Error Code 502 Proxy Error Tmg
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a proxy server. The problem is typically caused for one of two reasons: 1 – The Internet Security and 502 proxy error openshift Acceleration (ISA) is configured to throw a proxy error to help guard 502 proxy error chrome against external or internally-based Internet threats, and 2- The client or server computers are misconfigured or using outdated 502 proxy error web service software. What is a 502 Proxy Error? A 502 proxy error is typically thrown in the HTTP cycle. When the error occurs, a server (does not have to be a https://support.microsoft.com/en-us/kb/2423401 Web server) is filling a role similar to a proxy or a gateway server. When a client computer sends an HTTP request (typically a web browser, but can be any software application that is capable of making an HTTP request), it will pass through the server in order to obtain access to the desired URL. The proxy or gateway subsequently receives http://www.tech-faq.com/502-proxy-error.html a 502 error, or invalid response, from the server located “upstream” in the attempt to fulfill the client request. The majority of the time the error is thrown, the upstream server is functioning appropriately. The proxy or gateway and upstream servers just cannot agree on the appropriate protocol for exchanging the information requested in the original client HTTP request. In many of these cases, either the proxy or upstream server are not configured correctly or are running incompatible software. Why Does a 502 Proxy Error Get Thrown? During a typical web browsing session, the following is an example of the classic HTTP cycle when a client computer and web server are communicating: Client Computer: The IP address of the desired website will be obtained from the URL of the site from the DNS server. Client Computer: The computer obtains an IP socket connection to the desired IP address and then sends an HTTP data stream through the IP address. Web Server: HTTP data is sent back to the client computer in response to the original HTTP request. The HTTP respo
| Address Book | Member List | Search | FAQ | Ticket List | Log Out 502 Proxy Error. Forefront TMG denied the specified Uniform Resource Locator (URL). (12202) Users viewing http://forums.isaserver.org/502_Proxy_Error%25_Forefront_TMG_denied_the_specified_Uniform_Resource_Locator_(URL)%25_(12202)/m_2002105582/tm.htm this topic: none Logged in as: Guest Tree Style Printable Version All Forums http://www.alexheer.co.uk/it-blog/tmg-2010-error-code-502-proxy-error-the-data-is-invalid-13 >> [Threat Management Gateway (TMG) 2010] >> General >> 502 Proxy Error. Forefront TMG denied the specified Uniform Resource Locator (URL). (12202) Page: [1] Login Message << Older Topic Newer Topic >> 502 Proxy Error. Forefront TMG denied the specified Uni... - 22.Dec.2010 2:01:02 PM Tarek Mansour Posts: 1 Joined: 22.Dec.2010 Status: offline Hi, 502 proxy I've just installed TMG 2010 behind our internet router. The TMG server has 2 nics one linked to the internal LAN with IP (192.168.10.123) and the other to the router with IP (192.168.1.138), and it has access to the internet. I got a client with IP (192.168.10.192) and configured its LAN Settings to (192.168.10.123) with port 8080; and i configured a rule on the TMG to allow All Outbound 502 proxy error Traffic from IP (192.168.10.192) to External. I now try to open just "www.google.com" and i get: Technical Information (for support personnel) Error Code: 502 Proxy Error. Forefront TMG denied the specified Uniform Resource Locator (URL). (12202) IP Address: 192.168.10.123 Any Help? Thank You _____________________________Eng. Tarek Mansour ERP & Security Administrator Post #: 1 Featured Links* RE: 502 Proxy Error. Forefront TMG denied the specified... - 22.Dec.2010 2:10:48 PM paulo.oliveira Posts: 3472 Joined: 3.Jan.2008 From: Amazon, Brazil Status: offline Hi, suggest you to take a look at Deb Shinders article series about TMG Controlling Internet Access: http://www.isaserver.org/tutorials/Controlling-Internet-Access-Short-Primer-TMG-Access-Rules-Part1.html Regards, Paulo Oliveira. _____________________________Microsoft Premier Field Engineer (PFE) Blog: http://poliveirasilva.wordpress.com/ Twitter: https://twitter.com/poliveirasilva (in reply to Tarek Mansour) Post #: 2 Page: [1] << Older Topic Newer Topic >> All Forums >> [Threat Management Gateway (TMG) 2010] >> General >> 502 Proxy Error. Forefront TMG denied the specified Uniform Resource Locator (URL). (12202) Page: [1] Jump to: Select a ForumAll Forums---------------------- [Threat Management Gateway (TMG) 2010] - - General - - Installation [Forefront Unified Access Gateway 2010] - - General - - Installation - - DirectAccess [IAG 2007] - - General [ISA 2006 General] - - Installation and Planning - - General [ISA 2006 Publishing] - -
were unaccessable and displaying Error Code: 502 Proxy Error. The data is invalid. (13) Source: web filter TMG by default is set to compress all HTTP responses. On this occassion the destinations web server is sending responses back in chunks which is a common thing and if configured correctly does not cause any issues. However TMG's HTTP compression is seeing these chunks as seperate requests and cannot piece them together (search Chunked Transfer Encoding for more information).TMG is functioning correctly! The issue is most likley that thedesitnation web servers HTTP headers are incorrectly configured. I would attempt to contact the sitesweb administrator and point them in the directionof checkingtheir sites Transfer-Encoding header is 'chunked'. If you need to get round this error, you can either bypass TMG or disable HTTP compression on TMG.To do this, open TMG > Web Access Policy. Under Web Access Settings, click 'HTTP Compression' and deselect 'Enable HTTP compression'.Though not ideal, you will now be able to access the site(s). 1 Comment Swingers New Mexico link 27/9/2013 09:58:54 pm Your blog looked so simple to design that I decided to create one, thanks! Reply Leave a Reply. Author Alex Heer Archives August 2016 June 2016 May 2016 March 2016 February 2016 October 2015 September 2015 August 2015 July 2015 April 2015 March 2015 January 2015 December 2014 September 2014 July 2014 June 2014 May 2014 April 2014 March 2014 February 2014 January 2014 December 2013 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 May 2013 April 2013 March 2013 February 2013 January 2013 Categories All Active Directory Awards Certification Cyber Dpm Exchange General Life Group Policy Home Computing Hyper V IIS Mcafee Microsoft Office Mimecast Networking Powershell Rds Security Server 2008 R2 Server 2012 Shoretel Social Media Sql Tmg Virtual Machines RSS Feed Create a free website Powered by Create