Alternate port numbers cannot be specified at setup time, but can be configured afterwards. If you use a custom Web site, WSUS listens on port 8530. If you set up WSUS on the default Web site, WSUS listens for Automatic Updates on port 80. If there are no Web sites running on the server where you install WSUS, you can use the default Web site or a custom Web site. Automatic Updates must use the port assigned to the WSUS Web site in Microsoft Internet Information Services (IIS). Chaining WSUS servers together is discussed later in this guide.Īutomatic Updates is the client component of WSUS. You can configure multiple WSUS servers to synchronize with a parent WSUS server. If you are planning to use custom ports for this communication, you will have to open those ports instead. If there is a corporate firewall between your network and the Internet, you will have to open these ports on the server that communicates directly to Microsoft Update. All synchronizations after that should be significantly shorter.īy default, the WSUS server uses port 80 for HTTP protocol and port 443 for HTTPS protocol to obtain updates from Microsoft. Initial synchronization can take over an hour.
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