Error 502 Isa 2006
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Diogenes [MSFT]November 10, 20081 0 0 0 Have you ever received one of the errors below while browsing a web site? The page cannot be displayed There is a problem with the page you are trying to reach and it cannot be displayed. Technical Information (for support personnel) Error Code: 502 Proxy Error. The HTTP message includes an unsupported header or an https://support.microsoft.com/en-us/kb/935693 unsupported combination of headers. (12156) This could be caused due a response from a web server that begins with a space or tab character in the HTTP Header. If you have ISA Server 2006 SP1 the fix for that is already built in, however you still need tocreate the registry key described in KB935693. https://blogs.technet.microsoft.com/b/yuridiogenes/archive/2008/11/11/502-proxy-error-on-isa-server-2006.aspx This KB has an example of the HTTP header that was captured using Netmon and how it looks like. Note: This KB was also reviewed for TMG MBE and also applies to it.
Tags ISA Administration TMG Comments (1) Cancel reply Name * Email * Website Anonymous says: October 10, 2016 at 9:04 am Thanks so much! I had SP1 installed and checked the file versions but did not have the registry key defined. Reply Follow UsPopular TagsTMG ISA Administration Security Security Admin Performance IAG cloud Book Windows Networking private cloud BYOD ISA Networking teched cloud security Forefront EMS UAG Authentication Windows Contest Archives October 2016(1) September 2016(1) August 2016(2) July 2016(3) June 2016(2) May 2016(4) April 2016(3) March 2016(1) February 2016(1) January 2016(1) All of 2016(19) All of 2015(14) All of 2014(24) All of 2013(33) All of 2012(44) All of 2011(76) All of 2010(79) All of 2009(112) All of 2008(90) Privacy & Cookies Terms of Use Trademarks © 2016 Microsoftfor 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 Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Expand https://www.experts-exchange.com/questions/23738757/ISA-2006-Error-Code-502-Proxy-Error-The-ISA-server-denied-the-specified-URL-12202.html Search Submit Close Search Login Join Today Products BackProducts Gigs Live Careers Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions > ISA 2006 - Error Code 502 Proxy Error. The ISA server denied http://www.tech-archive.net/Archive/ISA/microsoft.public.isa/2008-08/msg00040.html the specified URL 12202 Want to Advertise Here? Solved ISA 2006 - Error Code 502 Proxy Error. The ISA server denied the specified URL 12202 Posted on 2008-09-17 MS Forefront-ISA Windows Networking 1 Verified Solution 5 Comments error 502 9,275 Views Last Modified: 2011-08-18 Error Code 502 Proxy Error. The ISA server denied the specified Uniform Resource Locator (URL) (12202) I am getting this error returned to proxy clients on a unihomed ISA 2006 server setup only as a web proxy. All HTTP, HTTPS, and FTP traffic is allowed in and out. What's up with this? I have no ACLs filtering websites or anything. 0 Question by:Pugglewuggle Facebook Twitter LinkedIn Google LVL error 502 isa 12 Best Solution byPugglewuggle Good news! It appears to be working fine now. This was related to a DNS issue with our ISP... DNS requests were getting dropped and that's why the site was "not found" and therefore "denied" by ISA! Go to Solution 5 Comments LVL 33 Overall: Level 33 Windows Networking 8 MS Forefront-ISA 3 Message Expert Comment by:MikeKane2008-09-17 Is this to all sites, http and https? Have a look at this KB to begin with: http://support.microsoft.com/kb/936594 Do you have any rules setup in the proxy ? 0 LVL 33 Overall: Level 33 Windows Networking 8 MS Forefront-ISA 3 Message Expert Comment by:MikeKane2008-09-17 You can also try these suggestions from Microsoft: https://www.microsoft.com/communities/newsgroups/list/en-us/default.aspx?dg=microsoft.public.isa&tid=5693ec07-2576-4ad9-9ecd-fe01c335ab49&cat=&lang=&cr=&sloc=&p=1 0 LVL 11 Overall: Level 11 MS Forefront-ISA 6 Windows Networking 1 Message Expert Comment by:EricTViking2008-09-17 Have you configured your access rule to allow http,https from internal to internal? 0 LVL 12 Overall: Level 12 MS Forefront-ISA 2 Windows Networking 1 Message Author Comment by:Pugglewuggle2008-09-17 Yes, rules are setup to allow internal and localhost to internal for the proxy. There is no user authentication, all anonymous since it's internal only. All HTTP, HTTPS, and FTP. No restrictions are in place. 0 LVL 12 Overall: Level 12 MS Forefront-ISA 2 Windows Networking 1 Message Accepted Solution by:Pugglewuggle2008-09
- 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 Web Proxy client, please open IE, click Tools->Internet Options, and click Connections->LAN Settings, configure ISA server as your