504

If the page has been deleted from the server or it is not currently available you can try to get an achived copy. If you used a link from a search engine, you might be able to get some information by using the "cached" option.

You can also try viewing the site or page from an archive such as the WaybackMachine.

Most archives and cached versions only retains the site text. Graphics and other media objects are linked to the orignal site and may or may not be available.

You can try to access the site again at a later time when the server issue has been corrected.

You might notify the webmaster about the issue. Include the error number and the address (URL) where the error occurred along with any other relevant details.

Many sites use an email address in the form webmaster@sitename.com where you replace sitename.com with the web sites address (don't include a www). Keep in mind with the amount of spam, they may use a different address and/or it might get ignored. Check the websites' contact information to get reliable contact information.

The server, while acting as a gateway or proxy, did not receive a timely response from the upstream server specified by the URI (e.g. HTTP, FTP, LDAP) or some other auxiliary server (e.g. DNS) it needed to access in attempting to complete the request.

Note: Note to implementers: some deployed proxies are known to return 400 or 500 when DNS lookups time out.

Check out what others say about this issue and review or add your own comments and solutions!