TP-LINK TL-ER5120 Specifications download pdf (Page 15)

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3.1.2 System Mode

The TL-ER5120 router can work in three modes: NAT, Non-NAT and Classic.

If your router is hosting your local network’s connection to the Internet with a network topology as the

Figure 3-2 shows, you can set it to NAT mode.

Figure 3-2 Network Topology - NAT Mode

If your router is connecting the two networks of different areas in a large network environment with a

network topology as the Figure 3-3 shows, and forwards the packets between these two networks by

the Routing rules, you can set it to Non-NAT mode.

Figure 3-3 Network Topology – Non-NAT Mode

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TL-ER5120 1
COPYRIGHT & TRADEMARKS 2
FCC STATEMENT 2
CE Mark Warning 2
Safety Information 3
CONTENTS 4
Package Contents 7
Chapter 1 About this Guide 8
Chapter 2 Introduction 10
2.2 Features 11
2.3 Appearance 12
2.3.2 Rear Panel 13
Chapter 3 Configuration 14
3.1.2 System Mode 15
3.1.3 WAN 17
3.1.3.2 WAN1 18
3.1.4 LAN 35
3.1.4.2 DHCP 36
3.1.4.3 DHCP Client 37
3.1.4.4 DHCP Reservation 37
3.1.5 DMZ 39
3.1.6 MAC Address 40
3.1.7 Switch 42
3.1.7.2 Port Mirror 43
3.1.7.3 Rate Control 45
3.1.7.4 Port Config 46
3.1.7.5 Port Status 47
3.2 User Group 48
3.2.1 Group 49
3.2.2 User 49
3.2.3 View 50
3.3 Advanced 51
3.3.1.2 One-to-One NAT 52
¾ One-to-One NAT 53
¾ List of Rules 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 73
3.3.5.3 Route Table 75
3.4 Firewall 76
3.4.1.2 ARP Scanning 77
3.4.1.3 ARP List 78
3.4.2 Attack Defense 79
Figure 3-50 Attack Defense 80
MAC Filtering 81
3.4.4 Access Control 82
3.4.4.2 Web Filtering 84
3.4.4.3 Access Rules 84
3.4.4.4 Service 86
App Control 88
3.4.5.2 Database 89
3.5 Services 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
3.5.1.5 List of Account 95
3.5.2 E-Bulletin 96
3.5.3 Dynamic DNS 97
3.5.3.1 DynDNS 98
3.5.3.2 No-IP 99
¾ No-IP DDNS 100
3.5.3.3 PeanutHull 101
3.5.3.4 Comexe 102
3.5.4 UPnP 103
3.6 Maintenance 105
3.6.1.2 Login Parameter 106
3.6.1.3 Remote Management 107
3.6.2 Management 108
3.6.2.3 Reboot 109
3.6.2.4 Firmware Upgrade 109
3.6.3 Statistics 110
3.6.4 Diagnostics 112
3.6.4.2 Online Detection 113
3.6.5 Time 114
Note: 115
3.6.6 Logs 116
Chapter 4 Application 118
4.2.1.1 System Mode 119
4.2.1.2 WAN Mode 119
4.2.1.3 Internet Connection 119
4.2.1.4 Link Backup 120
4.2.2 Network Management 121
4.2.2.2 App Control 122
4.2.2.3 Bandwidth Control 123
4.2.2.4 Session Limit 124
4.2.3 Network Security 125
4.2.3.2 WAN ARP Defense 127
4.2.3.3 Attack Defense 127
4.2.3.4 Traffic Monitoring 128
Chapter 5 CLI 131
5.2 Interface Mode 134
5.3 Online Help 135
5.4 Command Introduction 137
5.4.3 sys 138
5.4.4 user 139
5.4.5 history 140
5.4.6 exit 141
Appendix B FAQ 143
Appendix C Glossary 145

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