After it is
established, a site-to-site VPN connection enables clients in the local network to access
resources in the remote network as if they were local.
NOTE
The IPSec Tunnel Mode scenario is the only one that differs slightly from this model:
The remote server is not an ISA server, but a third-party VPN box.
Important Points to Consider
ISA Server 2006??™s Site-to-Site VPN Connection wizard is greatly improved over the one
provided with ISA Server 2004. The wizard walks through the entire scenario, and allows
for the configuration of network rules and access rules. That said, there are still a few areas
that can trip up administrators who attempt to set up the connection. It is important to
keep these factors in mind when preparing to set up a site-to-site VPN network:
. The name of the Local VPN User accounts must exactly match the name of the site
created in the wizard. If it doesn??™t match, it will fail to connect. So, in the scenario
we are examining, this means that the ISA server in San Francisco will have a local
user account named Toronto, and the ISA server in Toronto will have a local user
account named SanFrancisco.
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