Ports numbers used for mapi trough firewall

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From: Arjen (al.wark_at_gw.rotterdam.nl)
Date: 11/17/04 

Date: 17 Nov 2004 03:10:23 -0800

We have here a W2k domain with users, and another, W2k3 domain with
Exchange 2003 mailboxes. These domains have a single trust
relationship. Between the two domains there is a firewall.

I want my outlook XP on the W2k clients to connect to the Exchange
server in the W2k3 domain. I have set all the ports as mentioned in KB
q270836, and it looks like it's working. But every time I get the
"Outlook is getting mail messages" popup box. When I allow all traffic
trough the firewall (any-any, can now be done in test env.) I don't get
this message. The portnumbers used except the static ports are: 1026
(when accessing public folders) From DC to DC, 16419 from PC to E2k3
server and port 55809 from PC to E2k3 server.

Anyone who knows where these ports are used for and how I can make
these static?

Thanx in advance...

Relevant Pages

  • Re: What ports to open on firewall?
    ... Internet to Marshall and Exchange should talk with DNS server that it uses. ... Internet should be opened, if DNS Server is external, then DNS ports to DNS ...
    (microsoft.public.exchange.admin)
  • Re: What ports to open on firewall?
    ... In my LAN-->WAN, all outgoing ports are open, my exchange server is in my LAN which we use internal DNS servers. ... My issue is when I NAT, I need to know what ports to I need to NAT so the receippient server can reverse lookup, validate sender... ...
    (microsoft.public.exchange.admin)
  • Re: How to access exchange through a firewall?
    ... The SBS server was an afterthought I suppose, ... There is no "bunch of ports" required.... ... Exchange isn't constantly grabbing them from their hosting provider I ... Don't know what you mean by the users POP connectors - there's one POP ...
    (microsoft.public.exchange.admin)
  • Exchange 2003 and Mapi trough firewall
    ... I want my outlook XP on the W2k clients to connect to the Exchange ... server in the W2k3 domain. ... I have set all the ports as mentioned in KB ...
    (microsoft.public.exchange.connectivity)
  • Set static port mappings on Exchange 2003 server; now VPN clients cannot use Outlook XP from offsite
    ... We are running Exchange 2000 on a Windows 2000 server that is the Global ... server on ports 1273 and 5000. ... When they click on the "Check Name" button, Outlook ...
    (microsoft.public.outlook.general)