strange network pause with ipfilter 4.1.19?

Hi All,

The network issue we are having probably is confined or caused by
ourselves, but I am wondering if anyone out there using Solaris 10
Update 3 with ipFilter 4.1.19 and latest ip_fil_solaris.c, ip_state.c
and pfil 2.1.12 patches seeing the same problem we are seeing. The
problem in question is, once in a while, our outgoing network traffic
will pause, and snooping the outgoing interface will show outgoing
traffic, but no incoming traffic. It seems like ipf is dropping them
all. The only way get the network traffic to resume is to ping our
network gateway.

Our ISP says the problem is on my end. Our pipe is fine. We have since
replaced the network cards in the Solaris box just in case it is a
hardware issue, but the problem persisted. Before the Update 3 and
ipFilter upgrade, we have no problem running ipfilter 4.1.16 on the
same hardware.

We are thinking about downgrade ipFilter to previous version. What
version of ipfilter do you recommend to use for Solaris 10 Update 3 in
production?

Thanks,

-- Sum