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How to Configure Outbound Access for Detection of Open Proxy Servers for Sender Reputation

 

Applies to: Exchange Server 2007 SP3, Exchange Server 2007 SP2, Exchange Server 2007 SP1, Exchange Server 2007

Topic Last Modified: 2006-09-18

This topic explains how to use the Exchange Management Shell to configure outbound access for the detection of open proxy servers for sender reputation.

If you have enabled the detection of open proxy servers on sender reputation, you may have to perform additional configuration to enable sender reputation to traverse any firewalls that are between the Edge Transport server and the Internet. If you have a firewall or firewalls that are between the Edge Transport server and the Internet, you must verify that specific outbound ports are open.

You must complete the following configuration tasks:

  • Open outbound ports on any firewalls that are between the Edge Transport server and the Internet.
  • Configure sender reputation to use a specific proxy server.

If your organization uses a proxy server to manage outbound traffic through a firewall, you must configure sender reputation to use the proxy server. Sender reputation must have outbound connectivity to the Internet to detect open proxy servers. You must specify the proxy server name, type, and port number that sender reputation will use to access the Internet.

The open proxy detection test uses many protocols to test for open proxy servers. The following table lists the ports that must be opened outbound for sender reputation.

Ports that must be opened outbound

Protocols Ports

SOCKS4, SOCKS5

1081, 1080

Wingate, Telnet, Cisco

23

HTTP CONNECT, HTTP POST

6588, 3128, 80

To perform the following procedures on a computer that has the Edge Transport server role installed, you must log on by using an account that is a member of the local Administrators group on that computer.

Also, before you perform these procedures, confirm the following:

To successfully configure sender reputation to detect open proxy servers, you must provide the following information:

  • The name of your organization's proxy server.
  • The port number for your organization's proxy server.
  • The type of proxy server that your organization runs.
  • Run the following command:

    Set-SenderReputationConfig -ProxyServerName <String> -ProxyServerPort <Int32> -ProxyServerType <String>
    

    For example, to configure sender reputation to use the open proxy server, SERVER01 that uses an HTTP CONNECT protocol type with 80 as its server port, run the following command:

    Set-SenderReputationConfig - ProxyServerName SERVER01 -ProxyServerPort 80 -ProxyServerType HttpConnect
    

For detailed syntax and parameter information, see Set-SenderReputationConfig.

To ensure that you are reading the most up-to-date information and to find additional Exchange Server 2007 documentation, visit the Exchange Server TechCenter.
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