Start With a Thorough Application BackupĪs with anything, it’s better to have played it safe at the start than to screw something up and come to regret it later on down the road.
In these situations, the server (or a proxy server, in some cases) is still the network object that is producing the 407 Proxy Authentication Required and returning it as the HTTP response code to the client, but it could be that the client is causing the issue in some way. We’ll explore some of these scenarios (and potential solutions) down below, but be aware that, even though the 407 Proxy Authentication Required is considered a client error response, it doesn’t inherently mean we can rule out either the client nor the server as the culprit in this scenario. In some cases, the server may be misconfigured and handling requests improperly, which can result in 407 code responses and other problematic traffic routing issues. On the other hand, the server could be the root cause of a 407 Proxy Authentication Required error. Many smart phone apps, which implement a modern looking user interface, are often powered behind the scenes by a normal web application. This doesn’t apply solely to web sites, either. Oftentimes, if you’re trying to diagnose an issue within your own application, you can immediately ignore most client-side code and components, such as HTML, cascading style sheets (CSS), client-side JavaScript, and so forth. That said, the appearance of a 4xx error doesn’t necessarily mean the issue is on the client side (the “client”, in this case, is typically the web browser or device being used to access the application). Errors in the 4xx category contrast with those from the 5xx category, such as the 503 Service Unavailable Error we wrote about a couple months ago, which are considered server error responses. Let’s get to it! Server- or Client-Side?Īll HTTP response status codes that are in the 4xx category are considered client error responses. We’ll even examine a number of the most popular content management systems ( CMSs) for potential problem areas that could cause your own website to be generating a 407 Proxy Authentication Required unexpectedly.
In this article we’ll examine the 407 Proxy Authentication Required in more detail by looking at what might cause this message to appear, and we’ll go over a handful of tips you can use to diagnose and debug the appearance of this error within your own application. With a possible pool of over 50 status codes used to represent the complex relationship between the client, a web application, a web server, and (possibly) multiple third-party web services, determining the cause of a particular status code can be difficult under the best of circumstances. However, in the case of a 407 Proxy Authentication Required error, the server isn’t reporting a direct authentication issue, but is instead reporting that the client needs to authenticate with a proxy server, which must send a special Proxy-Authenticate header as part of the response.Īs with most HTTP response codes - especially those that indicate an error - the cause of a 407 Proxy Authentication Required error code can be challenging to find and fix. The 407 error code is similar to the 401 Unauthorized error we looked at a few months ago, which indicates that the client could not be authenticated with the server. The 407 Proxy Authentication Required is an HTTP response status code indicating that the server is unable to complete the request because the client lacks proper authentication credentials for a proxy server that is intercepting the request between the client and server.