After correcting Proxy Settings, you should be able connect to internet. If the DNS lookup is unsuccessful, this causes the request to fail and generate the "Host Not Found (11001)" error message. On the next screen, Enter Correct VPN Name and Address. Referencesįor more information about the change to the exception logic for HTTPS Inspection, click the following article number to go to the article in the Microsoft Knowledge Base:Ģ619991 FIX: An application that uses port 443 to connect to a remote web server no longer works after HTTPSi is enabled in a Forefront Threat Management Gateway 2010 environmentThe new exception logic performs a DNS name resolution on the target's fully qualified domain name (FQDN) to determine whether it is part of the destination exception list. To fix this issue, generate a new license file with the correct hostname and MAC address. Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. System Error: 11001 'WinSock: Host not found (HOSTNOTFOUND)'' Wrong hostname or MAC address in the license file. To resolve this problem, install the hotfix package that is described in the following Microsoft Knowledge Base article:Ģ735208 Rollup 3 for Forefront Threat Management Gateway (TMG) 2010 Service Pack 2 Hope this will be useful for someone else in future. This problem occurs because of a change to the HTTPS Inspection exception logic that was made in Forefront TMG 2010 Service Pack 2. Found the solution: Fiddler->WinInet options->Connections tab->click Lan settings button->Check the checkbox for 'use a proxy server for.'->Click OK in subsquent screens. In this scenario, when the TMG server is used to access an SSL site, a "Host Not Found (11001)" error message is generated. The following images illustrate the correct setup. In case someone has tried all of these older answers, and is still running into problems like: : SOCKSHTTPConnectionPool(host'myhost', port80): Max retries exceeded with url: /my/path (Caused by NewConnectionError('<.socks.SOCKSConnection object at 0x106812bd0>: Failed to establish a new connection: Errno 8 nodename nor.HTTPS Inspection is enabled on the TMG server. Suppose :8080 is a usual HTTP proxy that supports HTTP on port 80 and HTTPS on port 443, and we want to configure Proxifier to process HTTP/HTTPS connections (web browsing) through it. Microsoft Forefront Threat Management Gateway (TMG) 2010 Service Pack 2 was applied to the TMG server.Įxternal DNS resolution is not configured on the TMG server. ![]() A server is implemented as a downstream proxy server in a Microsoft Forefront Threat Management Gateway (TMG) 2010 environment.
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