Well i use your latesed release, 

I have a problem with nat i think

because i use a cisco vpn client and i get the message 
Remote peer is no longer responding

Do not understand me wrong other thinks work well nomall acces to the net because i use no specific
filter just any to any
so should work for udp 500  on that port standard negotiation of the client

I can tell you i had same sort off problems with linux firewalls before.

Do you have any experiance in this or  a solution ?? 

Thanks in advance 

Eric