[strongSwan] Problem connecting to a Cisco Unity gateway

[Tobias Brunner]

Hi Bas,

> My question now is to which interface should I attach 172.16.48.17?

It doesn't really matter.  If you don't actually suffer from #197 [1],
i.e. if you use strongSwan 5.0.1 or newer, you can add it to `lo`.
Adding it to eth0 does work too, that's what strongSwan does by default
when it installs virtual IPs it gets assigned dynamically from other
peers [2].  Routers on the Internet won't route packets with that
destination address to your host so it doesn't make much of a difference
if you install it on an interface connected to it or not.

Regards,
Tobias

[1] https://wiki.strongswan.org/issues/197
[2] https://wiki.strongswan.org/projects/strongswan/wiki/VirtualIp