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VPN Dilemma

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MagnumVP

IS-IT--Management
Jul 9, 2002
109
US
I appologize in advance for the length of this message but I want to be though.

I have a Cisco 2621 that is our Gateway via Serial Connection (207.x.x.1) using a T1 DSU/CSU. It has three internal conenctions (172.16.64.1 (Production), 172.16.96.1(Classroom), 172.16.128.1 (Labs)). I use NAT static port mapping to open ports and redirect them to the appropriate service. ie.... ip nat inside source static tcp 172.16.128.2 25 207.x.x.6 25 (redirects SMTP traffic to our internal email server.

I recently purchased two Linksys BEFVP41 VPN Routers. One for this site (HQ) and the other for a remote office. the Remote office has a Dynamic IP DSL conenction. I want to be able to connect the VPN routers so all traffic passing between our two sites are secure.

I have given the Internet port of the Linksys an IP address of 172.16.64.30 (Production Network) and redirected an IP on the router to this IP (all ports).

With the Linksys router is requires that a device be plugged into 1 of the 4 ports on the device. These devices are then able to use the VPN conenction. This device gives out 192.168.1.0 IP scheme by default with a Default Gateway of 192.168.1.1. (Similar to what you might find at home). Since my network is on 172.16.0.0 what do I need to do to allow the Linksys router to work with my entire network and not just the 4 computers plugged into it.

I was thinking of changing the IP scheme on the Linksys to 172.16.64.0 then just plugging the Linksys into our switches. I'm not sure if that would work because to route you have to have 2 differnt networks.

The other option that I was thinking was leaving the Linksys at 192.168.1.0 and plugging it into a mulithomes Windows 2003 Server and using that Server as a Router inside the 172.16.64.0 network. That server would serve as the gateway between the (Cisco)172.16.64.0 and (Linksys)192.168.1.0 networks, but then what Default Gateway do I put the client computers that are on the 172.16.64.0 network as.

I'm a little confused can someone please help?

I hope this makes sense.....man I wish I could post jpeg images of the design here.

Oh well.....

Any help would be great

Thanks

MagnumVP
 
Add a route to the gateway for your next hop to the vpn device.

Can you post a network diagram on the web somewhere?
 
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