I have an remote site that currently has a DSL connection. We have installed a Cisco 871 router and setup a VPN tunnel back to our corporate office here. It connects to a Netscreen 204 appliance. The VPN tunnel is up and running, but I am having issues with clients at the remote site. The client machines are part of the 2003 AD, but there is no server at the remote site.
The Cisco 871 is setup as a DHCP sever and it offers the DNS and WINS IP addresses of the server back here at the Corporate Office.
Every 3-4 days, when a client logs in to the domain, it can take upwards of 10 minutes or more before they are actually able to start working on their machine. It most cases, this can happen even if there is only one user up and running on the remote connection.
I have checked the config of both the Netscreen and the Cisco 871, and the only potentiial item that I can see that may affect it is the MTU. The Netscreen is set 1500. The Cisco by default is set to 1452 from what I can see. Seeing that there are no issues with the actual tunnel connection, would these settings still have an impact for the client PC's at the remote site?