ZyXEL NBG6503 Manuel d'utilisateur Page 131
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Chapter 17 Firewall
NBG6503 User’s Guide
131
17.5 Services Screen
If an outside user attempts to probe an unsupported port on your Router, an ICMP response packet
is automatically returned. This allows the outside user to know the Router exists. Use this screen to
prevent the ICMP response packet from being sent. This keeps outsiders from discovering your
Router when unsupported ports are probed.
You can also use this screen to enable service blocking, enter/delete/modify the services you want
to block and the date/time you want to block them.
Click Security > Firewall > Services. The screen appears as shown next.
Figure 92 Security > Firewall > Services
The following table describes the labels in this screen.
Table 56 Security > Firewall > Services
LABEL DESCRIPTION
ICMP Internet Control Message Protocol is a message control and error-reporting protocol
between a host server and a gateway to the Internet. ICMP uses Internet Protocol (IP)
datagrams, but the messages are processed by the TCP/IP software and directly apparent
to the application user.
Respond to
Ping on
The Router will not respond to any incoming Ping requests when Disable is selected. Select
LAN to reply to incoming LAN Ping requests. Select WAN to reply to incoming WAN Ping
requests. Otherwise select LAN & WAN to reply to all incoming LAN and WAN Ping
requests.
Apply Click Apply to save the settings.
- User’s Guide 1
- IMPORTANT! 2
- READ CAREFULLY BEFORE USE 2
- Related Documentation 2
- Contents Overview 3
- Table of Contents 10
- NBG6503 User’s Guide 10
- Table of Contents 11
- CHAPTER 1 15
- 1.5 LEDs 17
- 1.6 The WPS Button 18
- 1.7 Wall Mounting 18
- Chapter 1 19
- Chapter 1 20
- CHAPTER 2 21
- 2.3 Connect to Internet 22
- 2.3.1 Connection Type: DHCP 23
- 2.3.3 Connection Type: PPPoE 24
- 2.3.4 Connection Type: PPTP 25
- 2.4 Router Password 27
- 2.5 Wireless Security 27
- Chapter 2 Connection Wizard 30
- CHAPTER 3 31
- 3.2.2 Password Screen 32
- 3.2.3 Home Screen 33
- 3.2.3.1 Weather Edit 34
- 3.2.3.2 Time/Date Edit 34
- 3.3 Resetting the Router 35
- CHAPTER 4 37
- 4.4 BW MGMT Monitor 39
- 4.5 DHCP Table 39
- 4.6 Packet Statistics 40
- CHAPTER 5 43
- Chapter 5 Router Modes 44
- CHAPTER 6 45
- 6.2 What You Can Do 46
- 6.3 What You Need to Know 46
- Status Screen 46
- 6.4 Navigation Panel 47
- 6.5 Network Map 47
- 6.6 Control Panel 48
- 6.6.1 Game Engine 49
- 6.6.2 Power Saving 49
- 6.6.3 Content Filter 51
- 6.6.4 Bandwidth MGMT 51
- 6.6.5 Firewall 52
- 6.6.6 Wireless Security 52
- 6.6.7 WPS 54
- Chapter 6 Easy Mode 56
- CHAPTER 7 57
- 7.3 Status Screen 58
- Chapter 7 Router Mode 60
- 7.3.1 Navigation Panel 61
- LINK TAB FUNCTION 62
- Chapter 7 Router Mode 63
- CHAPTER 8 65
- Settings 67
- 8.4 AP Mode Status Screen 68
- Chapter 8 Access Point Mode 69
- 8.5 LAN Screen 70
- Chapter 8 Access Point Mode 72
- CHAPTER 9 73
- Router 75
- Authentication by PIN 76
- SECURITY INFO 76
- WITHIN 2 MINUTES 76
- COMMUNICATION 76
- SSID SSID_Example3 77
- Channel 6 77
- Security WPA-PSK 77
- Chapter 9 Tutorials 80
- Technical Reference 81
- CHAPTER 10 83
- 10.3 What You Should Know 84
- 10.3.1.3 Encryption 85
- 10.3.1.4 WPS 85
- 10.3.1.5 WDS 86
- 10.4.1 No Security 87
- 10.4.2 WEP Encryption 88
- 10.5 MAC Filter 90
- 10.8 WPS Screen 94
- 10.9 WPS Station Screen 95
- 10.10 Scheduling Screen 96
- 10.11 WDS Screen 97
- Chapter 10 Wireless LAN 98
- CHAPTER 11 99
- Encapsulation Method 100
- WAN IP Address 100
- DNS Server Address Assignment 100
- WAN MAC Address 100
- 11.3.2 Multicast 101
- 11.4 Internet Connection 102
- 11.4.2 PPPoE Encapsulation 103
- 11.4.3 PPTP Encapsulation 105
- Chapter 11 WAN 107
- LABEL DESCRIPTION 107
- 11.5 Advanced WAN Screen 108
- CHAPTER 12 109
- 12.3 What You Need To Know 110
- 12.4 LAN IP Screen 111
- 12.5 IP Alias Screen 111
- Chapter 12 LAN 112
- CHAPTER 13 113
- 13.4 Advanced Screen 114
- Chapter 13 DHCP Server 115
- Chapter 13 DHCP Server 116
- CHAPTER 14 117
- 14.3 General NAT Screen 118
- 14.5 NAT Advanced Screen 120
- CHAPTER 15 123
- Chapter 15 Dynamic DNS 124
- Table 53 Network > DDNS 124
- CHAPTER 16 125
- 16.3 IP Static Route Screen 126
- Chapter 16 Static Route 127
- Chapter 16 Static Route 128
- CHAPTER 17 129
- 17.3 What You Need To Know 130
- 17.5 Services Screen 131
- Chapter 17 Firewall 132
- CHAPTER 18 133
- 18.4 Content Filter Screen 134
- Chapter 18 Content Filter 135
- Chapter 18 Content Filter 136
- CHAPTER 19 137
- 19.3 What You Need To Know 138
- 19.4 General Screen 138
- 19.5 Advanced Screen 138
- 19.6 Monitor Screen 143
- SERVICE DESCRIPTION 144
- CHAPTER 20 145
- 20.4 WWW Screen 146
- CHAPTER 21 147
- 21.4 UPnP Screen 148
- 21.5 Technical Refereance 148
- CHAPTER 22 155
- 22.4 Password Screen 156
- 22.5 Time Setting Screen 157
- 22.6 Firmware Upgrade Screen 158
- 22.8 Restart Screen 161
- Access Point 162
- 22.10 Sys OP Mode Screen 163
- Chapter 22 Maintenance 164
- CHAPTER 23 165
- 23.2 Router Access and Login 166
- 23.3 Internet Access 167
- APPENDIX A 171
- Subnet Masks 172
- Network Size 173
- Notation 173
- Subnetting 174
- Example: Four Subnets 175
- Example: Eight Subnets 176
- Subnet Planning 177
- Configuring IP Addresses 178
- Private IP Addresses 178
- IP Address Conflicts 179
- APPENDIX B 181
- Windows XP/NT/2000 182
- Verifying Settings 184
- Windows Vista 185
- Windows 7 189
- Mac OS X: 10.3 and 10.4 193
- Mac OS X: 10.5 and 10.6 196
- Linux: Ubuntu 8 (GNOME) 199
- Linux: openSUSE 10.3 (KDE) 203
- APPENDIX C 209
- Fragmentation Threshold 212
- Preamble Type 213
- Wireless Security Overview 213
- Types of RADIUS Messages 214
- IEEE 802.1x 214
- Types of EAP Authentication 215
- PEAP (Protected EAP) 216
- Dynamic WEP Key Exchange 216
- WPA and WPA2 217
- Encryption 217
- User Authentication 218
- Security Parameters Summary 220
- Antenna Overview 220
- Appendix C Wireless LANs 222
- APPENDIX D 223
- Appendix D Common Services 224
- Appendix D Common Services 225
- APPENDIX E 227
- Notices 228
- Industry Canada Statement 228
- Viewing Certifications 229
- ZyXEL Limited Warranty 229
- National Restrictions 231
- Safety Warnings 233
- Appendix E Legal Information 234
- NBG6503 User’s Guide240 240
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