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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:

• Port 500 for IKE (UDP)
• Port 51 for Authentication Header (AH)
• Port 50 for Encapsulation Protocol (ESP)

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Last changed: 09/04/08