Isa Server Error 12156
| Address Book | Member List isa 502 audit evidence | Search | FAQ | Ticket List | isa 501 Log Out Error 12156 The HTTP request includes a non-supported header Users viewing this topic: none Logged in as: Guest Tree Style Printable Version All Forums >> [ISA Server 2004 General ] >> General >> Error 12156 The HTTP request includes a non-supported header Page: [1] Login Message << Older Topic Newer Topic >> Error 12156 The HTTP request includes a non-supported h... - 26.Sep.2007 11:03:49 AM lucianolima Posts: 24 Joined: 10.Dec.2005 Status: offline Hello everybody!!! I have problem with aurl specific in my company. My enviromment is: Windows Server 2003 Standard Edtion with SP2, ISA Server 2004 Enterprise Edition SP3. When user access url (http://rvs.info.gedas.de/cgi- bin/registration/registration.cgi?lang=uk&sm=DOWNLOAD_FILE&sid=971689895:RRz7WIg9&product=RVS_XP_05_01_02_ISAM&platform=winxp&method=http), the error in log of ISA it is shown. Failed Connection Attempt STS33WK3 9/26/2007 11:05:39 AM Log type: Web Proxy (Forward) Status: 12156 The HTTP request includes a non-supported header. Contact your ISA Server administrator. Rule: Internal Access Source: Internal ( 10.58.58.111:0) Destination: Internal (rvs.info.gedas.de 139.1.2.45:80) Request: GET http://rvs.info.gedas.de/cgi-bin/registration/registration.cgi?lang=uk&sm=DOWNLOAD_FILE&sid=971689895:RRz7WIg9&product=RVS_XP_05_01_02_ISAM&platform=winxp&method=http Filter information: Req ID: 0c128183 Protocol: http User: domain\userx I saw in this forum a problem seemed(http://forums.isaserver.org/m_2002006903/mpage_1/key_12156%2cThe%2cHTTP%2crequest%2cinclude/tm.htm#2002008548), but my ISA Server it is SP3. Somebody could help me? Thanks, _____________________________Luciano Lima [MVP]-[MCP]-[MCSA Security]-[MCSE Security] Access my site: http://www.guiamcse.com.br Acces
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 http://forums.isaserver.org/Error_12156_The_HTTP_request_includes_a_non-supported_header/m_2002054111/tm.htm 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. Don’t just stop reading at 502, check the rest of the http://www.chicagotech.net/msapps/isa1.htm 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, 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 co
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