I have created a tunnel between two location of our company using a Sonic Wall TZ at our corporate location and a SOnic Wall SOHO3 at our Satelittle location. The tunnel seems to work fine at the satelitte location when I plug the Sonic Wall LAN port directly into a single PC. When I do this everything passes fine and works. I can get an IP address, get out to the internet, remotoe desktop into other machines.
However, when I plug the SOnic Wall into a switch nothing will work. Checking the logs in the Sonic Wall I get this IP Spoofing error.
"IP spoof detected on packet to Central Gateway, packet dropped"
I've tried all kinds of solutions like using a cross-over cable from the Sonic Wall to the switch, created numerous rules but I must being doing something wrong at some point. Has anyone come accross this issue? Thanks.