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NAT Forwarding

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Chapter 12 NAT Forwarding Modem router's NAT (Network Address Translation) feature makes the devices in the LAN use the same public IP address to communicate in the internet, which protects the local network by hiding IP addresses of the devices. However, it also brings about the problem that external host cannot initiatively communicate with the specified device in the local network. With forwarding feature the modem router can penetrate the isolation of NAT and allows the external hosts in the internet to initiatively communicate with the devices in the local network, thus to realize some special functions. TP-Link modem router includes four forwarding rules. If two or more rules are set, the priority of implementation from high to low is Virtual Servers, Port Triggering, UPNP and DMZ. This chapter contains the following sections: • Translate Address and Port by ALG • Open Ports Dynamically by Port Triggering • Make Applications Free from Port Restriction by DMZ • Make Xbox Online Games Run Smoothly by UPnP

Section	Page
About This Guide	6
Get to Know Your Modem Router	7
1. 1. Product Overview	8
1. 2. Physical Appearance	8
1. 2. 1. Top Panel	8
1. 2. 2. Back Panel	10
1. 2. 3. Side Panel	10
Connect the Hardware	12
2. 1. Position Your Modem Router	13
2. 2. Connect Your Modem Router	13
Log In to Your Modem Router	16
Set Up Internet Connections	18
4. 1. Use Quick Setup Wizard	19
4. 2. Manually Set Up an Internet Connection	19
4. 3. Test Internet Connectivity	20
4. 4. Set Up an IPv6 Connection	21
4. 5. More Operation Modes	22
4. 5. 1. Wireless Router Mode	22
4. 5. 2. 3G/4G Router Mode	23
TP-Link Cloud Service	24
5. 1. Register a TP-Link ID	25
5. 2. Change Your TP-Link ID Information	25
5. 3. Manage the User TP-Link IDs	26
5. 3. 1. Add an TP-Link ID to Manage the Router	27
5. 3. 2. Remove TP-Link ID(s) From Managing the Router	27
5. 4. Manage the Router via TP-Link Tether App	28
5. 4. 1. Install the Tether App on Your Smartphones or Tablets	28
5. 4. 2. Locally Manage Your Router Using the Tether App	28
5. 4. 3. Remotely Manage Your Router Using the Tether App	29
Telephony	30
6. 1. Connecting the Telephone	31
6. 2. DECT	31
6. 2. 1. Registering DECT Handset	31
6. 2. 2. Configuring DECT Settings	32
6. 3. Entering Telephone Information	33
6. 4. Telephone Book	36
6. 4. 1. Telephone Book	36
6. 4. 2. Emergency Calls	37
6. 5. Telephony Devices Management	38
6. 6. Call Log	40
6. 7. Calling via Which Number	40
6. 8. Call Blocks	41
6. 8. 1. Do Not Disturb	41
6. 8. 2. Blocking Certain Calls	42
6. 8. 3. Prevent from Dialing	43
6. 9. Forwarding Calls	43
6. 10. Call Through	45
6. 11. tpPhone	46
6. 12. Voice Mail	47
Guest Network	49
7. 1. Create a Network for Guests	50
7. 2. Customize Guest Network Options	50
USB Settings	52
8. 1. Access the USB Storage Device	53
8. 1. 1. Access the USB Device Locally	53
8. 1. 2. Access the USB Device Remotely	55
8. 1. 3. Customize the Access Settings	58
8. 2. Media Sharing	61
8. 3. Printer Sharing	62
8. 4. 3G/4G Settings	66
8. 4. 1. As a Backup Solution for Internet Access	66
8. 4. 2. As the Only Way to Access the Internet	67
Parental Controls	69
QoS	73
10. 1. Prioritize Internet Traffic with QoS	74
10. 2. Update the Database	75
Network Security	77
11. 1. Firewall & DoS Protection	78
11. 2. Service Filtering	79
11. 3. Access Control	80
11. 4. IP & MAC Binding	82
NAT Forwarding	84
12. 1. Translate Address and Port by ALG	85
12. 2. Share Local Resources in the Internet by Virtual Server	86
12. 3. Open Ports Dynamically by Port Triggering	87
12. 4. Make Applications Free from Port Restriction by DMZ	88
12. 5. Make Xbox Online Games Run Smoothly by UPnP	89
VPN Server	91
13. 1. Use OpenVPN to Access Your Home Network	92
13. 2. Use PPTP VPN to Access Your Home Network	93
13. 3. Use IPSec VPN to Access Your Home Network	97
Specify Your Network Settings	100
14. 1. LAN Settings	101
14. 1. 1. Change the LAN IP Address	101
14. 1. 2. Use the Modem Router as a DHCP Server	102
14. 1. 3. Reserve LAN IP Addresses	103
14. 2. IPv6 LAN Settings	103
14. 2. 1. Configure the RADVD Address Type	104
14. 2. 2. Configure the DHCPv6 Server Address Type	104
14. 3. Wireless Settings	105
14. 3. 1. Specify Basic Wireless Settings	105
14. 3. 2. Use WPS for Wireless Connection	107
14. 3. 3. Schedule Your Wireless Function	109
14. 3. 4. View Wireless Information	110
14. 3. 5. Advanced Wireless Settings	110
14. 4. Set Up a Dynamic DNS Service Account	112
14. 5. Interface Grouping	112
14. 6. Create Static Routes	113
14. 7. Set Up the IPv6 Tunnel	116
14. 7. 1. Use the Public IPv6 Tunnel Service-6to4	116
14. 7. 2. Specify the 6rd Tunnel with Parameters Provided by Your ISP	117
Administrate Your Network	118
15. 1. Set System Time	119
15. 2. Control LEDs	120
15. 3. Update the Firmware	120
15. 3. 1. Online Upgrade	121
15. 3. 2. Local Upgrade	121
15. 4. Back up and Restore Configuration Settings	122
15. 5. Change the Administrator Account	123
15. 6. Local Management	123
15. 7. Remote Management	124
15. 8. System Log	125
15. 9. Monitor the Internet Traffic Statistics	127
15. 10. CWMP Settings	128
15. 11. SNMP Settings	130

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Chapter

NAT Forwarding

Modem router’s NAT (Network Address Translation) feature makes the devices in the

LAN use the same public IP address to communicate in the internet, which protects the

local network by hiding IP addresses of the devices. However, it also brings about the

problem that external host cannot initiatively communicate with the specified device in

the local network.

With forwarding feature the modem router can penetrate the isolation of NAT and

allows the external hosts in the internet to initiatively communicate with the devices in

the local network, thus to realize some special functions.

TP-Link modem router includes four forwarding rules. If two or more rules are set, the

priority of implementation from high to low is Virtual Servers, Port Triggering, UPNP and

DMZ.

This chapter contains the following sections:

•

Translate Address and Port by ALG

•

Open Ports Dynamically by Port Triggering

•

Make Applications Free from Port Restriction by DMZ

•

Make Xbox Online Games Run Smoothly by UPnP