502 Proxy Error The Request Is Not Supported 50
Contents |
clients behind ISA Server 2006 ★★★★★★★★★★★★★★★ Ori Yosefi - MSFTMay 24, 20103 0 0 0 Consider a scenario where users who are part of the internal network of the ISA server and have configured their machines 502 proxy error apache as web proxy clients. When those users are trying to go to certain websites they 502 proxy error dns lookup failure get error "502 proxy error, the request is not supported (50)" message and they are not able to view the page. Data 502 proxy error apache error reading from remote server collection to resolve the issue 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 502 proxy error reason error reading from remote server 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 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
502 Proxy Error Openshift
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 -compression filter and verify if compression filter is disabled. Following is the output from the ISABPA when it’s disabled: Compression Filter Name =Compression Filter Version =4.0 Vendor =Microsoft (R) Corporation Description =Enables HTTP/HTTPS compression Enable this filter =False Direction =fpcFilterDirectionBoth Order =4 Relative Path =comphp.dll Priority =fpcFilterPriority_High Vendor Parameters Sets = PersistentName ={8EA49FDD-FFDC-4190-8A66-724BB0342F9F} Guid ={8EA49FDD-FFDC-4190-8A66-724BB0342F9F} Resolution In such a scenario where compression filter is disabled and web server in its responses send contentencoding http header or sends the compressed response, ISA server w
VSE ePO General Google Chrome OS Uncategorized UPS Backup Exec ← Not so muchresting… Active Directory Certification Authority not renewingcertificate → Error Code: 502 Proxy
502 Proxy Error Chrome
Error. The request is not supported.(50) September 17, 2009 Leave a comment 502 proxy error web service As referenced in my last post, I had a problem with viewing a website. Whenever someone tried to view 502 proxy error apache reverse proxy the site at work they got "Error Code: 502 Proxy Error. The request is not supported. (50)" The error is coming from Microsoft ISA Sever 2004, to fix this you need https://blogs.technet.microsoft.com/isablog/2010/05/24/error-502-proxy-error-the-request-is-not-supported-50-while-trying-to-access-websites-from-web-proxy-clients-behind-isa-server-2006/ to enable the compression filter in ISA Server 2004 Configuration > Add-Ins > tab Web Filters > properties Compression Filter > select Enable This filer. > Ok > Apply. This not only fixed the 502 proxy error but also an issue with pages appearing "stripped down" ie only text, no images. Share this:ShareFacebookTwitterGoogleLike this:Like Loading... Related Filed under ISA Sever 2004 Tagged https://restingsysadmin.wordpress.com/2009/09/17/error-code-502-proxy-error-the-request-is-not-supported-50/ with ISA Server 2004, Microsoft About Phill McSherryPhill McSherry has been working in the Australian IT industry for over 20 years and is the technical manager and solutions architect for managed services provider Titan Solutions - www.titansolutions.com.au Leave a Reply Cancel reply Enter your comment here... Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account. (LogOut/Change) You are commenting using your Twitter account. (LogOut/Change) You are commenting using your Facebook account. (LogOut/Change) You are commenting using your Google+ account. (LogOut/Change) Cancel Connecting to %s Notify me of new comments via email. RSS LinksRSS - Posts Twitter I just supported How to Prepare for Emergencies on @ThunderclapIt // @Cryptozoic thndr.me/FsrLEs 2monthsago I'm entered to win Loot Crate's Crate-a-Day Giveaway! lootcrate.com/crate-a-day-gi… #lootcrate #giveaway 2monthsago #lfgsyd Forbidden Island https://t.co/SLMofgiIaL 2monthsago I unlocked the Import master achievement in Disney Infinity! raptr.com/PCVirus?type=t… 2yearsago I unlocked the Sorry? achievement in Disney Infinity! raptr.com/PCVirus?type=t… 2yearsago CategoriesCategories Select Category Apple(1) iPhone(1) Backup Exec(21) Enterprise Vault(1) General(6) Google(1) Chrome OS(1) McAfee(2) ePO(1) VSE(1) M
15 Aug. 2008 / Last Updated on 15 Aug. 2008] Dall Ball, on the ISAserver.org mailing list shared an interesting problem. He noted that after installing http://www.isaserver.org/blogs/shinder/news/isa-server-2004-blocks-requests-that-include-the-accept-encoding-http-header-when-a-forward-proxy-is-used-679.html ISA 2006 SP1, his users were starting to see errors that they hadn't seen before. The error returned to the users' browsers was: Error Code: 502 Proxy Error. The request is http://www.tech-archive.net/Archive/Windows/microsoft.public.windows.server.sbs/2007-05/msg02120.html not supported. (50) It seemed like a pretty mysterious problem to me, even after checking a few lines of log files information provided by Dan. But then Dan did a packet 502 proxy trace on the connection and sent to Jim Harrison. Jim read the capture and said: Do you have compression disabled? If so, have a peek at the script in http://support.microsoft.com/?id=927263. This script is supported for ISA 2006 after SP1. This is a problem I wasn't aware of! You might have the same problem as Dan if the following is true: On a 502 proxy error server that is running Microsoft Internet Security and Acceleration (ISA) Server 2004 with Service Pack 2, you disable the following two Web filters: Compression Filter Caching Compressed Content Filter After you do this, ISA Server 2004 blocks requests that include the Accept-Encoding HTTP header when a forward proxy is used. These Web filters were introduced in ISA Server 2004 Service Pack 2. You might disable these Web filters because of program compatibility problems that involve some Web servers. So, if you're seeing random 502 proxy errors with the request not being supported (50), then you should run the script found at http://support.microsoft.com/kb/927263 UPDATE: More information on this issue from Jim Harrison: "When compression is disabled, ISA will strip off the “Accept-encoding” header that the client sends. This is done to prevent the web site sending compressed responses because ISA can’t apply HTTP body inspection to it. In this case (and several others, it seems), the web site sends compressed content anyway (it’s a Sun server; waddayexpect?). Since ISA knows it can’t process compressed HTTP bodies, it rejects it. Adding this value causes ISA to
time" -- does this apply to the section where there might be "incompatibility between web site and ISA's web proxy filter" and you give me steps on that? I would like to try that while people are still online, but don't want to mess things up with the changes...it is hard for me to be here when nobody is online... jared On Mon, 14 May 2007 07:19:25 GMT, v-terliu@xxxxxxxxxxxxxxxxxxxx (Terence Liu [MSFT]) wrote: Hello Jared, Thanks for posting here. From the description, I understand that you cannot browse certain internet web sites thru ISA 2004 and get error "502 proxy error". If I am off base, please do let me know. Based on my experience, the problem may occur if there is some specific access rules deny the traffic to some certain web sites. I suggest that we try the following steps to see if the problem can be resolved: 1. You have to rerun the CEICW to make sure your SBS 2003 server have right network configuration. Go through the follow KB and Rerun CEICW again carefully. How to configure Internet access in Windows Small Business Server 2003 http://support.microsoft.com/kb/825763/en-us Then open ISA 2004 console, locate on "SBS internet access rules", move this rule to the top and click Apply to save all the settings. 2. Then please open the ISA2004 Management Console, in the left panel, expand to Configuration->Networks. Under "Networks panel", double click "Internal". Switch to "Web Proxy" panel, click "Authentication" button and then uncheck the "Require all users to authenticate" option. Then click the Apply button to save the changes. 3. Please also try deleting the ISA cache to ensure there is no corrupted content. a. On the ISA Server computer, stop the Microsoft Firewall service. To do so: 1). Click Start, click Run, type services.msc in the Open box, and then click OK. 2). Right-click Microsoft Firewall, and then click Stop. b. Start Windows Explorer. c. Locate the Urlcache folder. d. In the Urlcache folder, locate the file that has the .cdat file name extension. e. Right-click the .cdat file, and then click Delete. f. When you are prompted to confirm