Re: many web site can not be access, need help

[Alan Shutko <ats@acm.org>]

eric <lshih@qwest.net> writes:

>    after many update upgrade
> I fail to  access web site like ibm, intel, etc

Upgraded to kernel 2.4 lately?

Try 

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

If that cures your problem, you've run into sites with firewalls which
block Explicit Congestion Notification, an experimental standard to
help detect congestion in tcp connections.  You can turn this off
permanently by

* Recompiling your kernel with TCP Explicit Congestion Notification support
  (CONFIG_INET_ECN) off, or

* Adding net.ipv4.tcp_ecn = 0 to your /etc/sysctl.conf.

-- 
Alan Shutko <ats@acm.org> - In a variety of flavors!
A visit to a strange place will bring fresh work.