Site-to-site VPN with dynamic IP addresses using Cisco RV 120W routers

[VincentEtter]

Hi,

I want to connect two sites through a VPN tunnel, such that each machine can access all others, regardless of which site they're located.

The two sites have a VDSL connexion with dynamic public IP addresses. Unfortunately, our ISP does not offer static IP addresses with VDSL connexions.

I plan to do the following :

• install two RV 120W routers, one at each site, right after the VDSL modem
• configure the modems in bridge mode, such that the 120Ws get directly the WAN IP address and traffic
• use DynDNS to assign domain names (site1.dyndns.org and site2.dyndns.org) to each site
• assign different subnets to each site (ie 192.168.1/24 for site 1 and 192.168.2/24 for site 2)
• configure a VPN tunnel in gateway mode using the FQDN (site.dyndsn.org and site2.dyndns.org) of each site on both routers, with corresponding remote subnets

Is this sufficient? Do you see any problem with this setup?

Thanks in advance for your help!

[jasbryan]

HI,

T

he RV120W will need to hold the Public routable ip address, but everything else looks fine

Jasbryan

[VincentEtter]

What do you mean by "hold the public routable IP address"?

The RV120Ws will have the public IP addresses on their WAN interface, given by the modems in bridge mode. Is this what you meant?

Thank you for your reply!