Interceptors are modules that intercept PDUs - they can modify data, add/remove tags and a lot more.
In PETEP, there are two directions, in which the PDUs are transmitted through the core (C2S, S2C). Each direction has it's own set of interceptors that process the PDUs in specified order.
Interceptors are shared between proxies, so, if you have four proxies, there will be only two interceptor queues.
Interceptors can be configured inside PETEP (Setting → Interceptors C2S/S2C), where you can see the list of currently created interceptors for the specified direction.
If you want to create new interceptor, just click on the new button fill in the configuration dialog that will appear. Interceptor configuration is divided into section for common interceptor attributes and section for type-specific configuration, which is loaded dynamically after type selection.
Interceptors have 4 basic attributes:
Configuration of interceptor module is dependent on the type of interceptor you are willing to setup (Tagger, Logger, Catcher, ...). If you want to know how to configure the interceptor, check the specific manual in the menu or in-application guide.