I seem to have a similar problem to earlier threads about l2tp/ipsec

The setup is like this.
Laptop with XPSP2 and built in VPN client
Monowall doing nat for an adsl line
Cisco VPN 3000 connected to the Internet

The vpn traffic just should pass the mono.
I have created an 5 star rule, allow anything going anywhere on one of the
internal interfaces. (I got one for cat5 and for wireless)
Still i get a log entry claming it has blocked udp from that interface
going to my companys VPN 3000
Is this a bug/feture in mono or me?