By default timeouts on Linksys routers are set too high thus connections don't time out without opening new ones.

This seems to work on most of the 3rd party firmware, add the following to your startup script. Use at your own risk!!.
Only tested with HyperWRT 2.1 b1.

echo 4096 > /proc/sys/net/ipv4/ip_conntrack_max
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
echo 1 > /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses
echo 512 > /proc/sys/net/ipv4/neigh/default/gc_thresh1
echo 2048 > /proc/sys/net/ipv4/neigh/default/gc_thresh2
echo 4096 > /proc/sys/net/ipv4/neigh/default/gc_thresh3
echo "600 1800 120 60 120 120 10 60 30 120" > /proc/sys/net/ipv4/ip_conntrack_tcp_timeouts
 

EXPLANATION:

300 600 120 60 120 120 10 60 30 120
NONE = 300 (5 minutes)
ESTABLISHED = 600 (10 minutes)
SYN_SENT = 120 (2 minutes)
SYN_RECV = 60 (60 seconds)
FIN_WAIT = 120 (2 minutes)
TIME_WAIT = 120 (2 minutes)
CLOSE = 10 (10 seconds)
CLOSE_WAIT = 60 (60 seconds)
LAST_ACK = 30 (30 seconds)
LISTEN = 120 (2 minutes)


got feedback? got feedback?

Any feedback you provide is sent to the owner of this FAQ for possible incorporation and shown publically as well.

by Lanik
last modified: 2005-09-04 13:57:53