this problem.
--
lg, Chris
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