[strongSwan] Access to gateway & firewall

[mail at rsmogura.net]

Hello,

I have configured road warrior gateway with IKEv2 everything works 
almost fine. I would like to have access to some services on gateway and 
secure those with Firewall.

I have configured gateway as follow
eth0 - public IP
dummy0 - virtual IPv6 address

Problem over here is that when I turn on firewall packets are rejected 
because origin of (decrypted) packets is eth0. Is there any possibility 
to route VPN traffic via dummy0, so firewall will see those as comming 
from dummy0?

Server has Open Suse, with limited support to firewall. Strong swan 
version is strongSwan U4.5.3/K3.1.0-1.2-default

Regards,
Radek