2.31 vSTP Gateway Screening
The role of vSTP in the SS7 network is to transport messages between originating and destination signaling points. Gateway services need to perform a certain level of message screening. The message acceptance or rejection in the network is verified by the screening procedure that serves as network's initial security check. The message screening depends on the type of message received by vSTP.
It includes screening the incoming messages on the basis of MTP3 parameters and SCCP parameters, hence there is two level of screening:
- MTP3 Screening
- SCCP Screening