Intranet site is identified as an Internet site when you use an FQDN or an IP address
When you access a local area network (LAN), an intranet share, or an intranet Web site by using an Internet Protocol (IP) address or a fully qualified domain name (FQDN), the share or Web site may be identified as in the Internet zone instead of in the Local intranet zone. For example, this behavior may occur if you access shares or Web sites with Microsoft Internet Explorer or Windows Internet Explorer, with Microsoft Windows Explorer, with a command prompt, or with a Windows-based program when you use an address in any one of the following formats:
* \\Computer.childdomain.domain.com\Share
* http://computer.childdomain.domain.com
* \\157.54.100.101\share
* file://157.54.100.101/share
* http://157.54.100.101
This behavior can occur regardless of whether any or all of the following settings are configured:
* In Microsoft Internet Explorer or in Windows Internet Explorer, you have added the FQDN (or *.domain.com) or the IP address (or the address range) to the Do not use proxy server for addresses beginning with box under the Exceptions section in the Proxy Settings dialog box.
Note To locate the Proxy Settings dialog box in Internet Explorer, click Tools, click Internet Options, click Connections, and then click Proxy Settings.
* You have selected the Bypass proxy server for local addresses check box that is on the Local Area Network (LAN) Settings dialog box.
Note To locate the Local Area Network (LAN) Settings dialog box in Internet Explorer, click Tools, click Internet Options, click Connections, and then click Local Area Network (LAN) Settings.
* You have selected the Include all sites that bypass the proxy server and Include all network paths (UNCs) check boxes on the Local intranet dialog box.
To locate the Local intranet dialog box in Internet Explorer, click Tools, click Internet Options, click Security, and then click Local intranet.
This behavior can cause Internet Explorer to prompt you for credentials when you access the intranet Web sites that require authentication. Or you may be prompted or prevented from opening files on an intranet Web site or Universal Naming Convention (UNC) share in programs that use the Internet Explorer Security Manager to determine whether a file is located in a trusted security zone. For example, you may receive the following error message when you try to open a Microsoft Access database (.mdb) file on a local intranet share (by using the FQDN or IP address) with Microsoft Access 2002:
