16.6 Adding Simple Firewall Rules
Whereas preconfigured rules allow the firewall to be configured based on well known services and applications, the Simple tab of the Add Rule dialog allows incoming and outgoing rules to be defined simply by referencing the corresponding TCP/IP port. The ports used by known applications and services represent only a small subset of the ports available for use by applications and for which firewall rules may need to be defined. A third party application might for example use port 5700 to communicate with a remote server. That being the case, it may be necessary to allow traffic on this specific port using the Simple panel:
Figure 16-8
The rule may be configured to filter either TCP, UDP or both traffic types. In addition the port may be specified as a single port number or as a range of ports with the start and end ports separated by a colon (1000:1500, for example, would apply the rule to all ports between 1000 and 1500). Alternatively,...
