Isa Error Code 502
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502 Proxy Error. Forefront Tmg Denied The Specified Uniform Resource Locator (url). (12202)
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Sysinternals TechNet Gallery Training Training Expert-led, virtual classes Training Catalog Class Locator Microsoft Virtual Academy Free Windows Server 2012 courses Free Windows 8 courses SQL Server training Microsoft Official Courses On-Demand Certifications Certification overview MCSA: Windows 10 Windows Server Certification (MCSE) Private Cloud Certification (MCSE) SQL Server Certification (MCSE) Other resources TechNet Events Second shot for certification Born To Learn blog Find technical communities in your area Support Support options For business For developers For IT professionals For technical support Support offerings More support Microsoft Premier Online TechNet Forums MSDN Forums Security Bulletins & Advisories Not an IT pro? Microsoft Customer Support Microsoft Community Forums United States (English) Sign in Home Library Wiki Learn Gallery Downloads Support Forums Blogs We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. Forefront Threat Management Gateway (TMG) Internet Security and Acceleration (ISA) Server 2006 Operations Operations Troubleshooting HTTP 502: The Uniform Resource Locator (URL) does not use a recognized protocol Troubleshooting HTTP 502: The Uniform Resource Locator (URL) does not use a recognized protocol Troubleshooting HTTP 502: The Uniform Resource Locator (URL) does not use a recognized protocol ISA Server Operations Guide Monitoring, Logging, and Reporting Features in ISA Server 2006 Troubleshooting Outlook Web Access Publishing Enterprise Management in ISA Server 2006 Role-based Administration in ISA Server 2006 Configuring ISA Server to Work with SSL Accelerators Customizing HTML Forms Using
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, let’s 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 https://technet.microsoft.com/en-us/library/bb794799.aspx (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. Don’t just stop reading at 502, check the rest of the response. Here is how to determine whether the http://www.chicagotech.net/msapps/isa1.htm 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, let’s assume you are able to view the content internally just fine, so we’ll 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 returned by the published server. Authorize that in your content filter. • I
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring http://stackoverflow.com/questions/486517/error-code-502-proxy-error-the-isa-server-denied-the-specified-uniform-resourc developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask http://www.tech-archive.net/Archive/ISA/microsoft.public.isa/2008-08/msg00040.html Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Error Code: 502 Proxy Error. The ISA Server denied the specified Uniform Resource Locator (URL). (12202) up vote 0 down vote favorite I am getting above error in some machines but isa error not in some machines while accessing the documents. http proxy isaserver share|improve this question edited Mar 25 '09 at 22:53 Bravax 8,47762962 asked Jan 28 '09 at 4:49 Santosh add a comment| 2 Answers 2 active oldest votes up vote 0 down vote accepted More information in your question might help, but after a quick google I found this forum which may answer your question (there appears to be a hotfix that may help). share|improve this answer answered Jan isa error code 28 '09 at 6:02 Marc Novakowski 30.4k64957 Thanks, actually in a single network from some machines I am able to access the documents present in a website correctly but from some machines for other users not able to, they are getting this error 502 –Santosh Jan 28 '09 at 6:09 add a comment| up vote 1 down vote Open the ISA server2006 and create a role and allow networks internal to allow internal and external. Restart isa services, and it will be work fine. share|improve this answer edited Nov 8 '12 at 11:41 Tom 1,4961221 answered Oct 27 '11 at 8:07 rupesh 211 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. asked 7 years ago viewed 18687 times active 3 years ago Blog Stack Overflow Podcast #91 - Can You Stump Nick Craver? Related 1Error accessing uncompiled pages using ISA Server 2006 SP11Is it correct to return a 502 status code when it's my proxy that has an internal error?2Error Code: 502 Proxy Error. The ISA Server denied the specified Uniform Resource Locator1Fiddler: Error 502 Proxy Error13WCF Client - 407 Proxy Authentication Required whi
- installed hotfix and edited registry key (there was no entry RAT in HKLM\Software\Microsoft, create the additional entries from there) - cleared the DNS cache - cleared the web proxy cache - installed the firewall client and added *.sun.com to the exceptions - disabled compression I still get the error when trying to download the SUN JRE, here is the direct link: http://dl8-cdn-01.sun.com/s/ESD44/JSCDL/jdk/6u7/jre-6u7-windows-i586-p-s.exe?e=1218525172189&h=3b01a4e56c8fe5cc79a7187681f8de04/&filename=jre-6u7-windows-i586-p-s.exe If I disable the rule and use the above link, I'm prompted to save or open the file. Enable the rule, and I get error 502 (12202) again. I collected the cab file with IsaBPA, took a screenshot and captured the log files. I zipped all this and just sent it to your e-mail address. For now, I will restore the ISA server settings (logging, compression). Any other suggestions are welcome. Thanks for your help! Kind regards, Dagwin -- Dagwin "Terence Liu [MSFT]" wrote: Hello Customer, Thank you for posting here. According to your description, I understand that you get error "502 Proxy Error. The ISA Server denied the specified Uniform Resource Locator (URL). (12202)" when you access some web sites after you enabled a deny rule for some other domain name sets. If I have misunderstood the problem, please don't hesitate to let me know. Based on my research, I suggest we try the following steps to see if we can resolve this issue: I. Please apply the following hotfix: An ISA Server 2006 Web Proxy client receives error code 502 when a user tries to visit certain Web sites http://support.microsoft.com/kb/935693 As per the KB935693, we need to create the registry key in the registry of the ISA servers. The path is HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\RAT\Stingray\Debug\Web Filters. And the registry key can be created as follows, Value name: DROP_CONTINUATION_LINES Value type: REG_DWORD Value data: 1 Then, test this issue. II. If the issue persists, please clear DNS cache and Web Proxy cache on ISA Server. a. Clear the DNS cache of the ISA server. Please download and run the script from: http://www.isatools.org/tools/ClrDNS.cmd b. Clear the ISA web proxy cache: How to delete the Web cache in Internet Security and Acceleration Server http://support.microsoft.com/default.aspx?scid=kb;en-us;838248 III. Please make sure all the internal clients are configured as both web proxy client and firewall client: To be a