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ZyXEL NBG-334SH User’s Guide
195
CHAPTER 21
Troubleshooting
This chapter offers some suggestions to solve problems you might encounter. The potential
problems are divided into the following categories.
• Power, Hardware Connections, and LEDs
• ZyXEL Device Access and Login
• Internet Access
• Advanced Features
21.1 Power, Hardware Connections, and LEDs
V The ZyXEL Device does not turn on. None of the LEDs turn on.
7 Make sure you are using the power adaptor or cord included with the ZyXEL Device.
8 Make sure the power adaptor or cord is connected to the ZyXEL Device and plugged in
to an appropriate power source. Make sure the power source is turned on.
9 Disconnect and re-connect the power adaptor or cord to the ZyXEL Device.
10 If the problem continues, contact the vendor.
V One of the LEDs does not behave as expected.
1 Make sure you understand the normal behavior of the LED. See Section 1.5 on page 31.
2 Check the hardware connections. See the Quick Start Guide.
3 Inspect your cables for damage. Contact the vendor to replace any damaged cables.
4 Disconnect and re-connect the power adaptor to the ZyXEL Device.
5 If the problem continues, contact the vendor.
- NBG-334SH 1
- About This User's Guide 3
- Document Conventions 4
- Icons Used in Figures 5
- Safety Warnings 6
- Safety Warnings 7
- Contents Overview 10
- ZyXEL NBG-334SH User’s Guide 10
- Table of Contents 11
- Chapter 4 12
- Chapter 5 12
- Table of Contents 17
- List of Figures 19
- List of Tables 23
- Introduction 27
- CHAPTER 1 29
- 1.5 LEDs 31
- CHAPTER 2 33
- Chapter 2 Wireless Tutorial 34
- Chapter 2 Wireless Tutorial 35
- Figure 5 AP: Status 35
- Figure 16 Profile: Activate 40
- CHAPTER 3 41
- 3.4.1 The Status Screen 43
- 3.4.2 Navigation Panel 46
- Table 4 Screens Summary 47
- Summary: Any IP Table 48
- Table 5 Summary: DHCP Table 49
- Connection Wizard (55) 53
- CHAPTER 4 55
- 4.2.1 System Name 56
- 4.2.2 Domain Name 57
- Chapter 4 Connection Wizard 58
- 4.3.1 Basic (WEP) Security 59
- 4.4.1 Ethernet Connection 61
- 4.4.2 PPPoE Connection 61
- 4.4.3 PPTP Connection 62
- Chapter 4 Connection Wizard 63
- 4.4.4 Your IP Address 64
- 4.4.9 WAN MAC Address 67
- PART III 71
- CHAPTER 5 73
- 5.2.1 SSID 74
- 5.2.2 MAC Address Filter 74
- 5.2.3 User Authentication 74
- 5.2.4 Encryption 75
- 5.3 Quality of Service 76
- Chapter 5 Wireless LAN 77
- Figure 42 Wireless General 77
- Table 23 Wireless General 77
- 5.4.1 No Security 78
- 5.4.2 WEP Encryption 78
- 5.4.3 WPA-PSK/WPA2-PSK 80
- 5.4.4 WPA/WPA2 81
- Chapter 5 Wireless LAN 82
- Table 27 Wireless: WPA/WPA2 82
- 5.5 MAC Filter 83
- Table 28 MAC Address Filter 84
- Figure 49 Wireless LAN QoS 86
- Table 30 Wireless LAN QoS 86
- CHAPTER 6 89
- 6.4 Internet Connection 90
- Chapter 6 WAN 91
- 6.4.2 PPPoE Encapsulation 92
- 6.4.3 PPTP Encapsulation 94
- Chapter 6 WAN 96
- Table 34 PPTP Encapsulation 96
- 6.5 Advanced WAN Screen 97
- Table 35 WAN > Advanced 98
- CHAPTER 7 99
- 7.2.3 Multicast 100
- 7.2.4 Any IP 100
- Chapter 7 LAN 101
- Figure 55 Any IP Example 101
- 7.3 LAN IP Screen 102
- 7.4 LAN IP Alias 102
- 7.5 Advanced LAN Screen 103
- Chapter 7 LAN 104
- Figure 58 Advanced LAN 104
- Table 38 Advanced LAN 104
- CHAPTER 8 105
- Chapter 8 DHCP Server 106
- 8.4 Client List Screen 107
- Table 41 Client List 108
- CHAPTER 9 109
- 9.3 General NAT Screen 110
- Table 42 NAT General 111
- Figure 64 NAT Application 112
- Table 43 NAT Application 112
- 9.4.1 Game List Example 113
- Figure 65 Game List Example 114
- 9.6 NAT Advanced Screen 115
- Table 44 NAT Advanced 117
- CHAPTER 10 119
- Chapter 10 Dynamic DNS 120
- Figure 68 Dynamic DNS 120
- Table 45 Dynamic DNS 120
- CHAPTER 11 121
- 11.2 Triangle Routes 122
- Chapter 11 Firewall 123
- Figure 70 General 123
- Table 46 Firewall General 123
- 11.4 Services Screen 124
- Figure 71 Firewall Services 125
- Table 47 Firewall Services 125
- Chapter 11 Firewall 126
- CHAPTER 12 127
- Chapter 12 Content Filtering 128
- 12.5 Schedule 129
- Chapter 12 Content Filtering 131
- CHAPTER 13 133
- Figure 75 IP Static Route 134
- Table 50 IP Static Route 134
- Table 51 Static Route Setup 135
- CHAPTER 14 137
- Advanced screen 143
- CHAPTER 15 149
- 15.2 WWW Screen 150
- 15.3 Telnet 151
- 15.4 Telnet Screen 151
- 15.5 FTP Screen 152
- 15.6 DNS Screen 153
- CHAPTER 16 155
- 16.2 UPnP and ZyXEL 156
- 16.3 UPnP Screen 156
- Table 66 Configuring UPnP 157
- Figure 98 System Tray Icon 163
- Network 164
- Maintenance and 167
- Troubleshooting 167
- CHAPTER 17 169
- 17.3 Time Setting Screen 170
- Chapter 17 System 171
- Figure 104 Time Setting 171
- Table 68 Time Setting 171
- Chapter 17 System 172
- CHAPTER 18 173
- 18.2 Log Settings 174
- Chapter 18 Logs 175
- Figure 106 Log Settings 175
- Table 70 Log Settings 175
- Chapter 18 Logs 176
- 18.3 Log Descriptions 177
- Table 72 System Error Logs 178
- Table 74 TCP Reset Logs 178
- Table 75 Packet Filter Logs 179
- Table 76 ICMP Logs 179
- Table 81 Attack Logs 181
- Table 82 PKI Logs 182
- Table 83 802.1X Logs 183
- Table 84 ACL Setting Notes 184
- Table 85 ICMP Notes 184
- Table 86 Syslog Logs 185
- CHAPTER 19 187
- 19.2 Configuration Screen 188
- 19.2.1 Backup Configuration 189
- 19.2.2 Restore Configuration 189
- 19.3 Restart Screen 190
- Chapter 19 Tools 191
- Figure 115 System Restart 191
- Chapter 19 Tools 192
- CHAPTER 20 193
- Chapter 20 Configuration Mode 194
- CHAPTER 21 195
- V I forgot the password 196
- 21.3 Internet Access 197
- Chapter 21 Troubleshooting 198
- 21.5 Advanced Features 199
- Appendices and 201
- APPENDIX A 203
- Table 92 Firmware Features 204
- APPENDIX B 207
- JavaScripts 210
- Java Permissions 211
- JAVA (Sun) 212
- APPENDIX C 213
- Subnet Masks 214
- Notation 215
- Subnetting 216
- Example: Four Subnets 217
- Example: Eight Subnets 218
- Subnet Planning 219
- Configuring IP Addresses 220
- APPENDIX D 221
- APPENDIX E 223
- Installing Components 224
- Configuring 225
- Windows 2000/NT/XP 226
- Macintosh OS 8/9 231
- Macintosh OS X 233
- Verifying Settings 234
- Using Configuration Files 237
- 21.5.1 Verifying Settings 238
- APPENDIX F 239
- Appendix F Wireless LANs 240
- Appendix F Wireless LANs 241
- Fragmentation Threshold 242
- Preamble Type 243
- IEEE 802.1x 243
- Types of RADIUS Messages 244
- Types of Authentication 245
- PEAP (Protected EAP) 246
- Dynamic WEP Key Exchange 246
- Encryption 247
- Security Parameters Summary 249
- APPENDIX G 251
- Log Commands 252
- Log Command Example 253
- APPENDIX H 255
- NetBIOS Filter Configuration 256
- APPENDIX I 257
- Appendix I Services 258
- Appendix I Services 259
- APPENDIX J 261
- Example Internal SPTGEN Menus 264
- Appendix J Internal SPTGEN 265
- Table 111 Menu 3 265
- Appendix J Internal SPTGEN 266
- Table 113 Menu 12 269
- Command Examples 276
- APPENDIX K 277
- ZyXEL Limited Warranty 279
- Appendix K Legal Information 280
- APPENDIX L 281
- Appendix L Customer Support 282
- Appendix L Customer Support 283
- Numerics 285
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