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Article 40

From:   
Date: 07 Nov 2006
Time: 21:15:05 -0500

The ports for Exchange Front-end Server in DMZ

To setup Exchange Front-end Server in DMZ, we have to open the following ports:

For Exchange Communication:
- Port 80 for HTTP
- Port 691 for Link State Algorithm routing protocol
For Active Directory communication:
- Port 389 for LDAP (TCP and UDP)
- Port 3268 for Global Catalog Server LDAP (TCP)
- Port 88 for Kerberos Authentication (TCP and UDP)
To connect to the DC and GC you want by editing the server properties in Exchange System Manager.
- For DNS communication:
  - Port 53 for DNS (TCP and UDP)
- For RPC communication:
  - Port 135 – RPC endpoint mapper (TCP)
  - Ports 1024 and higher for RPC services

If you are using IPSec connecting Frontend- and Backend Servers you have to open: