Exchange will use 135 to discover (portmapper) and then use dynamically assigned ports for the actual conversations. Your best bet is to statically map the ports in Exchange and then you don't have a moving target from the firewall point of view. http://support.microsoft.com/default.aspx?scid=kb;EN-US;155831
http://support.microsoft.com/default.aspx?scid=kb%3ben-us%3b194952 The other option (not a good one IMHO) is to open 135 only to the Exchange host and then leave a range of ports open to that host as well. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 23, 2003 9:04 PM To: [EMAIL PROTECTED] Subject: Microsoft Exchange/UMS and Firewall [7:61747] Hi All, Need your advice on the following situation: I have a Active Voice Unified Messaging System on Location A, and a Microsoft Exchange Server at Location B. Both Location A and B are protected by Checkpoint firewall. Please advice how the firewall be configured such that it will allow MAPI to be used between these two sites. Thanks a lot in advance! Maurice Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=61780&t=61747 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
