Microsoft KB Archive/256132
Article ID: 256132
Article Last Modified on 2/26/2007
- Microsoft Commercial Internet System 2.0
- Microsoft Exchange 2000 Server Standard Edition
This article was previously published under Q256132
After you install additional virtual servers for the Simple Mail Transfer Protocol (SMTP), Post Office Protocol version 3 (POP3), or Internet Message Access Protocol Version 4rev1 (IMAP4) services in Exchange 2000 Server or Microsoft Commercial Internet System, the virtual servers that you added do not start. You may receive the following message:
One of the following error messages may be logged in the application event log:
This issue can occur because the Transmission Control Protocol/Internet Protocol (TCP/IP) suite of utilities, which includes the SMTP, POP3, and IMAP4 protocols, requires a unique socket for each instance. A TCP/IP socket is composed of an Internet Protocol (IP) address and Transmission Control Protocol (TCP) port pair. To generate a unique socket, either the TCP port or IP address of each instance must be unique to the given virtual server.
To resolve this issue:
- Provide a unique IP address for each virtual server. To do this, either add multiple network interface cards, each with a unique IP address, or add multiple IP addresses to a single network interface card.
- Configure the virtual server to use a specific IP address, rather than using the "all unassigned" setting:
- Start the Microsoft Management Console (MMC) for the Microsoft Internet Information Service (IIS), or the Microsoft Exchange 2000 System Manager.
- Select the virtual server and open the properties of the server.
- Click the General tab, and select a specific IP address in the IP address box.
It is impractical to change the ports for these services under normal usage. These ports are defined in various Request for Comments (RFCs) for these services. Any change to these ports will have a negative effect on the interoperability of Exchange 2000 and Microsoft Commercial Internet System with other Internet standards-based applications.
Additional query words: exch2kp2w mcis
Keywords: kbprb KB256132