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I currently have a remote satellite office that has been configured as a site-to-site VPN. There is a Draytek Vigor 2830 router that is connected to an ISA 2006 server. I am having issues with authentication.

On a windows 7 machine I cannot logon unless I have a cached profile, if I do not have a cached profile then I receive the error of no logon servers available.

Once logged on through a cached profile non of the mapped network drives are connect. When attempting to browse them I receive the error "The system detected a possible attempt to compromise security. Please ensure that you can contact the server that authenticated you" and I'm prompted for my username and password. Inputting the details once fixes this for all network resources.

My main office has a set up of two domain controllers and an ISA server that acts as the default gateway. I can ping computers and servers from the remote office to the main office including the main domain controller using either DNS names or IP addresses. However I cannot ping the second domain controller or the ISA server, instead I receive a timeout message.Using NSLOOKUP I can type in the name of the second domain controller and it will return the correct IP address.

I am unsure how to begin to solve this and any guidance would be greatly appreciated.

Regards

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