Go Back   Viprasys - Your #1 source for freewares > PC Related > Hardware related > Internet related

Internet related Find something interesting related to the internet? Post it in here. Again, no COPYRIGHTED material, no WAREZ!

Similar Threads
Thread Thread Starter Forum Replies Last Post
"STOP: C0000221 unknown hard error \SystemRoot\System32\ntdll.dll" +Nmbi+ Help Section 3 12-15-2009 10:14 PM
How to Resolve "Data Coherency Exception" error messages ~Tahsin~ Tutorials 0 06-25-2009 03:39 PM
"READ""_qx4_ < is a hacker"programer"knows arabic" and he says he's allah))) [AK-SWAGGA] Trash Can [Archive] 1 01-22-2009 09:55 AM
unable to login in yahoo "error 81003004" desiguru Yahoo Help and Issues 2 01-10-2009 07:10 AM
please solve " netcmd " error of winXP ... __Rado__ VipraSys Lab 6 02-09-2008 10:55 PM

Post New Thread  Reply
LinkBack Thread Tools Display Modes
Old 12-15-2009, 05:13 PM   #1 (permalink)
Join Date: May 2008
Location: Bangladesh
Posts: 1,061
VipraSys Cash: 1,096,400.45
Thanks (Given): 0
Thanks (Received): 0
Likes (Given): 0
Likes (Received): 0
~Tahsin~ has a reputation beyond repute~Tahsin~ has a reputation beyond repute~Tahsin~ has a reputation beyond repute~Tahsin~ has a reputation beyond repute~Tahsin~ has a reputation beyond repute~Tahsin~ has a reputation beyond repute~Tahsin~ has a reputation beyond repute~Tahsin~ has a reputation beyond repute~Tahsin~ has a reputation beyond repute~Tahsin~ has a reputation beyond repute~Tahsin~ has a reputation beyond repute
Cool WHY-"HTTP Error 502 Bad gateway":pope:

HTTP Error 502 Bad gateway


A server (not necessarily a Web server) is acting as a gateway or proxy to fulfil the request by the client (e.g. your Web browser or our CheckUpDown robot) to access the requested URL. This server received an invalid response from an upstream server it accessed to fulfil the request.

This usually does not mean that the upstream server is down (no response to the gateway/proxy), but rather that the upstream server and the gateway/proxy do not agree on the protocol for exchanging data. Given that Internet protocols are quite clear, it often means that one or both machines have been incorrectly or incompletely programmed.

502 errors in the HTTP cycle

Any client (e.g. your Web browser or our CheckUpDown robot) goes through the following cycle when it communicates with the Web server:
Obtain an IP address from the IP name of the site (the site URL without the leading 'http://'). This lookup (conversion of IP name to IP address) is provided by domain name servers (DNSs).
Open an IP socket connection to that IP address.
Write an HTTP data stream through that socket.
Receive an HTTP data stream back from the Web server in response. This data stream contains status codes whose values are determined by the HTTP protocol. Parse this data stream for status codes and other useful information.

This error occurs in the final step above when the client receives an HTTP status code that it recognises as '502'.

Fixing 502 errors - general

This problem is due to poor IP communication between back-end computers, possibly including the Web server at the site you are trying to visit. Before analysing this problem, you should clear your browser cache completely.

If you are surfing the Web and see this problem for all Web sites you try to visit, then either 1) your ISP has a major equipment failure/overload or 2) there is something wrong with your internal Internet connection e.g. your firewall is not functioning correctly. In the first case, only your ISP can help you. In the second case, you need to fix whatever it is that is preventing you reaching the Internet.

If you get this problem for only some of the Web sites you try to visit then it is likely to be a problem at those sites i.e. one of their pieces of equipment is failing/overloaded. Contact the people at those sites.

Fixing 502 errors - CheckUpDown

Use of proxies and caching is increasing on the Web. Our CheckUpDown robot will always try to 'drill through' to the real computer that actually hosts the Web site, but we do not have complete control over where our HTTP request actually ends up. If only one link in the chain of computers dealing with our HTTP request is broken, then an error such as 502 can easily occur.

Please contact us (email preferred) whenever you encounter 502 errors - there is nothing you can do to sort them out. We then have to liaise with your ISP and the vendor of the Web server software so that they can review the flow of IP data traffic between various computers under their control.
~Tahsin~ is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT. The time now is 03:47 PM.

Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.1
vBCredits II Deluxe - vBulletin Mods & Addons Copyright © 2010-2014 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like v3.1.6 (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
The logos and trademarks used on this site are the property of their respective owners.
We are not responsible for comments posted by our users, as they are the property of the poster.