troubleshooting Question

VPN - can't see beyond VPN router - CISCO RV042 or NETGEAR FVS318

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astgpaul asked on
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We're running SBS 2010 in a domain of about 55pcs. We have a of four leased lines all with dedicated public IPs. Our subnets are for the head office, for one branch office and for the second branch.

Our branch 1 connects successfully via its own leased 2Mb internet line to the Head Office 2Mb line on a public IPs between two Netgear FVS318s. It can see the domain and ping any PC that permits that.

Branch 2 has a 10Mb leased line with a public IP connecting through a telco-managed Cisco router with a Cisco RV042 VPN Firewall router to the HO's BT/Openreach 10Mb fibre circuit connected to a telco-managed Cisco 2800 series router and then onto our Cisco RV042 VPN Firewall router, again with a public IP.

I have been assured by the telecos at both the HO site and branch office two site that no traffic is being held back by the internet-facing leased line Cisco routers, and our VPN routers should be connecting and seeing each other's subnet without problem.

But the problem is, even though the VPN routers are connected via a VPN tunnel and can ping each other's local IP address, neither router can see beyond and I cannot ping or connect to any device into the subnet which lies beyond each router.

The problem is significent because we are planning on installing IP phones at the branch office which need a VPN tunnel to work into our phone system at the HO.

Is there any expert that might supply a solution? I've tried using Netgear VPN routers and have now replaced these with Cisco RV042 VPN routers with the same result.
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