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Flags:
The Flags of route entry. The Flags describe certain characteristics of the
route.
Logical Interface:
The logical interface of route entry.
Physical
Interface:
The physical interface of route entry.
Metric
The Metric of route entry.
3.4 Firewall
3.4.1 Anti ARP Spoofing
ARP (Address Resolution Protocol) is used to analyze and map IP addresses to the corresponding
MAC addresses so that packets can be delivered to their destinations correctly.
ARP functions to translate the IP address into the corresponding MAC address and maintain an ARP
Table, where the latest used IP address-to-MAC address mapping entries are stored. ARP protocol
can facilitate the Hosts in the same network segment to communicate with one another or access to
external network via Gateway. However, since ARP protocol is implemented with the premise that all
the Hosts and Gateways are trusted, there are high security risks during ARP Implementation
Procedure in the actual complex network.
The attacker may send the ARP spoofing packets with false IP address-to-MAC address mapping
entries, and then the device will automatically update the ARP table after receiving wrong ARP
packets, which results in a breakdown of the normal communication. Thus, ARP defense technology is
generated to prevent the network from this kind of attack.
3.4.1.1 IP-MAC Binding
IP-MAC Binding functions to bind the IP address, MAC address of the host together and only allows the
Hosts matching the bound entries to access the network.
Choose the menu Firewall→Anti ARP Spoofing→IP-MAC Binding to load the following page.
- TL-ER5120 1
- COPYRIGHT & TRADEMARKS 2
- FCC STATEMENT 2
- CE Mark Warning 2
- CONTENTS 3
- Package Contents 6
- Chapter 1 About this Guide 7
- Chapter 2 Introduction 9
- 2.2 Features 10
- 2.3 Appearance 11
- 2.3.2 Rear Panel 12
- Chapter 3 Configuration 14
- 3.1.2 System Mode 15
- 3.1.3 WAN 18
- 3.1.3.2 WAN1 19
- 3.1.4 LAN 36
- 3.1.4.2 DHCP 37
- 3.1.4.3 DHCP Client 38
- 3.1.4.4 DHCP Reservation 38
- 3.1.5 DMZ 40
- 3.1.6 MAC Address 41
- 3.1.7 Switch 43
- 3.1.7.2 Port Mirror 44
- 3.1.7.3 Rate Control 46
- 3.1.7.4 Port Config 47
- 3.1.7.5 Port Status 48
- 3.2 User Group 49
- 3.2.1 Group 50
- 3.2.2 User 50
- 3.2.3 View 51
- 3.3 Advanced 52
- 3.3.1.2 One-to-One NAT 53
- 3.3.1.3 Multi-Nets NAT 54
- 3.3.1.4 Virtual Server 57
- 3.3.1.5 Port Triggering 58
- 3.3.1.6 ALG 59
- 3.3.2 Traffic Control 60
- 3.3.2.2 Bandwidth Control 62
- 3.3.3 Session Limit 64
- 3.3.4 Load Balance 65
- 3.3.4.2 Policy Routing 66
- 3.3.4.3 Link Backup 67
- 3.3.4.4 Protocol 69
- Routing 70
- 3.3.5.2 RIP 72
- 3.3.5.3 Route Table 74
- 3.4 Firewall 75
- 3.4.1.2 ARP Scanning 77
- 3.4.2 Attack Defense 78
- Figure 3-48 Attack Defense 79
- MAC Filtering 80
- 3.4.4 Access Control 81
- 3.4.4.2 Web Filtering 83
- 3.4.4.3 Access Rules 83
- 3.4.4.4 Service 86
- App Control 87
- 3.5 Services 89
- 3.5.1.1 General 90
- 3.5.1.2 IP Address Pool 91
- 3.5.1.3 Account 92
- ¾ Account 93
- 3.5.1.4 Exceptional IP 94
- 3.5.2 E-Bulletin 95
- ¾ General 96
- ¾ E-Bulletin 96
- 3.5.3 Dynamic DNS 97
- 3.5.3.1 DynDNS 98
- 3.5.3.2 No-IP 99
- 3.5.3.3 PeanutHull 100
- 3.5.3.4 Comexe 101
- 3.5.4 UPnP 102
- 3.6 Maintenance 103
- 3.6.1.2 Login Parameter 104
- 3.6.2 Management 106
- 3.6.2.3 Reboot 107
- 3.6.2.2 Export and Import 107
- 3.6.3 Statistics 108
- 3.6.4 Diagnostics 110
- 3.6.4.2 Online Detection 112
- 3.6.5 Time 113
- 3.6.6 Logs 114
- Chapter 4 Application 116
- 4.2.1.1 System Mode 117
- 4.2.1.2 WAN Mode 117
- 4.2.1.3 Internet Connection 117
- 4.2.1.4 Link Backup 118
- 4.2.2 Network Management 119
- 4.2.2.2 App Control 120
- 4.2.2.3 Bandwidth Control 121
- 4.2.2.4 Session Limit 122
- 4.2.3 Network Security 123
- 4.2.3.2 WAN ARP Defense 125
- 4.2.3.3 Attack Defense 125
- 4.2.3.4 Traffic Monitoring 126
- Chapter 5 CLI 129
- 5.2 Interface Mode 132
- 5.3 Online Help 133
- 5.4 Command Introduction 134
- 5.4.1 ip 135
- 5.4.2 ip-mac 135
- 5.4.3 sys 135
- 5.4.4 user 137
- 5.4.5 history 138
- 5.4.6 exit 139
- Appendix B FAQ 141
- Appendix C Glossary 143
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