two sites connected ip sec vpn tunnel. site A has 16 static ip addresses for outside to in access (NAT). can I route one of my public ip addresses from site A across vpn tunnel to a host on site B?
You can advertise any of your networks (individual IPv4 addresses can be advertised as
/32 networks) across the tunnel, assuming you are running a routing protocol with the router on the other end of the tunnel. It is routing protocols that advertise your networks. Routers learn routes in three ways:
- Directly connected networks
- Statically configured routes
- Through dynamic routing protocols
Since the router on the other end of the tunnel is not directly connected to your network, option 1 is out.
The router on the other end of the tunnel could be statically configured with the network.
You could run a routing protocol with the router on the other end of the network and advertise any or all networks you have.