502 Bad Gateway - Response Error, a bad response was received from another proxy server or the destination origin server.

June 1, 2012. Author:

When Using AT&T Wireless, I get the Message Error 502 Bad Gateway

Sometimes when using AT&T wireless mobile broadband, I receive a 502 header response to my queries. The most likely cause of this response is that a forced proxy is in use.

Some mobile broadband hosts force users to access the Internet through a proxy for various reasons. Sometimes they want to compress content streams and reduce the resolution of images on mobile devices to make it work faster and save bandwidth.

How Can I Bypass the Forced Proxy?

How to bypass the proxy depends on what mobile device is in use. Some devices have the proxy settings in the device settings and can be changed there easily. Other wireless broadband devices do not show the proxy settings, or do not allow them to be changed easily.

What is a Forced or Blind Proxy?

Basically these terms mean you either have no choice in using the proxy, and/or you do not know you are using a proxy. A proxy takes internet requests from a user, and then relays them to their destination. Proxies are commonly used along with a firewall by organizations granting Internet access to users.

Proxies allow logging of traffic, restriction of hours of access, and restriction on the types of content that can be accessed. Proxy servers can also help ensure that only authorized users can access the Internet. Quotas can also be enforced.

<?xml version='1.0'?>
<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Strict//EN'
<html xmlns='http://www.w3.org/1999/xhtml'>
<title>The request failed</title>
<p><big>Response Error.</big></p>
<i>Technical description:</i><br/>502 Bad Gateway - Response Error, a bad response was received from another proxy server or the destination origin server.</p>

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