Outlook 2003 client on XP (SP2) laptop configured to use RPC over HTTP (ROH) can connect to Exchange Server 2003 only when logged in to LAN network but cannot connect from Internet when off site at remote locations. (I assume Outlook's Exchange mailbox access from LAN is verification the config of ROH is correct on both the Exchange 2003 Server & the Outlook 2003 client?)
The goal here is to make Exchange 2003 mailboxes located on internal LAN available to staff from off site locations connecting through Internet. (I read another ExEx solution saying this is possible).
1. Added STATIC command to PIX515e FW to translate a public GLOBAL IP (209.43.X.X) to the internal LOCAL IP of Exchange 2003 Server (192.168.0.196)
2. Modified ACL on outside interface of PIX to allow WWW & HTTPS traffic from any source to the GLOBAL IP of Exchange Server defined in STATIC command (209.43.X.X)
3. Modified ACL on outside interface of Cisco 1720 perimeter router to allow WWW & HTTPS traffic from any source to the GLOBAL IP of Exchange Server defined in PIX STATIC command (209.43.X.X)
4. [When off site at remote location] added entry to HOSTS file on laptop mapping Exchange Server to GLOBAL IP (209.43.X.X cptexc2003.mydomain.org #Exchange Server On LAN)
When Outlook 2003 is launched on laptop from off site location a Windows logon dialog box appears to authenticate the connection to Exchange (cptexc2003.mydomain.org) but it never connects. (Doesn't this prove the http traffic is getting through the perimeter router & the PIX firewall and reaching the Exchange 2003 Server?)
Any thoughts on what I should check next or how I can troubleshoot further? (I thought ROH was pretty straightforward?)