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by: rowansmithPosted on 2008-11-20 at 22:01:47ID: 23010801
There are many options for this.
Without knowing what your existing hardware platform is it is not possible to tell you how to leverage your existing investment.
That said if this was a greenfields site and budget was not of concern, and you wanted a Cisco solution (there are many other very capable options from different vendors):
1. Purchase 2x Cisco ASA Firewall
2. Create a Site-To-Site VPN between the two networks to allow each network to talk to each other
3. Integrate the Cisco ASA with a centralised authentication service (Radius against Active Directory)
4. Deploy Cisco VPN Client to each remote user so that they can access either or both networks
There are many many ways to skin this cat, other considerations need to be taken into account such as server consolidation shared authentication services etc etc
-Rowan
If you do not want to leverage existing investment in hardware, then you could purchase a Cisco ASA for each site and configure a site to site VPN connecting the two sites together