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SonicWALL: Webserver on DMZ cannot access DB Server on LAN

I am configuring a SonicWALL NSA 2400 firewall with SonicOS Enhanced 5.x. Everything works just great except for one problem: the webserver on our DMZ needs to access a db server on the LAN, and simply will not do so.

I've followed all instructions, double-checked all entries, and attempted to work with SonicWALL support (they were completely stumped).

We have a single T1 static IP address, so the DMZ is NATted.

I'm missing something. But what?

P.S. The client wants to replace IPCop, which is working perfectly except for the fact that it won't do T1 failover or load balancing.
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1 Solution
You must have created a rule from DMZ->LAN; what is the priority of the rule; have you tried moving the rule up; may be some other less restrictive up in the order is causing the issue.

Please check and update.

Thank you.
michaelknowlesAuthor Commented:
I will double-check the DMZ->LAN rule priority and report back tomorrow.

michaelknowlesAuthor Commented:
This is part of the problem. I think there is a bigger issue, having to do with the DMZ server as well. Your suggestion has cleared up part of the problem, but I have more work to do. Thanks for pointing me in the right direction.

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