P-2302HW/HWL-P1 Series User’s Guide
13.4.2 PSTN Phone To VoIP Phone ................................................................
175
13.4.3 PSTN Phone To PSTN Phone via VoIP ................................................
176
13.5
Trunking General Screen ...............................................................................
13.6
Trunking Peer Call Screen .............................................................................
177
13.7
Trunking Call Rule Screen .............................................................................
179
13.8
VoIP Trunking Example: VoIP to PSTN ..........................................................
181
13.8.1 Background Information ........................................................................
13.8.2 Configuration Details: Outgoing ............................................................
13.8.3 Configuration Details: Incoming ............................................................
182
13.8.4 Call Progression ...................................................................................
183
13.9
VoIP Trunking Example: PSTN to PSTN via VoIP .........................................
184
13.9.1 Background Information ........................................................................
13.9.2 Configuration Details: Outgoing ............................................................
13.9.3 Configuration Details: Incoming ............................................................
186
13.9.4 Call Progression ...................................................................................
187
Chapter 14
Firewall..................................................................................................................
189
14.1
Firewall Overview ..........................................................................................
14.1.1 Stateful Inspection Firewall ...................................................................
14.1.2 About the ZyXEL Device Firewall .........................................................
14.1.3 Guidelines For Enhancing Security With Your Firewall ........................
190
14.1.4 The Firewall, NAT and Remote Management .......................................
14.1.4.1 LAN-to-WAN rules .......................................................................
14.1.4.2 WAN-to-LAN rules .......................................................................
191
14.2
Triangle Route ................................................................................................
14.2.1 The “Triangle Route” Problem ..............................................................
192
14.2.2 Solving the “Triangle Route” Problem ...................................................
14.3
Firewall Screens .............................................................................................
193
14.3.1 General Firewall Screen .......................................................................
14.3.2 Firewall Services Screen .......................................................................
194
Chapter 15
Content Filter........................................................................................................
197
15.1
Content Filtering Overview ............................................................................
15.2
Content Filtering Screens ...............................................................................
15.2.1 Content Filter Screen ............................................................................
15.2.2 Content Filter Schedule Screen.............................................................
199
Chapter 16
201
16.1
Static Route Overview ....................................................................................
16.2
Static Route Screens ......................................................................................
20
Table of Contents