Check out the following M$ support article: http://support.microsoft.com/default.aspx?scid=kb;en-us;155831
It refers to Exchange 5.5 but also applies to other version of Exchange. XCCC: Setting TCP/IP Ports for Exchange and Outlook Client Connections Through a Firewall Gerson On 5/20/05, Hui, Kiat (Contractor) <[EMAIL PROTECTED]> wrote: > Hey all, > > We are running Exchange 2000/Outlook 2000 in Corporate/Workgroup Mode. The > Exchange servers are outside the NG FP3 and the Outlook clients are all > inside. > > I have setup a rule to allow the internal network to access the Exchange > servers using the "MSExchange" built-in Group under "Services". The logs > promptly fill up with each client connecting to the Exchange server using > 135/tcp and then some random tcp-port. Life is good. > > However, I then see a whole bunch of denied connections from the Exchange > server to the Outlook clients on random udp ports. I am puzzled: Isn't the > return communication supposed to be in the same state as the outbound > traffic? Why are these connections being denied? Do I have to setup another > rule that basically allows the Exchange servers to communicate on all high > ports (>1024) to the Outlook clients? > > Without hard-coding the Exchange servers to talk back in a narrow range of > ports (we don't have access to those servers), how have you guys been able to > enable this Exchange-Outlook communication through the FW1? > > Thanks! > -Kiat > > ================================================= > To set vacation, Out-Of-Office, or away messages, > send an email to [EMAIL PROTECTED] > in the BODY of the email add: > set fw-1-mailinglist nomail > ================================================= > To unsubscribe from this mailing list, > please see the instructions at > http://www.checkpoint.com/services/mailing.html > ================================================= > If you have any questions on how to change your > subscription options, email > [EMAIL PROTECTED] > ================================================= > ================================================= To set vacation, Out-Of-Office, or away messages, send an email to [EMAIL PROTECTED] in the BODY of the email add: set fw-1-mailinglist nomail ================================================= To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ================================================= If you have any questions on how to change your subscription options, email [EMAIL PROTECTED] =================================================
