Table of Contents
NBG7510 User’s Guide
9
12.2 Port Forwarding ........................................................................................................................... 162
12.2.1 Port Forwarding ................................................................................................................. 162
12.2.2 Add or Edit Port Forwarding ............................................................................................. 163
12.3 Port Triggering ............................................................................................................................. 165
12.3.1 Add or Edit Port Triggering Rule ....................................................................................... 167
12.4 DMZ .............................................................................................................................................. 168
12.5 ALG ............................................................................................................................................... 169
12.6 Address Mapping ....................................................................................................................... 170
12.6.1 Address Mapping Screen ................................................................................................ 170
12.6.2 Add New Rule Screen ...................................................................................................... 171
12.7 Sessions ........................................................................................................................................ 173
12.8 Technical Reference .................................................................................................................. 173
12.8.1 NAT Definitions ................................................................................................................... 174
12.8.2 What NAT Does ................................................................................................................. 174
12.8.3 How NAT Works .................................................................................................................. 175
12.8.4 NAT Application ................................................................................................................ 175
Chapter 13
DNS ....................................................................................................................................................178
13.1 DNS Overview ............................................................................................................................. 178
13.1.1 What You Can Do in this Chapter ................................................................................... 178
13.1.2 What You Need To Know ................................................................................................. 179
13.2 DNS Entry ..................................................................................................................................... 179
13.2.1 Add or Edit DNS Entry ........................................................................................................ 180
13.3 Dynamic DNS .............................................................................................................................. 180
Chapter 14
Firewall ..............................................................................................................................................182
14.1 Overview ..................................................................................................................................... 182
14.1.1 What You Need to Know About Firewall ........................................................................ 182
14.2 Firewall ......................................................................................................................................... 183
14.2.1 What You Can Do in this Chapter ................................................................................... 183
14.3 Firewall General Settings ............................................................................................................ 184
14.4 Protocol (Customized Services) ................................................................................................ 185
14.4.1 Add Customized Service .................................................................................................. 186
14.5 Access Control (Rules) ............................................................................................................... 186
14.5.1 Add New ACL Rule ........................................................................................................... 187
14.6 DoS ............................................................................................................................................... 189
14.7 Firewall Technical Reference .................................................................................................... 190
14.7.1 Firewall Rules Overview .................................................................................................... 190
14.7.2 Guidelines For Security Enhancement With Your Firewall ............................................ 191
14.7.3 Security Considerations .................................................................................................... 191
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