Second IP on WAN connection for VPN with Sonicwall
Posted on 2017-10-12
I have an office with a single internet connection and they are running a Sonicwall NSA220. The connection comes in on a single CAT6 cable through the wall (no DSL or cable "modem").
My IPs are xxx.xxx.xxx.10 and xxx.xxx.xxx.15. I have .10 configured on interface X1. It is used in a site-to-site VPN. I'd also like to use .15 in the same site-to-site VPN. Yes, I know this is weird, but it this case, .10 is blocked (for now) by the Chinese firewall. So I'd like to have both .10 and .15 used in the same site-to-site connection.
I don't think I can do the normal procedure for handling second IPs by NAT'ing them, since I don't know where to NAT them to. Obviously I cannot have this second connection come through to X2 or X3. I can't seem to create a virtual sub-interface under X1 since the IPs are in the same subnet.
What can I do?