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2006 ★★★★★★★★★★★★★★★ Forefront TMG TeamMay 29, 20135 Share 0 0 Here’s some info on an interesting support issue I worked the other day. If you error code 64: host not available background: the connection to the web server was lost. happen to run into this one day, maybe this will help you error code 64 host not available tmg get it resolved. Issue: We have a website published through ISA 2006. The site is configured for both HTTP 64 the specified network name is no longer available. tmg and HTTPS access from the ISA server. When a user connects to the site over HTTP, the site comes up fine. But when he tries over HTTPS, he gets a ‘page cannot

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be displayed’. Troubleshooting and Resolution: We started with live logging on the ISA console while doing a repro of the issue. We were seeing ‘Failed Connection Attempts’ for the traffic coming from the test machine used for the repro, with the error message: Error 64 “The specified network name is no longer available” This error is very generic and there can be multiple reasons host not available meaning which would translate to this error code.The most common one is when the backend server is performing a dirty TCP connection reset. So, to check this further, we collected a network monitor trace on the internal NIC of ISA server. We filtered down to the traffic that is of interest to us. So this clearly indicates that the backend server is Resetting the TCP connection prematurely and this is triggering the ‘64 Error’. Investigating further, we identified that the backend device is a 3rd party load balancer. And for some unknown reasons, the ISA server was failing at the SSL handshake stage. So, we had the 3rd party support team collect a dump of the SSL settings on the Load Balancer and identified the following: Then, we went back to the Network Monitor trace (the earlier screenshot) and compared this with the ciphers advertised by ISA server in the client hello. RSA_WITH_RC4_128_MD5 is not part of the Cipher list sent by the ISA server. Due to this, the 2 peers are not able to successfully choose a common encryption scheme and the SSL handshake fails. After ide

Yosefi - MSFTJanuary 30, 20090 Share 0 0 1. Introduction This post is based on a very interesting issue where an ISA Admin was publishing an host not available in net banking idbi internal Web Server that was working internally just fine for a while. Internally the

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web server was listening on port 82 and therefore the bridging configuration on the Web Publishing rule was correctly setup to HTTP

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82. However when users were trying to browse from outside they received the error below: Figure 1 – Error 64: host not available. To better address this issue we need to gather https://blogs.technet.microsoft.com/isablog/2013/05/29/error-64-the-specified-network-name-is-no-longer-available-while-accessing-a-https-site-through-isa-2006/ more data. 2. Gathering Data There are three main tools that can be used to isolate this issue: · ISA Logging · ISA Diagnostic Logging · Netmon Trace By gathering this data while the user was accessing the web site and getting the error it was possible to better understand what was happening. Let’s see: 1. ISA Serve Logging shows the error 64 and more details about the https://blogs.technet.microsoft.com/isablog/2009/01/30/users-receive-an-error-64-when-browse-a-web-site-published-through-isa-sever-2006/ connection: Figure 2- ISA Server Logging. Notice in the details pane that: · ISA is sending a GET for the FQDN of the internal web server. · Error 64 here appears with more details saying that the network name is no longer available. · Write down the Req ID because it will be used in the filter for Diagnostic Logging 2. Diagnostic Logging shows the following sequence of events: Figure 3- Diagnostic Logging details. The sequence shows: · ISA Server sending the connect request to WSRVCT.contoso.msft on the IP 10.20.20.25 – both are correct. · ISA Server is forwarding the correct path (/*) · Target host header is showing as www.contoso.com · Right after ISA Server sends this request to the target host the web server replies with a response status equals to 400. 3. Network trace shows more details about this 400 > ISA sends HTTP GET (notice the host header): 10.20.20.2 10.20.20.25 HTTP GET / HTTP/1.1, NTLMSSP_NEGOTIATE Hypertext Transfer Protocol GET / HTTP/1.1\r\n Request Method: GET Request URI: / Request Version: HTTP/1.1 Reverse-Via: ISACONTN2, ISACONTN2\r\n Host: www.contoso.com:82\r\n Referer: https://www.contoso.com/CookieAuth.dll?GetLogon?curl=Z2F&reason=0&formdir=3\r\n User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727)\r\n Authorization:NTLM TlRMTVNTUAABAAAAB4IIogAAAAAAAAAAAAAAAAAAAAAFAs4OAA

? Ask a question, help others, and get answers from the community Discussions Start a thread and discuss today's topics with top experts Blogs Read the latest tech blogs written by experienced community members http://itknowledgeexchange.techtarget.com/itanswers/error-code-64-host-not-available-isa-error/ Error Code 64: Host not available - ISA error BhupenJesalpura 10 pts. Tags: Thanks! We'll email youwhen relevant content isadded and updated. Following Follow ISA Server Thanks! We'll email youwhen relevant content https://www.cnet.com/forums/discussions/error-code-64-host-not-available-589985/ isadded and updated. Following Follow ISA Server 2004 Hello Sir;   When I am accessing the  internal website from other system, I get below error. How can I bypass internal broadcast  from ISA host not server?   I alread bypass from  broweser's internet option but still same issue.   With Regards Bhupendra Jesalpura 9426372705Software/Hardware used: ISA 2004 Asked: March 24, 20102:19 PM Last updated: September 23, 20137:53 AM Related Questions edge server setup with ISA 2006 Access from VPN to internal network with an ISA server ISA problem - when i try to access anything from internal to external using isa host not available 2004 it shows me failed except for 80 443 traffic OWA MS ISA server 2000 & Web publishing reverse caching Answer Wiki Last updated: March 29, 20103:56 PM GMT JimmyIT1,725 pts. History Contributors Ordered by most recent JimmyIT1,725 pts. Thanks. We'll let you know when a new response is added. To get rid of the error go to the registry and change the following key. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ Tcpip\Parameters And set EnablePMTUDiscovery to 1 then reboot the machine. To get rid of the error go to the registry and change the following key. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ Tcpip\Parameters And set EnablePMTUDiscovery to 1 then reboot the machine. Please enter an answer. Send me notifications when members answer or reply to this question. Register Hereor login if you are already a member E-mail User Name Password Forgot Password? By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy Improve This Answer Improve This Answer Processing your response...

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