Table of Contents

13.8.3 Configuration Details: Incoming .............................................................................

178

13.8.4 Call Progression .....................................................................................................

179

13.9

VoIP Trunking Example: PSTN to PSTN via VoIP ..........................................................

179

13.9.1 Background Information .........................................................................................

180

13.9.2 Configuration Details: Outgoing .............................................................................

180

13.9.3 Configuration Details: Incoming .............................................................................

182

13.9.4 Call Progression .....................................................................................................

183

Part IV: Security ...................................................................................

185

Chapter 14

 

Firewall...................................................................................................................................

187

14.1

Firewall Overview ............................................................................................................

187

14.1.1 Stateful Inspection Firewall ....................................................................................

187

14.1.2 About the ZyXEL Device Firewall ...........................................................................

187

14.1.3 Guidelines For Enhancing Security With Your Firewall ..........................................

188

14.1.4 The Firewall, NAT and Remote Management ........................................................

188

14.2

Triangle Route .................................................................................................................

189

14.2.1 The “Triangle Route” Problem ................................................................................

189

14.2.2 Solving the “Triangle Route” Problem ....................................................................

190

14.3

Firewall Screens ..............................................................................................................

191

14.3.1 General Firewall Screen .........................................................................................

191

14.3.2 Firewall Services Screen ........................................................................................

192

Chapter 15

 

Content Filter.........................................................................................................................

195

15.1

Content Filtering Overview ..............................................................................................

195

15.2

Content Filtering Screens ................................................................................................

195

15.2.1 Content Filter Screen .............................................................................................

195

15.2.2 Content Filter Schedule Screen .............................................................................

197

Part V: Management ............................................................................

199

Chapter 16

 

Static Route ...........................................................................................................................

201

16.1

Static Route Overview .....................................................................................................

201

16.2

Static Route Screens .......................................................................................................

201

16.2.1 IP Static Route Screen ...........................................................................................

201

16.2.2 IP Static Route Edit Screen ....................................................................................

202

16

 

P-2302HWUDL-P1 Series User’s Guide