Add or Edit Site Binding Dialog Box

Applies To: Windows 7, Windows Server 2008, Windows Server 2008 R2, Windows Vista

Use the Add Site Binding and the Edit Site Binding dialog boxes to add bindings to a site or to edit an existing site binding.

UI Element List

Element Name Description


Select FTP if you want the site to have an FTP binding, or select HTTP or HTTPS if you want the site to have a Web binding.

IP address

Select an IP address from the IP address list or type an IP address that users can use to access this site.

The percent symbol (%) is not a valid character for IP addresses. If you type an IPv6 address that includes this character, Windows Process Activation Service (WAS) will be unable to start the site because this invalidates the binding. For example, the link-local IPv6 address ends with "%8". If you copy this address from an ipconfig query in a Command Prompt window and paste it into the IP address box in IIS Manager, make sure to remove the "%8" part of the IP address.

If you select All Unassigned, this site will respond to requests for all IP addresses on the port and optional host name that you specify for this site, unless another site on the server has a binding on the same port that uses a specific IP address.

For example, the Default FTP Site binding specifies All Unassigned for IP address, 21 for Port, and no host name. If the server has a second FTP site called Contoso with a binding that specifies for IP address on port 21 and no host name, Contoso will receive all FTP requests to port 21 on IP address, and Default FTP Site will continue to receive FTP requests to port 21 on any IP address other than


Type the port on which the FTP service must listen for requests made to this site. If you select FTP from the Type drop-down list, the default port is 21; if you select HTTP from the drop-down list, the default port is 80; if you select HTTPS from the drop-down list, the default port is 443. If you specify a port different from the default ports, clients must specify the port number in requests to the server or they will not connect to the site.

Host name

Enter a host name if you want to assign one or more host names, also known as domain names, to a single IP address. If you specify a host name, clients must use the host name to access the site.

If this FTP site is available on the Internet, type the domain name of the FTP site as users will type it in a browser, for example, If your site has more than one domain name, such as and, you must create a separate binding for each host name.

If your FTP site is available on an intranet, you do not have to specify a host name if users will type the server name in an FTP client, for example, ftp://server_name. However, if the DNS server in your environment is configured to store other names for this FTP server, you can create a separate binding for each host name so that users can use the other names stored by the DNS server.


FTP clients must either use either the FTP HOST command when they connect, or they must use the host name when they specify their USER credentials. For example, a user would type HOST or USER|administrator.

SSL certificate

Select the certificate that you want the site to use for HTTPS. The SSL certificate list appears only when you select HTTPS from the Type list.


SSL certificates for FTP connections are specified by using the FTP SSL Settings page.


Opens the Certificate dialog box from which you can view information about the selected certificate in the SSL certificate list. The View button appears only when you select HTTPS from the Type list and select a certificate from the SSL certificate list.