From: Chesterfield, UK
I'm trying to publish an Exchange 5.5 server through an ISA server. I've used the Mail publishing wizard and got SMTP working OK, but what I'd really like to do is connect an Outlook client from the Internet through the ISA server to the internal Exchange Server. I realise that RPC is not very secure, I'll work on the VPN when I've got more time.
Outlook looks like the initial connection is working but then I get a time out on accessing the Global Address List. The logs are not showing any blocked connections from the Outlook client I can't workout what's going on. Has anyone got any ideas?
From: London, UK
Can't remember what ports RPC runs on but I know Microsoft have papers on them. The easiest way to test it is to open all inbound and outbound packet filters and protocol rules and see if it works. If it doesn't I assume you will need Lars' fix.
As you say this is an incredibly dangerous way of doing things as trashing your server through RPC is very easy. Definately go VPN.