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407
Proxy Authentication Required
Description
Likely a username or password given was not valid. In essence the web server could not verify you are the correct individual.
Example
Proxy Authentication Required
You must be authenticated by a proxy server before the Web server can execute your request.
Web Server at ...
Error messages will differ depending on the web server and if replaced by the web site designers.
Occurrences
Frequency is relative to other Internet warnings and errors.
Solutions and Fixes
Use Correct Information
10
Enter a correct username and password. Remember that most passwords are case-senstive.
FaultWire Staff Posted: 8-Oct-2008
Update Browser
7
A very old browser might cause this issue. If you are using a old browser consider an upgrade to something current to fix this. Old browsers are also a major security concern.
This code is similar to 401 (Unauthorized), but indicates that the client must first authenticate itself with the proxy. The proxy MUST return a Proxy-Authenticate header field (Section 14.33) containing a challenge applicable to the proxy for the requested resource. The client MAY repeat the request with a suitable Proxy-Authorization header field (Section 14.34). HTTP access authentication is explained in "HTTP Authentication: Basic and Digest Access Authentication" [RFC2617].
"407 Proxy Authentication Required" is supported by most Web Servers.
The four hundred series of errors indicate something was sent to the remote web server incorrectly.
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