User Guide

STPro Firewall Model
STPro Firewall modules
17 Network Security - Firewalling
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3EC 36231 ABAA TCZZA Ed. 01
17.2 Firewall Model
The following figure shows a model of the STPro Firewall:
(1)
(2)
(3)
Sink
Source
Input
Output
Forward
Router
Module
Forward
Module
Dynamic NA(P)T
Module
Static NA(P)T
Module
The following modules can be identified (See Firewall model):
 Router Module
This module, which has nothing to do with the STPro IP
router, is responsible for the traffic within" the STPro Firewall,
i.e. it routes the packets towards the Sink PIP or Forward PIP.
 Forward Module
This module is responsible for forwarding the packets toward
the output.
 Static/Dynamic NA(P)T Modules
These modules are responsible for the translation of IP
addresses, in case NA(PT) is used.