64 The specified network name is no longer available

Hi Experts,

We have been using TMG 2010 from last 5 years as a reverse web proxy for OWA , outlook anywhere , active sync etc. Of late users from one particular site have been complaining of regular disconnections on outlook and OWA.

We don't have complaint from any other site except to this , whereas users in this site can browse other secure web sites without any challenge.

I have diagnosed the packets coming from their public IP and i could see that lot of connections happen successfully whereas few it shows either denied connection or failed connection attempt.

if i concentrate on failed connection attempt , i get the below information. Can some one provide any hint on the possible resolution for this issue.

Any help would be much appreciated

Failed Connection Attempt  3/19/2015 1:29:14 PM
<id id="L_LogPane_LogType">Log type: </id><id id="L_LogPane_WebProxyForward">Web Proxy (Reverse)</id>
<id id="L_LogPane_Status">Status: </id>64 The specified network name is no longer available.
<id id="L_LogPane_Rule">Rule: </id>Outlook anywhere success rule
<id id="L_LogPane_Source">Source: </id>External (91.230.41.193:53933)
<id id="L_LogPane_Destination">Destination: </id>Local Host 

<id id="L_LogPane_FilterInfo">Filter information: </id>Req ID: 19374dc2; Compression: client=No, server=No, compress rate=0% decompress rate=0% ; FBA cookie: exists=no, valid=no, updated=yes, logged off=no, client type=unknown, user activity=yes
<id id="L_LogPane_Protocol">Protocol: </id>https
<id id="L_LogPane_User">User: </id>anonymous

March 19th, 2015 5:39am

Hi,

>>64 The specified network name is no longer available

This error is very general. You need to collect a network trace and analyze it. The most common one is when the backend server is performing a dirty TCP connection reset.

You could have a look at the blog below.

Error 64 The specified network name is no longer available while accessing a HTTPS site through ISA 2006

Best Regards,

Joyce

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March 20th, 2015 4:06am

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