Zyxel-communications NBG334W Manual de usuario Pagina 145
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Chapter 13 Firewall
NBG334W User’s Guide
145
1 A computer on the LAN initiates a connection by sending a SYN packet to a receiving
server on the WAN.
2 The NBG334W reroutes the packet to Gateway A, which is in Subnet 2.
3 The reply from the WAN goes to the NBG334W.
4 The NBG334W then sends it to the computer on the LAN in Subnet 1.
Figure 79 Using IP Alias to Solve the Triangle Route Problem
13.3 General Firewall Screen
Click Security > Firewall to open the General screen. Use this screen to enable or disable the
NBG334W’s firewall, and set up firewall logs.
Figure 80 Security > Firewall > General l
- User’s Guide 1
- About This User's Guide 3
- Document Conventions 4
- Icons Used in Figures 5
- Safety Warnings 6
- Safety Warnings 7
- Contents Overview 10
- NBG334W User’s Guide 10
- Table of Contents 11
- List of Figures 19
- List of Tables 25
- Introduction 29
- CHAPTER 1 31
- 1.3 Router Mode 32
- 1.7 LEDs 33
- CHAPTER 2 35
- 2.3 Resetting the NBG334W 37
- 2.5.1 Navigation Panel 40
- Table 5 Screens Summary 41
- 2.5.2 Summary: Any IP Table 43
- Table 6 Summary: DHCP Table 44
- CHAPTER 3 47
- 3.2.1 System Name 48
- 3.2.2 Domain Name 49
- Chapter 3 Connection Wizard 50
- 3.3.1 Basic (WEP) Security 51
- 3.4.1 Ethernet Connection 53
- 3.4.2 PPPoE Connection 53
- 3.4.3 PPTP Connection 54
- Chapter 3 Connection Wizard 55
- 3.4.4 Your IP Address 56
- 3.4.9 WAN MAC Address 59
- CHAPTER 4 63
- Chapter 4 AP Mode 64
- Figure 30 Status: AP Mode 64
- Chapter 4 AP Mode 65
- 4.3.1 Navigation Panel 66
- 4.4.1 LAN Settings 67
- CHAPTER 5 73
- Requirements 74
- Setup Information 74
- 5.2.1 SSID 75
- 5.2.2 MAC Address Filter 75
- 5.2.3 User Authentication 76
- 5.2.4 Encryption 76
- 5.3 Roaming 77
- 5.4 Quality of Service 78
- 5.4.1 WMM QoS 79
- Chapter 5 Wireless LAN 80
- 5.5.1 No Security 81
- 5.5.2 WEP Encryption 81
- 5.5.3 WPA-PSK/WPA2-PSK 83
- 5.5.4 WPA/WPA2 84
- Chapter 5 Wireless LAN 85
- 5.6 MAC Filter 86
- 5.9 WiFi Protected Setup 90
- 5.9.2 WPS Station Screen 91
- Figure 45 WPS Station 92
- Table 36 WPS Station 92
- CHAPTER 6 93
- Wireless Client 95
- SSID SSID_Example3 96
- Chapter 6 Wireless Tutorial 97
- 6.4 Configure Your Notebook 98
- Chapter 6 Wireless Tutorial 100
- Figure 54 Link Status 100
- CHAPTER 7 101
- 7.4 Internet Connection 102
- 7.4.2 PPPoE Encapsulation 103
- Chapter 7 WAN 104
- Chapter 7 WAN 105
- 7.4.3 PPTP Encapsulation 106
- 7.5 Advanced WAN Screen 109
- Table 40 WAN > Advanced 110
- CHAPTER 8 111
- 8.2.3 Multicast 112
- 8.2.4 Any IP 112
- Chapter 8 LAN 113
- Figure 59 Any IP Example 113
- 8.3 LAN IP Screen 114
- 8.4 LAN IP Alias 114
- 8.5 Advanced LAN Screen 115
- Chapter 8 LAN 116
- CHAPTER 9 117
- 9.2 Guest WLAN MAC Filter 118
- 9.3 Guest WLAN IP Screen 119
- Internet 120
- Chapter 9 Guest WLAN 121
- Chapter 9 Guest WLAN 122
- CHAPTER 10 123
- Chapter 10 DHCP 124
- Chapter 10 DHCP 125
- 10.4 Client List Screen 126
- CHAPTER 11 129
- 11.3 General NAT Screen 130
- Table 52 NAT Application 132
- 11.4.1 Game List Example 133
- Figure 75 Game List Example 134
- 11.6 NAT Advanced Screen 135
- CHAPTER 12 139
- Chapter 12 Dynamic DNS 140
- Figure 78 Dynamic DNS 140
- Table 54 Dynamic DNS 140
- PART III 141
- CHAPTER 13 143
- 13.2 Triangle Routes 144
- Chapter 13 Firewall 145
- 13.4 Services Screen 146
- Chapter 13 Firewall 148
- CHAPTER 14 149
- Chapter 14 Content Filtering 150
- 14.5 Schedule 151
- Management 153
- CHAPTER 15 155
- CHAPTER 16 159
- Advanced screen 165
- Configuration 168
- CHAPTER 17 169
- 17.2 WWW Screen 170
- 17.3 Telnet 171
- 17.4 Telnet Screen 171
- 17.5 FTP Screen 172
- 17.6 DNS Screen 173
- Chapter 17 Remote Management 174
- CHAPTER 18 175
- 18.2 UPnP and ZyXEL 176
- 18.3 UPnP Screen 176
- Figure 107 System Tray Icon 183
- Network 184
- Maintenance and 187
- Troubleshooting 187
- CHAPTER 19 189
- 19.3 Time Setting Screen 190
- Chapter 19 System 191
- Chapter 19 System 192
- CHAPTER 20 193
- 20.2 Log Settings 194
- Chapter 20 Logs 195
- Chapter 20 Logs 196
- 20.3 Log Descriptions 197
- Table 79 System Error Logs 198
- Table 81 TCP Reset Logs 198
- Table 82 Packet Filter Logs 199
- Table 83 ICMP Logs 199
- Table 88 Attack Logs 201
- Table 89 PKI Logs 202
- Table 90 802.1X Logs 203
- Table 91 ACL Setting Notes 204
- Table 92 ICMP Notes 204
- Table 93 Syslog Logs 205
- CHAPTER 21 207
- 21.2 Configuration Screen 208
- 21.2.1 Backup Configuration 209
- 21.2.2 Restore Configuration 209
- 21.3 Restart Screen 210
- Chapter 21 Tools 211
- Chapter 21 Tools 212
- CHAPTER 22 213
- Chapter 22 Configuration Mode 214
- CHAPTER 23 215
- Chapter 23 Sys Op Mode 218
- CHAPTER 24 219
- Chapter 24 Language 220
- CHAPTER 25 221
- V I forgot the password 222
- FTP to upload new firmware 223
- 25.3 Internet Access 224
- AP or router) 225
- 25.6 Advanced Features 226
- Appendices and 227
- APPENDIX A 229
- Table 101 Firmware Features 230
- NBG334W 231
- Wall-mounting Instructions 232
- APPENDIX B 235
- JavaScripts 238
- Java Permissions 239
- JAVA (Sun) 240
- APPENDIX C 241
- Subnet Masks 242
- Notation 243
- Subnetting 244
- Example: Four Subnets 245
- Example: Eight Subnets 246
- Subnet Planning 247
- Configuring IP Addresses 248
- APPENDIX D 249
- Installing Components 250
- Configuring 251
- Windows 2000/NT/XP 252
- Macintosh OS 8/9 257
- Macintosh OS X 259
- Verifying Settings 260
- Using Configuration Files 263
- 25.6.1 Verifying Settings 264
- APPENDIX E 265
- Appendix E Wireless LANs 266
- Appendix E Wireless LANs 267
- Fragmentation Threshold 268
- Preamble Type 269
- IEEE 802.1x 269
- Types of RADIUS Messages 270
- Types of Authentication 271
- PEAP (Protected EAP) 272
- Dynamic WEP Key Exchange 272
- Encryption 273
- Security Parameters Summary 275
- APPENDIX F 277
- Appendix F Services 278
- Appendix F Services 279
- APPENDIX G 281
- ZyXEL Limited Warranty 283
- Appendix G Legal Information 284
- APPENDIX H 285
- Appendix H Customer Support 286
- Appendix H Customer Support 287
- Numerics 291
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