502 Proxy Error The Http Request Includes A Non
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clients behind ISA Server 2006 ★★★★★★★★★★★★★★★ Ori Yosefi - MSFTMay 24, 20103 0 0 0 Consider a scenario where users 502 proxy error apache who are part of the internal network of the ISA server and 502 proxy error dns lookup failure have configured their machines as web proxy clients. When those users are trying to go to certain
502 Proxy Error Apache Error Reading From Remote Server
websites they get error "502 proxy error, the request is not supported (50)" message and they are not able to view the page. Data collection to resolve the issue
502 Proxy Error Reason Error Reading From Remote Server
In order to troubleshoot this type of issue, we need to run ISA data packager in repro mode using the Web Proxy and Web Publishing template. The goal is to gather data while the client workstation is having this problem. Data analysis In the ISA Logs collected with ISA data packager we see failed connection attempt with result 502 proxy error openshift code as 50 as highlighted below (copying only the most relevant part of the log with action and result code). Failed www.contoso.com GET 50 http://www.contoso.com/abc/xyz.html http Domain\user1 In the network traces taken on the external NIC of the ISA server we can see that the http get request is going out as follows with all the headers and their corresponding values in the request sent. We need to compare the response that the web server sent for this request which is as follows: In the response, we can see all the headers and their corresponding values; the important header field that was missing in the request sent by the ISA server was “ContentEncoding” which is present in the web server response with value “gzip”. By default ISA server would send this header with values as gzip and deflate but in this case it is not sending that. To find out why ISA server is not sending this header information in the request we need to analyze the BPA report. ISABPA -> add-ins section
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Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Ask a Question Ask for Help Receive https://www.experts-exchange.com/questions/21903188/The-HTTP-request-includes-a-non-supported-header-on-ISA-2004.html Real-Time Help Create a Freelance Project Hire for a Full Time http://www.chicagotech.net/msapps/isa1.htm Job Ways to Get Help Expand Search Submit Close Search Login Join Today Products BackProducts Gigs Live Careers Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions > The HTTP request includes a non-supported header on ISA 2004 Want to Advertise Here? 502 proxy Solved The HTTP request includes a non-supported header on ISA 2004 Posted on 2006-06-29 Miscellaneous 1 Verified Solution 7 Comments 970 Views Last Modified: 2008-01-09 Good day I've got an ISA 2004 server that is used for internet access only, when I try to connecto to a certain URL through the ISA, I get the 502 proxy error following error: Technical Information (for support personnel) Error Code: 502 Proxy Error. The HTTP request includes a non-supported header. Contact your ISA Server administrator. (12156) IP Address: 69.25.56.150 Date: 29/06/06 10:12:34 AM Server: ismid01 Source: proxy Where can I see what the Header is that the URL is using and how do I allow this Header to go through ISA Any Help would be appreciated Thx Floris 0 Question by:Florisvdd Facebook Twitter LinkedIn Google LVL 26 Best Solution byLeon Fester Check the Alerts tab under the monitoring section in ISA Server Management console. You should see the exact reason for the header being rejected. Go to Solution 7 Comments LVL 26 Overall: Level 26 Miscellaneous 2 Message Expert Comment by:Leon Fester2006-06-29 I've seen that same error on my server when I enabled compression after loading SP2. Disabling the compression for request to the external network, in the General Configuration settings, seems to have resolved my issues. 0 Message Author Comment by:Flo
502 Proxy Error Whenever an ISA or TMG server throws a 502 Proxy Error your way, you know you are probably in for a real hurdle. But with a little familiarity with what a 502 error means, and how it can be fixed, you will be back in business in little time. First, lets take a look at the definition of 502 HTTP response code: 502 Bad Gateway The server was acting as a gateway or proxy and received an invalid response from the upstream server. Pay close attention to what that is saying. The proxy (meaning your ISA or TMG server) received an invalid response from the upstream server (implying that the internal webserver that you are publishing!). Unfortunately that is not always the case as ISA and TMG can throw that error when they are unhappy about something that a normal browser would readily accept. They can also throw one of several different kinds of 502 depending on the circumstances. Understanding is critical to a quick resolution. Dont just stop reading at 502, check the rest of the response. Here is how to determine whether the problem is with your ISA/TMG, or on the internal server: 1. Open a browser on the internal network. 2. Access the URL in question. 3. If you can view the content successfully, the problem is with your ISA/TMG. If not, the problem is with your webserver. Since this post is about ISA and TMG, lets assume you are able to view the content internally just fine, so well keep discussing ISA/TMG. 4. Go to your log viewer. In ISA that is Monitoring, or in TMG that is in Logs & Reports. 5. Edit the filter to look at live logs and have the user try again, or filter on the time range to see the error. Add the Filter by criteria for HTTP Status Code, and set it equal to 502. 6. Run the query, and examine the results. Some of the frequent causes of ISA/TMG generating 502s are: A 502 can be thrown by the ISA/TMG when content filtering is enabled and something in the response is being blocked. Disable content filtering and see if you are then able to access the resource. If you are, look at the header in one of the logged errors (in your log, click the more information link on the error) and see what content type is being