Proxy Error The Specified Network Name Is No Longer Available
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no longer available while Using a Custom Application through ISA Server 2006 ★★★★★★★★★★★★★★★ Yuri Diogenes [MSFT]July 19, 20095 Share 0 0 1. Introduction Error 64 can happen due many error 64 the specified network name is no longer available situations and I documented one of those situations last year and as you could see system error 64 has occurred the specified network name is no longer available sometimes it is not easy to find out why this error happens. The issue that I’m about to describe here was identified 64 the specified network name is no longer available outlook anywhere while I was troubleshooting a third party application that uses TCP Port 80 to transmit files, but not using HTTP. What?? Yeah, I know. Although IANA has established port 80 for HTTP, anyone can create an application that
Error Code 64: Host Not Available
uses port 80 to send whatever they want. This is fine, as long as you don’t try to use this application behind a Firewall that does application layer inspection and look to that traffic and say: what is that? This is not HTTP Protocol and it is using TCP Port 80…I shall block this traffic! The firewall administrator was smart to understand that and what he did was, he created a custom protocol using the specified network name is no longer available server 2008 port 80 and didn’t bind Web Proxy filtering to it. Fair enough, but doesn’t fully resolved this issue. 2. The Error When the client (which had the 3rd party application installed on his computer) started to transmit the file to the destination it received an error and didn’t proceed. Using Logging feature the Firewall Administrator saw the error below: Figure 1 – Error 64 On the netmon trace we could see that the TCP Handshake was established fine, but after the first HTTP Payload has being sent ISA Server 2006 didn’t like what he saw and the connection was reset. Figure 2 – Connection reset right after first attempt to use TCP Port 80 (with a non compliance HTTP Protocol). 3. Resolution To resolve this problem what you need to do is not only create a custom protocol and an access rule to use this protocol, but also a deny rule right after this access rule to block the regular HTTP Protocol that has the Web Proxy Filter bind to it. The access rules will look like this: Figure 3 – Access rule with a Deny to HTTP (with filter) Protocol. Why do I have to do this? Read this post here and you will know the reason: Why do
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 happen to run into this one the specified network name is no longer available server 2012 day, maybe this will help you get it resolved. Issue: We have a website
The Specified Network Name Is No Longer Available Windows 10
published through ISA 2006. The site is configured for both HTTP and HTTPS access from the ISA server. When a user
The Specified Network Name Is No Longer Available Server 2003
connects to the site over HTTP, the site comes up fine. But when he tries over HTTPS, he gets a ‘page cannot be displayed’. Troubleshooting and Resolution: We started with live logging on the https://blogs.technet.microsoft.com/yuridiogenes/2009/07/19/error-64-the-specified-network-name-is-no-longer-available-while-using-a-custom-application-through-isa-server-2006/ 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 which would translate to this error code.The most common one is when the backend server is performing a 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/ 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 identifying this, we had the 3rd party vendor enable additional Ciphers which are accepted by ISA server. Once we did this, the published site was accessible from the internet. The issue was resolved!! Hope this would be helpfu
here for a quick overview of the site Help Center Detailed answers to any questions you might have http://stackoverflow.com/questions/17170312/wcf-service-returning-502-http-code-the-specified-network-name-is-no-longer-ava Meta Discuss the workings and policies of this site About Us https://www.veeam.com/kb1735 Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just the specified like you, helping each other. Join them; it only takes a minute: Sign up WCF Service returning 502 Http Code (The specified network name is no longer available.) up vote 0 down vote favorite I have a console application to send a file to my WCF Service, but my service is responding with 502 http code (Proxy the specified network Error - The specified network name is no longer available.) when I try to send files larger than 4MB. This code does not make sense to me, since he accepts files smaller than 4MB. WCF Service is running under Windows 2003 Server, IIS 6 and the configuration file as the below.
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