CLICK FINISHTO TURN ON RRAS AND TO CONFIGURE THE SERVER AS A ROUTER...

5. Click Finishto turn on RRAS and to configure the server as a router-to-router VPN server.Make sure you have addresses assigned to all the installed interfaces and that you’veinstalled and set up your routing protocols on each interface.Then you should be able touse this router.

Packet Filtering and Firewalls

One of the best features available in RRAS is the ability to filter TCP/IP packets travelingin either direction. For all practical purposes, enabling packet filtering creates a firewall onyour server.You can build filters that can either allow or deny packet traffic into or out ofyour network.You do this by specifying rules that designate source and destination addressesand ports.Normally, you set up these filters to block information that the machines in your net-work should not receive.The filters are set up on a specific interface.This means that thefilters on one interface are completely independent of the filters on another. Incoming andoutgoing filters are independent of one another also.Simply put, you have two choices with input filters: accept all traffic over the interfaceexcept the traffic you specify, or drop all traffic except the traffic you specify. Output filtersare configured in the same manner.Which choice you should make most often depends onthe context and purpose of the filter.The second option is the most secure. If you areattempting to keep all but very specific traffic out of your network, this would be the cor-rect choice.The first choice is appropriate if you are just trying to stop specific traffic.For instance, say you have a Web server and the only traffic you want to allow on thisserver is traffic traveling to and from the Web server service. All you need to do is configurean input filter for the destination IP address of the Web server and the TCP destination port