ping problems

[Erez D]

hi

i have an openwrt (linux) router, with regular firewall rules (nat,
related+established,clamp-mss-to-pmtu, etc).

if i ping from the router to the internet, it works ok
however if i ping from inside my lan to the internet, the first 30-70 pings
works, then it stops working (i.e. 100% packet lost after the first 30-70)
using tcpdump inside my router shows the icmps going through the wan
interface but none come back.

any idea ?
erez.
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