ipf - freebsd 5.x and 6.x hangs

[Todor Dragnev]

Hello,

Yesterday, when I looking for solution that can replace following command from 
linux: 

ip route add default via x.x.x.x src y.y.y.y

So I tried with ipf and execute following rule, (yes this is silly):

--
pass out quick on rl0 to rl0:y.y.y.y from x.x.x.x to any keep state
--

On rl0 I have 2 IP addresses: x.x.x.x and alias for y.y.y.y

All freebsd boxes hangs after 20 seconds whitout notice.