User's Manual

Table of Contents
P-660HW-Tx v3 Series User’s Guide
15
9.3.1 Configuring the Port Forwarding Screen .................................................................. 175
9.3.2 The Port Forwarding Rule Edit Screen .................................................................... 177
9.4 The Address Mapping Screen ........................................................................................... 178
9.4.1 The Address Mapping Rule Edit Screen .................................................................. 179
9.5 The SIP ALG Screen .........................................................................................................181
9.6 NAT Technical Reference .................................................................................................. 181
9.6.1 NAT Definitions ........................................................................................................ 181
9.6.2 What NAT Does ....................................................................................................... 182
9.6.3 How NAT Works ....................................................................................................... 183
9.6.4 NAT Application ........................................................................................................ 184
9.6.5 NAT Mapping Types ................................................................................................. 184
Part IV: Security ................................................................................... 187
Chapter 10
Firewalls.................................................................................................................................189
10.1 Overview .......................................................................................................................... 189
10.1.1 What You Can Do in the Firewall Screens ............................................................. 189
10.1.2 What You Need to Know About Firewall ................................................................ 190
10.1.3 Firewall Rule Setup Example ................................................................................. 191
10.2 The Firewall General Screen ........................................................................................... 194
10.3 The Firewall Rule Screen ................................................................................................ 196
10.3.1 Configuring Firewall Rules .................................................................................... 198
10.3.2 Customized Services ............................................................................................ 200
10.3.3 Configuring a Customized Service ....................................................................... 201
10.4 The Firewall Threshold Screen ........................................................................................ 202
10.4.1 Threshold Values ................................................................................................... 202
10.4.2 Configuring Firewall Thresholds ............................................................................. 203
10.5 Firewall Technical Reference ........................................................................................... 205
10.5.1 Firewall Rules Overview ......................................................................................... 205
10.5.2 Guidelines For Enhancing Security With Your Firewall .......................................... 206
10.5.3 Security Considerations ......................................................................................... 207
10.5.4 Triangle Route ........................................................................................................ 207
Chapter 11
Content Filtering ................................................................................................................... 211
11.1 Overview ..........................................................................................................................211
11.1.1 What You Can Do in the Content Filter Screens .....................................................211
11.1.2 What You Need to Know About Content Filtering ....................................................211
11.1.3 Before You Begin .....................................................................................................211
11.1.4 Content Filtering Example ...................................................................................... 212