Hi
I finally got ip_conntrack_sip features backported and functionnal on openwrt.
The patch is available here (should be applied as number 317, as its name explains)
http://openwrt.alphacore.net/patches/bu … er-nat-sip
It provides some modifications to the ip_conntrack.o module in order to handle SIP connection tracking, and also the following two modules : ip_nat_sip.o and ip_conntrack_sip.o
Don't know if it is really useful, but well it's just another patch