Department of Defense
High Performance Computing Modernization Program

(Note: As of June 15, 2022, the Internet Explorer (IE) 11 desktop application is no longer supported on certain versions of Windows 10, any version of Windows 11, or on later versions, as explained by this article. That article also describes ways to enable Internet Explorer mode in any version of Edge.)

To be certain that the IPv6 protocol will be used to access the website, substitute an IPv6 literal address surrounded by square brackets in the uniform resource identifier (URI) in place of a domain name.

For example, 



For additional information, refer to Request For Comments (RFC) 3986 "Uniform Resource Identifier (URI): Generic Syntax".

(Caution: This substitution can sometimes fail. Explanation of possible reasons for this are available. If you encounter problems, review the Broken User FAQ article found on that website for several possible explanations. For even more possible explanations, review this article on the ARIN IPv6 wiki.)

If it is necessary to specify a port number as part of the URI, it would follow the IPv6 literal address (as is the case with IPv4 addresses).

For example, becomes http://[2001:470:1:18::119]:443.

Note 1: Neither Edge nor IE can browse IPv6 websites if configured to use a proxy server that does not support IPv6. When Edge or IE is configured to use a proxy server, name resolution requests for websites are forwarded to the proxy server. Unless the proxy server is IPv6-enabled, proxy-based requests for local or remote IPv6 web pages will not work.

To disable use of a proxy server in any version of Windows:

1. Tap or click Internet Options in the Control Panel.

2. In the Internet Options dialog box, tap or click the Connections tab, then tap or click LAN Settings.

3. In the Local Area Network (LAN) Settings dialog box, clear the Use a proxy server for your LAN checkbox and tap or click OK.

4. Tap or click OK to save changes to Internet Options and exit.

To disable IE use of a proxy server:

Tap or click on the gear-wheel (Tools, Alt + X, ie-gear-wheel) in the upper right hand corner of the window, then tap or click Internet Options. Then perform steps 2 through 4 above.

To disable Edge use of a proxy server:

1. Tap or click on "Settings and more" (...) in the upper right hand corner of the window.
2. Scroll down and tap or click on "Settings".
3. Scroll down and tap or click on "View advanced settings"
4. Tap or click on "Open proxy settings" under "Proxy setup".
5. Set "Use setup script" and "Use a proxy server" to Off and exit Settings.

Note 2: If for some reason you need to use a Universal Naming Convention [UNC] path name that must include an IPv6 literal address to test access to a web page on a shared folder, be forewarned that the colon is an illegal character in a UNC path name. For just this reason, Microsoft has implemented a transcription algorithm that uses a second-level Internet domain, (The domain is registered to Perfect Privacy, LLC, but don't let that hinder you.) IPv6 addresses may be transcribed by substituting a dash for each colon and appending the domain, as follows:


would be written as

and the resulting URI will then be directly resolved by Microsoft software without DNS queries to any nameservers. When a zone index is part of a link local IPv6 address, substitute the letter "s" for the percent sign as follows:


would be written as

Note 3: Access to web pages on UNC path name-specified shared folders with an included IPv6 or IPv4 literal address is typically prohibited by Edge and most versions of IE unless the shared folder is explicitly added to the Trusted sites zone under the Security tab in the Internet Options dialog box.