Intranet site is identified as an Internet site

Published on 11/23/2006

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 .

1. In Internet Explorer, click Tools, and then click Internet Options.
2. On the Security tab, click Local intranet, and then click Sites.
3. Click Advanced, and then type: *.domain.com or an IP address range (for example, 157.54.100-200.*) in the Add this Web site to the zone box, where domain.com is your company and top-level domain names.
4. Click Add, click OK, click OK, and then click OK again to close the Internet Options dialog box.
5. Restart the computer.

Details: http://support.microsoft.com/kb/303650/en-us?spid=2073&sid=global