Define the services you want to use on your firewall. Use only services which are already defined with the Definition form. To delete a service from the list, leave the entries Service and Hosts blank. The configuration file is 'etc/fw.cfg'.
The network device is specified with all IP-filtering rules. This means that you have to define separate rules for each service if the specified hosts for the definition will be connected with different devices.
Example: You want to telnet from the firewall to the internet (device ppp0 / outgoing) and to the internal network (device eth0 / outgoing). Thus you have to setup two definitions for telnet, each for every network interface. Additionally you want to connect the firewall from the $ADMIN hosts:
telnet - $any - Outgoing
telnet - $internal - Outgoing
telnet - $ADMIN - Incoming
These hosts canīt connect the firewall - e.g. all hosts located on the perimeter network.
Define the service, the direction and the valid hosts for the service definition.
(c) 1998 J. Hellmerichs-Friedrich