mtu

check out your MTU and rcv-Window

in quake mtu have to be more than 5xx ...(mtu biger 500 & smaler 600)
x=minimum mtu value for q3a cpma

check out (with ping) your optimum mtu (a mtu which are not defragment)

windows:
ping -f -l 1456 t-online.de
http://www.gschwarz.de/mtu-wert.htm


linux:
ping -s 1464 -M do t-online.de

sudo gedit /etc/rc.local
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

ifconfig eth3 mtu 600
echo 256960 >> /proc/sys/net/core/rmem_default
echo 256960 >> /proc/sys/net/core/rmem_max
echo 0 >> /proc/sys/net/ipv4/tcp_timestamps
echo 1 >> /proc/sys/net/ipv4/tcp_sack
echo 1 >> /proc/sys/net/ipv4/tcp_window_scaling

exit 0

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ reboot
or some freaky linux command