"Indika" == Indika Piyasena <ipiyasena@crg.ee.uct.ac.za> writes: Indika> I?m sure it is possible to disable the TCP-SACK Indika> option. How is this possible? $ cat /proc/sys/net/ipv4/tcp_sack 1 $ echo 0 > /proc/sys/net/ipv4/tcp_sack $ should do the trick. Please try not posting Microsoft specific HTML formatted email to a Debian list ;-) Cheers! Shyamal