On Wednesday, Oct 31, 2001, Jason Bodnar wrote:
> After much trial and error I determined the cause of this problem: TCP Explicit
> Congestion Notification support is built into the stock Mandrake 8.1 kernel and
> is not turned off at boot time. Obviously, the root of the problem is
> walgreens, etc. having bad routers (not sure why my print server was refusing
> the connection as well) but Mandrake either needs to disable this in their
> kernels or provide an init script that does:
>
> echo 0 > /proc/sys/net/ipv4/tcp_ecn
>
> Very, very nasty problem to track down.
Old message, I know, but it is disabled by default on 8.1:
[paul@anne paul]$ cat /etc/sysctl.conf
# Disables packet forwarding
net.ipv4.ip_forward = 0
# Disable ECN
net.ipv4.tcp_ecn = 0
# Enables source route verification
net.ipv4.conf.default.rp_filter = 1
# Disables the magic-sysrq key
#kernel.sysrq = 0
[paul@anne paul]$ rpm -qf /etc/sysctl.conf
initscripts-6.27-10.4mdk
(10.4mdk was a security update from the delivered initscripts,
but didn't change anything in sysctl.conf)
--
Paul Cox <paul at coxcentral dot com>
Kernel: 2.4.8-34.1mdk - Uptime: 21 hours 17 minutes.
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