Internet Trouble Shooting — Common Browsing Errors

404 Not Found
This error occurs when the requested Web page is not found on the host's server. This is one of the most common browsing errors, as it can easily be produced by entering a Web address incorrectly or by following an outdated bookmark. The best course of action is to try visiting the Web site without entering extended address information. If the content was simply moved to a different location on the site, you may be able to find the new location from the site's home page.

For example, if you entered the Web site address http://www.example.com/browsers/test123.htm and you received a 404 error, you could try entering http://www.example.com/ instead to see if you can find the information you are looking for from the site's home page.

401 Unauthorized
You will see this error in cases where the web server is expecting some sort of authentication information, such as Username and Password. If the server does not receive this authentication, it may produce a 401 error. You can click the Refresh button to see if the browser will refresh the page and prompt you for a username and password. If not, you may need to contact the site's administrator to find a solution.

403 Forbidden
This error occurs when you do not have permission to view the content. This message usually means that the server's administrator has protected the content so that it cannot be viewed by the public. If you feel you are mistakenly receiving the message, you may need to contact the site's administrator to discuss your permissions.

500 Internal Error
This error usually means there is a technical problem with the server itself. The best course of action is to notify the site's administrator.

Network Connection Was Refused By Server
This is a fairly uncommon error that can occur if the server is currently overworked and is unable to handle any more visitors. Try refreshing the page a few times to see if you can connect with the server. If you are still unable to connect, try again later. If the problem persists, you may also want to contact the site's administrator.

Unable To Locate Host
Usually this error means that there is some type of connection problem between your computer and the server that is hosting the site. This can be caused by several conditions, such as an invalid domain name or a network failure. To find out more about this problem, try visiting a few other Web sites. If you encounter the same error message, there may be a problem with your Dial-Up or broadband connection. If you are able to connect to other sites, then there is likely some type of connection problem with the site from which you're receiving the error. If possible, contact the site's administrator.