Geeks: RPC over NAT Qustion.

Is is at all possible? Mayber an application level firewall.

Specifically Outlook clients to an Exchange server through a masquerading firewall doesn’t work.

MS say that ISA server will do it by ‘publishing’ the exchange server. Don’t have the time or inclination to install ISA server.

Looking for a cheaper -hopefully - fix.

Any ideas?

Maybe I’m missing something, but I have used MS Outlook to connect to an MS Exchange Server across both NAT and NAPT, although not specifically across a device running IP masquerading (but I don’t see why that should make any difference).

And no, you shouldn’t have to “publish” the server via ISA in order to establish such a connection (in fact, I’m quite sure, you won’t be connecting directly to the Exchange server in that case, but only to web front end).

I’m not aware of any issues between RPC and NAT. I can’t claim a definitive answer here, but at least this will serve to bump it.

Cheers for the reply AZCowboy

Here’s a link to MS’s decription of how to publish an exchange server through ISA. I think the reason for doing it their way is so you don’t have to tie down the Exchange server ports.

And here’s a link to MS’s description of the problem;EN-US;Q238390&

They suggest a ‘one-to-one’ translation. I’ve no idea what the mean by this though. I did open port 135 on the firewall, and the two ports we’d set on the exchange server, and did tell the firewall to redirect incoming packets for those ports to the exchange server, but nothing.

I’ve decided to go the OWA route, but I’d love to know how you got it to work. It’s bugging the heck out of me.