MultiWan - IP Spoofing errors
Hopefully this will make sense and someone may have an idea before I open a case.
I have 2 separate ISP connections. ISP A(General Internet/GINET) and ISP B(MAIL)
I have the firewall setup as follows
Eth0 - ExtMail (ISP B - Mail) - Direct internet connection
Eth1 - ExtINET (ISP A - GINET) - Have to use their modem/router/ap(for wifi) combo
Eth0 is setup as static IP from ISP B
Eth1 is setup as Dynamic IP from ISP A, which is configured using Advanced DMZ on their modem, have to do it this way to get external IP on the firewall on Eth1
All is working as intended,
I have general Internet going in/out on Eth1/ISP A
Mail flow is going in and out on Eth0/ISP B as expected.
The ip spoofing messages happen when I try to access our mail server on ISP B from ISP A. they are using wifi from the ISP A modem/router/ap