You could try and use dce-rpc entries under services, this contains entries for Exchange and goes on uuid instead of port number
-----Original Message----- From: Mailing list for discussion of Firewall-1 [mailto:[EMAIL PROTECTED] Behalf Of Brett, Gary Sent: 10 March 2004 13:05 To: [EMAIL PROTECTED] Subject: Re: [FW-1] SecureClient - Outlook and Exhange Thanks NA, so what youre saying is, the tcp 1053 and tcp 1068 that I keep getting are RANDOM ports and will inevitably change at some point to other random ports ? If thats the case then I am shocked that microsoft have designed it like this, and they wonder why there mail products are subject to so much hacking ! -----Original Message----- From: Not Available [mailto:[EMAIL PROTECTED] Sent: 10 March 2004 12:52 To: [EMAIL PROTECTED] Subject: Re: [FW-1] SecureClient - Outlook and Exhange Well, try sniffing the traffic between client (outlook) and server (exchange) and you will discovre in horror what RPC is. There are two main "flavors" of RPC: the UNIX (named RPC) and the Windows (DCE-RPC). The basic idea is the same: use a fixed port (111/UDP and 111/TCP for UNIX, 135/TCP for Windows) to negotiate a random, high port onto which perform the true data connection. Yes, RANDOM port. Checkpoint somehow handles RPC and DCE-RPC, but I have NEVER been able to set it up reliably. In those cases, I'd rather stick to "any". For the naming resolution of services, Checkpoint uses its internal database as well as the /etc/services file. Hope this helps NA ----- Original Message ----- From: "Brett, Gary" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, March 10, 2004 12:56 PM Subject: [FW-1] SecureClient - Outlook and Exhange > Hi there > > I am attempting to get outlook 2000 clients connecting to a exchange 5.5 > server over SecureClient (NG FP3). If i create an outbound `Desktop Policy` > rule that says - - > > [EMAIL PROTECTED] ---> Exchange_box_internal_address - Service=Any > > ...then every thing works no problem at all. But I have been asked to get > rid of rules with "Any" in the service column and lock it down to the > required tcp/udp ports/services only. > > Has anybody configured this to work already? if so which ports do i need to > keep open to get this working, so far i have > > tcp 135 > tcp 1053 > tcp 1068 > > Can anyone think of any more that outlook potentially might want to use ? > > PS: Why, when TCP-135 appears in the log, it resolves to the name "epmap" > but when i look in services listing in NG there is no "epmap" or in fact no > service at all for TCP-135 ???, im very confused by this, I want to add the > service to a rule but it doesnt exist , but it does ..! if you see what i > mean. Would i have to create the service and call it something else ?? > > any help would be greatly appreciated > > Cheers > Gary > This electronic message contains information from Halifax Cetelem Credit Ltd > which may be privileged or confidential. 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