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ISA 04 Server not authenticating to Domain Controller

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ISA 04 Server not authenticating to Domain Controller - 21.May2010 9:59:56 AM   
inlining

 

Posts: 36
Joined: 23.Aug.2005
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Running ISA 2004 w latest SP's on Server 2003 with SP 2 and starting yesterday my vpn users cannot get a vpn connection. They get the Error 718 The RPC service is not available.
When I rebooted the server it took a very, very long time at "Applying computer settings" and then when I finally got to the ctrl alt del screen and logged in it took a very very long time "applying your personal settings". - usually a sign it cannot authenticate to the domain.
Once at the desktop I ran NETDIAG.exe and the DC list test showed as failed with reason "No DC's are up" and I couldn't do anyting active directory related like add an AD user to a local group on the server - would get error that the RPC service is not available.

I've verified my Inside NIC config and DNS server IP's are correct, no default gateway is listed. All PC's and other servers are fine. Under alerts I see a "Routing (chaining) failure with DescriptionISA Server detected a proxy chain loop. There is a problem with the configuration of the ISA Server routing policy.

Please post any suggestions - I'm under the gun as my remote staff cannont vpn in at the moment.
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