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Chapter 9 Network Address Translation (NAT)
P-660HN-TxA User’s Guide
145
9.5 The ALG Screen
Some NAT routers may include a SIP Application Layer Gateway (ALG). A SIP ALG
allows SIP calls to pass through NAT by examining and translating IP addresses
embedded in the data stream. When the ZyXEL Device registers with the SIP
register server, the SIP ALG translates the ZyXEL Device’s private IP address
inside the SIP data stream to a public IP address. You do not need to use STUN or
an outbound proxy if your ZyXEL Device is behind a SIP ALG.
Use this screen to enable and disable the SIP (VoIP) ALG in the ZyXEL Device. To
access this screen, click Network > NAT > ALG.
Figure 70 Network > NAT > ALG
The following table describes the fields in this screen.
Global End IP This is the ending global IP address (IGA). This field is N/A for One-to-
One, Many-to-One and Server mapping types.
Server
Mapping Set
Edit Details
Click this link to go to the Port Forwarding screen to edit a port
forwarding set that you have selected in the Server Mapping Set field.
Back Click this to return to the previous screen without saving.
Apply Click this to save your changes.
Cancel Click this to restore your previously saved settings.
Table 45 Network > NAT > Address Mapping: Edit (continued)
LABEL DESCRIPTION
Table 46 Network > NAT > ALG
LABEL DESCRIPTION
Enable SIP ALG Select this to make sure SIP (VoIP) works correctly with port-
forwarding and address-mapping rules.
Apply Click this to save your changes.
Reset Click this to restore your previously saved settings.
- P-660HN-TxA 1
- About This User's Guide 3
- Customer Support 4
- Disclaimer 4
- Document Conventions 5
- Icons Used in Figures 6
- Safety Warnings 7
- Contents Overview 10
- P-660HN-TxA User’s Guide 10
- Table of Contents 11
- Chapter 7 13
- Chapter 8 13
- User’s Guide 19
- CHAPTER 1 21
- 1.4.1 Internet Access 22
- 1.5 Wireless Access 23
- 1.6 LEDs (Lights) 25
- 1.7 The RESET Button 26
- 1.7.1 Using the Reset Button 27
- Chapter 1 Introduction 28
- CHAPTER 2 29
- Figure 4 Password Screen 30
- 2.2 The Main Screen 31
- 2.2.1 Title Bar 32
- 2.2.2 Navigation Panel 32
- LINK TAB FUNCTION 33
- 2.2.3 Main Window 34
- 2.2.4 Status Bar 34
- CHAPTER 3 35
- Table 4 Status Screen 36
- CHAPTER 4 39
- SSID Example 40
- Security Mode WPA-PSK 40
- 802.11 Mode 802.11b+g+n 40
- 4.2.2 Using WPS 41
- Wireless Client 43
- ZyXEL Device 43
- PIN Configuration 44
- 4.2.3 Without WPS 46
- Another Network 49
- A 192.168.1.34 50
- R’s N1 192.168.1.253 50
- R’s N2 192.168.10.2 51
- B 192.168.10.33 51
- Mappings 52
- Technical Reference 57
- CHAPTER 5 59
- Figure 11 Wizard Welcome 60
- 5.2.1 Manual Configuration 62
- Figure 24 Wireless LAN 69
- CHAPTER 6 73
- 6.1.3 Before You Begin 74
- Chapter 6 WAN Setup 76
- 6.3.1 More Connections Edit 80
- Chapter 6 WAN Setup 81
- 6.4 WAN Technical Reference 83
- 6.4.1.1 ENET ENCAP 84
- 6.4.1.2 PPP over Ethernet 84
- 6.4.1.3 PPPoA 84
- 6.4.1.4 RFC 1483 84
- 6.4.2 Multiplexing 85
- 6.4.3 VPI and VCI 85
- 6.4.4 IP Address Assignment 85
- 6.5 Traffic Shaping 86
- 6.5.1 ATM Traffic Classes 87
- Unspecified Bit Rate (UBR) 88
- CHAPTER 7 89
- 7.2 The LAN IP Screen 91
- 7.3 The DHCP Setup Screen 93
- 7.4 The Client List Screen 94
- 7.5 The IP Alias Screen 95
- Ethernet 96
- Interface 96
- 7.6 LAN Technical Reference 97
- 7.6.2 DHCP Setup 98
- 7.6.3 DNS Server Addresses 98
- 7.6.4 LAN TCP/IP 99
- 7.6.5 RIP Setup 100
- 7.6.6 Multicast 101
- Chapter 7 LAN Setup 102
- CHAPTER 8 103
- 8.1.3 Before You Start 104
- 8.2 The AP Screen 105
- 8.2.1 No Security 106
- 8.2.2 WEP Encryption 107
- 8.2.3 WPA(2)-PSK 108
- 8.2.4 WPA(2) Authentication 109
- Chapter 8 Wireless LAN 111
- LABEL DESCRIPTION 111
- 8.2.6 MAC Filter 112
- 8.3 The More AP Screen 113
- 8.3.1 More AP Edit 114
- 8.4 The WPS Screen 115
- 8.5 The WPS Station Screen 116
- 8.6 The WDS Screen 117
- Chapter 8 Wireless LAN 118
- 8.7 The Scheduling Screen 119
- Radio Channels 121
- 8.8.3.1 SSID 123
- 8.8.3.2 MAC Address Filter 123
- 8.8.3.3 User Authentication 124
- 8.8.3.4 Encryption 124
- 8.8.4 Signal Problems 125
- 8.8.5 BSS 125
- 8.8.6 MBSSID 126
- Figure 58 WDS Link Example 127
- 8.8.8.2 PIN Configuration 128
- Figure 60 How WPS works 131
- REGISTRARENROLLEE 132
- SECURITY INFO 132
- REGISTRAR 132
- ENROLLEE 132
- EXISTING CONNECTION 132
- CHAPTER 9 135
- Port Forwarding 136
- Finding Out More 136
- Default Server IP Address 138
- A=192.168.1.33 139
- D=192.168.1.36 139
- C=192.168.1.35 139
- B=192.168.1.34 139
- 9.5 The ALG Screen 145
- 9.6 NAT Technical Reference 146
- 9.6.3 How NAT Works 147
- 9.6.4 NAT Application 148
- 9.6.5 NAT Mapping Types 148
- Table 48 NAT Mapping Types 149
- CHAPTER 10 151
- LAND Attack 152
- Ping of Death 152
- 10.2 The Firewall Screen 153
- Chapter 10 Firewall 154
- CHAPTER 11 155
- 11.2 The URL Filter Screen 156
- Chapter 11 Filters 159
- Chapter 11 Filters 160
- CHAPTER 12 161
- 12.2 The Static Route Screen 162
- 12.2.1 Static Route Edit 163
- Chapter 12 Static Route 164
- CHAPTER 13 165
- IEEE 802.1Q Tagged VLAN 166
- Chapter 13 802.1Q/1P 167
- Chapter 13 802.1Q/1P 170
- CHAPTER 14 171
- Tagging and Marking 172
- 14.2 The QoS Screen 173
- 14.3 QoS Technical Reference 176
- 14.3.2 IP Precedence 177
- CHAPTER 15 179
- 15.2 The Dynamic DNS Screen 180
- CHAPTER 16 181
- Remote Management Limitations 182
- 16.2 The WWW Screen 183
- 16.3 The Telnet Screen 184
- 16.4 The FTP Screen 185
- 16.5 The SNMP Screen 186
- 16.5.1 Configuring SNMP 187
- 16.6 The DNS Screen 188
- 16.7 The ICMP Screen 189
- Chapter 16 Remote Management 190
- CHAPTER 17 191
- Cautions with UPnP 192
- UPnP and ZyXEL 192
- 17.2 The UPnP Screen 193
- Installing UPnP in Windows Me 194
- Installing UPnP in Windows XP 195
- Network Co nnections 196
- Web Configurator Easy Access 200
- Network 201
- CHAPTER 18 203
- 18.2 The CWMP Setup Screen 204
- Chapter 18 CWMP 205
- LINK DESCRIPTION 205
- Chapter 18 CWMP 206
- CHAPTER 19 207
- Chapter 19 System Settings 209
- Chapter 19 System Settings 210
- CHAPTER 20 211
- System Log 212
- 20.3 Log Descriptions 213
- Table 75 System Error Logs 214
- Table 77 TCP Reset Logs 215
- Table 78 Packet Filter Logs 215
- Table 79 ICMP Logs 216
- Table 80 CDR Logs 216
- Table 81 PPP Logs 216
- Table 82 UPnP Logs 217
- Table 84 Attack Logs 217
- Table 85 802.1X Logs 218
- Table 86 ACL Setting Notes 218
- Table 87 ICMP Notes 219
- Table 88 Syslog Logs 220
- CHAPTER 21 221
- Figure 105 Error Message 223
- Backup Configuration 224
- Restore Configuration 225
- Reset to Factory Defaults 226
- 21.4 The Restart Screen 227
- Chapter 21 Tools 228
- CHAPTER 22 229
- 22.3 The DSL Line Screen 230
- Chapter 22 Diagnostic 231
- Chapter 22 Diagnostic 232
- CHAPTER 23 233
- I forgot the password 234
- 23.3 Internet Access 236
- Chapter 23 Troubleshooting 238
- CHAPTER 24 239
- 24.3 Wireless Features 243
- Table 96 Wireless Features 244
- STANDARD DESCRIPTION 245
- APPENDIX A 247
- Windows 95/98/Me 248
- Configuring 249
- Verifying Settings 250
- Windows 2000/NT/XP 251
- Windows Vista 255
- Macintosh OS 8/9 262
- Macintosh OS X 264
- Using Configuration Files 267
- APPENDIX B 271
- Subnet Masks 272
- Network Size 273
- Notation 274
- Subnetting 274
- Example: Four Subnets 276
- Example: Eight Subnets 277
- Subnet Planning 278
- Configuring IP Addresses 278
- Private IP Addresses 279
- APPENDIX C 281
- JavaScripts 284
- Java Permissions 286
- JAVA (Sun) 287
- Mozilla Firefox 288
- APPENDIX D 291
- Figure 163 RTS/CTS 294
- Fragmentation Threshold 295
- Preamble Type 295
- IEEE 802.11g Wireless LAN 295
- Wireless Security Overview 296
- IEEE 802.1x 297
- Types of EAP Authentication 298
- PEAP (Protected EAP) 299
- Dynamic WEP Key Exchange 300
- WPA and WPA2 300
- Encryption 301
- User Authentication 302
- Security Parameters Summary 304
- Antenna Overview 305
- Antenna Characteristics 305
- Types of Antennas for WLAN 305
- Positioning Antennas 306
- APPENDIX E 307
- Appendix E Services 308
- Appendix E Services 309
- APPENDIX F 311
- ZyXEL Limited Warranty 313
- Registration 314
- Numerics 315
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