If you run a DD-WRT powered router (Linksys WRTG/GL/GS probably) and doing your P2P thing with µTorrent your may get strange behavior from your router.
I had low download (but not upload!) speeds, poor Wi-Fi connectivity and inability to connect to routers web admin page. Sometimes it helped if I turned off the other P2P app, sometimes not. Sometimes it happened twice per evening and sometimes once per week. All in all a annoying bugger to find. Tried to upgrade to v23 sp2, but no luck.
Luckily you don’t have to look further than their FAQ:
Special note for users with Linksys WRT54G/GL/GS routers, there are severe problems with them when running any P2P app (read for fix)
There is lots of crap written – like use Thibor not DD-WRT and that latest versions of DD-WRT are cool. Just forget what it says and put mentioned script in your routers startup. Works like a charm!
- if you changed your admin username you still have to use “root” when logging through telnet
- drop to your command line and use command “telnet” or use PuTTY if you want to look cool in front of your girl/friend/mom
- don’t bother typing, just copy & paste this:
nvram set rc_startup="
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
echo 1 > /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses
echo '600 1800 120 60 120 120 10 60 30 120' > /proc/sys/net/ipv4/ip_conntrack_tcp_timeouts
- check after reboot with: (It should return “1”)
YMMV, yada, yada. Just come back and tell others if it worked 4 U 2.