Chapter 4 User Notes 71Nortel Business Secure Router 222 Configuration — BasicsThe number controls the operating mode:None (disabled)RIP-1 onlyRIP-2 onlyBoth RIP-1 and RIP-2Advanced Router ConfigurationThe following notes are intended to help with advanced router configuration.Setting up the router when the system has a server1 If you are using a Full-Feature NAT configuration, first, do the following...a In SUA/NAT / Address Mapping, add a 'Server' rule, specifying the'Public' IP address of the server.2 For both SUA-Only and Full-Feature NAT configurations, do the following...a In SUA/NAT : SUA Server, add server private IP address and portnumber(s) to the SUA/NAT Server table.b In FIREWALL, add a WAN-to-LAN rulec If the service is not in the list of available services, add it as a 'CustomPort'.d Add the rule, selecting the service, and entering the server IP address asthe destination IP address.Connecting two sites to establish a virtual private networkThe recommended method to do this is through a branch-to-branch IPSec tunnel.1 In VPN / Summary, add a new tunnel by editing an unused rule. Create anActive, Branch Office tunnel.a Select 'Nailed Up' if the tunnel should not be closed while not in use.