IPFilter on Solaris

Hi, all.

I encountered such a problem.
Platform: SunOS  5.8 sparc SUNW,Sun-Fire-V210

While I replaced IPFilter 3.4.32 with a new  3.4.35, NIS doesn't work.
$id # or
$id <some_uid> hangs.

which cause ssh or some other app using NIS/NIS+ all hangs.

I tried with nisping to show all NIS servers and just proved that
they're all in allowed list.
both directions: in and out.

Then I started manipulating all rules, changing sequences, cut numbers.
But each time I update rules in file, remove all rules with
$ ipf -F a
and start with new rules in file
$ ipf -f myrules
For the first half an hour, everything works fine even including NIS.

Half an hour later, everything works except for NIS.
$ id # starts to hang again.

I even tried # pass out from any to any
# pass in from any to any

It just doesn't last longer than half an hour.

I tried google, but no output really helps.
some archives seems to have some description about the similar
problem, but I couldn't find an answer.

Any one familiar with this?