Take a look at Tom's article here: http://www.isaserver.org/articles/2004dmzfebe.html He goes into some pretty deep detail and although you may not be using ISA server, you should still be able to find information about the different traffic types in there. DM -----Original Message----- From: AlecBaldwin [mailto:chengsh@xxxxxxxxxxx] Sent: Sunday, January 22, 2006 7:51 PM To: [ExchangeList] Subject: [exchangelist] Firewall ports to open for W2k3 Exchange FE talks to BE and DC http://www.MSExchange.org/ Hi all, What are those ports have to be opened for the firewall sandwiched between FE in DMZ and BE and DC/GC in Intranet network? ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp ------------------------------------------------------ Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: devin@xxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to info@xxxxxxxxxxxxxx