Ports used by SBS2k3

 Table A: Ports that Enable Remote Access to SBS Services
      TCP Port Service Description
      21 FTP Enables external and internal file transfer
      25 Exchange Server Enables incoming and outgoing SMTP mail
      80 (
http://) IIS Enables all nonsecure browser access, including:
internal access to IIS Webs including the company Web, Windows SharePoint
Web, Windows SharePoint administration Web, and server monitoring and usage
reports Enables internal access to Exchange by OWA and OMA clients
      110 POP3 Enables Exchange to accept incoming POP3 mail
      123 (UDP port) NTP Enables the system to synchronize time with an
external Network Time Protocol (NTP) server
      143 IMAP4 Enables Exchange to accept incoming IMAP4-compliant messages
      220 IMAP3 Enables Exchange to accept incoming IMAP3-compliant messages
      443 (
https://) Outlook Enables all secure browser access, including
external access to Exchange for Outlook 2003, OWA, and OMA clients; required
for external access to server monitoring and usage reports
      444 Windows Share Point Services Enables internal and external access
to the SharePoint Web
      500 IPSec Enables external VPN connections by using IPSec
      1701 L2TP clients Enables external L2TP VPN connections
      1723 PPTP clients Enables external PPTP VPN connections
      3389 Terminal Services Enables internal and external Terminal Services
client connections
      4125 (Note: you can change this port in RRAS) Remote Web Workplace
Enables external OWA access to Exchange, plus internal and external HTTPS
access to the client Web site
      4500 IPSec Internet Key Exchange (IKE) Network Address Translation
(NAT) traversal

One Thought on “Ports used by SBS2k3

  1. Hi:

    I have opened all of the above ports but still I can’t access my exchange server which is running on SBS2003 using Outlook 2003.

    can any one please help.

    my email id nishrags@hotmail.com

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