I have a WAN consisting of a head office with 3 Cisco 805 routers and three remote sites each with its own 805 router. The Cisco 805's have 1 serial connection and 1 ethernet connection.
One of the branch offices has a broadband connection to the internet which all of the other sites want to access. A SonicWall firewall in the branch office is the gateway to the internet. All of the sites need to be able to access each other.
I'm undecided as to whether to use RIP or static routes.
If I use RIP how do I make the firewall in the branch office the gateway of last resort for all of the other sites.
Can I have static routes for all inter-site traffic and have a gateway of last resort that routes through to the firewall in the branch office.