We've had a hardware failure of our spam box and while it is down I want to forward email directly to the email servers. For most I just created a new rule in my sonicwall to send it directly to the email server which is on our lan. One of the email servers is on the other end of a vpn.
The vpn is between my sonicwall tz205 and a tz105. The tunnel is up and working fine. On my lan if I telnet across the vpn to the email server it works just fine but I cannot get the sonicwall to do it. It seems like a pretty simple idea.
I searched google and found a couple of resources for doing this and followed them step by step but it doesn't work for me. There must be a simple way to tell the sonic wall to just forward the mail coming from one external IP address to an IP address on the vpn but I can't seem to find it.
I just need to skip the box. For this mail server I tried changing the IP address of the address object for the server to send it to the mail server instead of the spam box but it didn't work. I edited the address object a second time and changed it from the lan zone to the vpn zone but it still didn't work.
I think the issue is I have to allow traffic from the wan to the vpn as well but I'm not sure how to do this for just the Wan IP address I need.