I have a DSTNAT rule to forward inbound SMTP to the exchange server behind the mikrotik. When the PPTP client isn’t established, the forwarding works and the outside smtp sender can connect and get ehlo response. When the VPN tunnel is connected and the default route gets put in place to forward traffic over the VPN (VperVPN), SMTP stops ack’ing and no SMTP functions work from outside. As if the SMTP responses are getting channeled over the new default route.
Ideas on how I can use the default route to have semi-secure browsing over VPN but not conflict with receiving/sending SMTP traffic from non-vpn interface?
Thanks,
-D