Route for DNSBL VIP through site to site OpenVPN tunnel
Something got my head scratching for a couple of days so I turn to the forum for help. I have 3 sites dial in to my main site with OpenVPN, all pfSense boxes. In order to simplify my administration load, I have all remote sites use the DNS Resolver of the main site. This works well for me and I can just keep an eye on everything in one place.
HOWEVER, I started using pfBlocker to do DNSBL stuff. What's got me stuck is routing responses from the VIP at the main site back to clients at the remote sites. If I SSH into a client at a remote site and attempt to ping 10.10.10.1, the ping arrives at 10.10.10.1 but the response is just routed out to a WAN instead of being routed through the tunnel back to the client.
I'm sure some jiggery pokery with the floating rule will fix this, but I haven't figured it out. Please help, this one is doing my head in.