Services are a collection of rules or a set of instructions to permit or deny a particular type of traffic through the Firewall, for example, a telnet session. Services figure prominently when defining connections. They specify the type of traffic that can or cannot take place between network objects. The IBM Firewall comes preloaded with a default set of services. You can add to services by using the rule templates to create new rules.
The figure below illustrates how services are composed of rule templates and how they can become part of a connection configuration.
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Controlling Traffic Through the Firewall |
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Examples of Services: Proxy Telnet |
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Examples of Services: Routed Telnet |
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Examples of Services: Proxy HTTP |
Note that many of these services are predefined. These predefined
services are depicted with the
icon. With pre-defined services, you cannot edit the rule composition.
You can, however, edit the the override values and the time controls.
![]() | Create new |
![]() | Predefined service (cannot modify rules) |
![]() | User-defined service (can modify) |