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Port Triggering

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Chapter 9 Network Address Translation (NAT) Table 34 Port Forwarding: Add/Edit (continued) LABEL DESCRIPTION Start Port Configure this for a user-defined entry. Enter the original destination port for the packets. To forward only one port, enter the port number again in the End Port field. End Port To forward a series of ports, enter the start port number here and the end port number in the End Port field. Configure this for a user-defined entry. Enter the last port of the original destination port range. To forward only one port, enter the port number in the Start Port field above and then enter it again in this field. Translation Start Port Translation End Port Server IP Address Configure Originating IP Originating IP Protocol OK Cancel To forward a series of ports, enter the last port number in a series that begins with the port number in the Start Port field above. Configure this for a user-defined entry. This shows the port number to which you want the Zyxel Device to translate the incoming port. For a range of ports, enter the first number of the range to which you want the incoming ports translated. Configure this for a user-defined entry. This shows the last port of the translated port range. Enter the inside IP address of the virtual server here. Click the Enable check box to enter the originating IP in the next field. Enter the originating IP address here. Select the protocol supported by this virtual server. Choices are TCP, UDP, or TCP/UDP. Click this to save your changes. Click this to exit this screen without saving. 9.3 Port Triggering Some services use a dedicated range of ports on the client side and a dedicated range of ports on the server side. With regular port forwarding, you set a forwarding port in NAT to forward a service (coming in from the server on the WAN) to the IP address of a computer on the client side (LAN). The problem is that port forwarding only forwards a service to a single LAN IP address. In order to use the same service on a different LAN computer, you have to manually replace the LAN computer's IP address in the forwarding port with another LAN computer's IP address. Trigger port forwarding allows computers on the LAN to dynamically take turns using the service. The Zyxel Device records the IP address of a LAN computer that sends traffic to the WAN to request a service with a specific port number and protocol (a \"trigger\" port). When the Zyxel Device's WAN port receives a response with a specific port number and protocol (\"open\" port), the Zyxel Device forwards the traffic to the LAN IP address of the computer that sent the request. After that computer's connection for that service closes, another computer on the LAN can use the service in the same manner. This way you do not need to configure a new IP address each time you want a different LAN computer to use the application. For example: LTE Series User's Guide 109

Section	Page
LTE Series	1
Document Conventions	3
Contents Overview	4
Table of Contents	5
User’s Guide	12
Introduction	13
1.1 Overview	13
1.2 Application for the Zyxel Device	14
1.3 Manage the Zyxel Device	14
1.4 Good Habits for Managing the Zyxel Device	15
1.5 Front and Bottom Panels	15
1.5.1 LEDs (Lights)	17
1.5.2 Panel Ports & Buttons	17
1.5.3 Turning On/Off WiFi	18
1.5.4 The RESET Button	19
The Web Configurator	21
2.1 Overview	21
2.1.1 Access the Web Configurator	21
2.2 Web Configurator Layout	23
2.2.1 Settings Icon	23
2.2.2 Widget Icon	27
Quick Start	30
3.1 Overview	30
3.2 Quick Start Setup	30
3.3 Time Zone	30
3.4 The Internet Connection Setup	31
3.4.1 Successful Internet Connection	31
3.4.2 Unsuccessful Internet Connection	32
3.5 Quick Start Setup-Wireless	32
3.6 Quick Start Setup-Finish	33
Tutorials	34
4.1 Overview	34
4.2 Set Up a Wireless Network Using WPS	34
4.2.1 Push Button Configuration (PBC)	35
4.2.2 PIN Configuration	36
4.3 Connect to the Zyxel Device’s WiFi Network	37
4.4 Configure a Firewall Rule	40
4.5 Configure MAC Filter	41
4.6 Upgrade Firmware on the Zyxel Device	42
4.7 Back up a Configuration File	43
4.8 Restore Configuration	43
4.9 Configure DHCP	44
4.9.1 Add Devices to Your Static DHCP List	45
4.10 Configure Static Route for Routing to Another Network	46
4.11 Access the Zyxel Device Using DDNS	48
4.11.1 Register a DDNS Account on www.dyndns.org	49
4.11.2 Configure DDNS on Your Zyxel Device	49
4.11.3 Test the DDNS Settings	50
Technical Reference	51
Connection Status	52
5.1 Connection Status Overview	52
5.1.1 Connectivity	52
5.1.2 System Info	53
5.1.3 Cellular Info	55
5.1.4 WiFi Settings	59
5.1.5 LAN	60
Broadband	63
6.1 Overview	63
6.1.1 What You Can Do in this Chapter	63
6.1.2 What You Need to Know	64
6.1.3 Before You Begin	64
6.2 Broadband	64
6.3 Cellular WAN	65
6.4 Cellular APN	66
6.5 Cellular SIM Configuration	67
6.6 Cellular Band Configuration	68
6.7 Cellular PLMN Configuration	69
6.8 Cellular IP Passthrough	72
6.9 Cellular Lock	73
Home Networking	75
7.1 Overview	75
7.1.1 What You Can Do in this Chapter	75
7.1.2 What You Need To Know	75
7.2 LAN Setup	76
7.3 Static DHCP	80
7.3.1 Before You Begin	80
7.4 UPnP	82
7.5 Technical Reference	83
7.6 Turn on UPnP in Windows 7 Example	84
7.6.1 Auto-discover Your UPnP-enabled Network Device	85
7.7 Turn on UPnP in Windows 10 Example	87
7.7.1 Auto-discover Your UPnP-enabled Network Device	89
7.8 Web Configurator Easy Access in Windows 7	92
7.9 Web Configurator Easy Access in Windows 10	94
Routing	97
8.1 Overview	97
8.2 Configure Static Route	97
8.2.1 Add/Edit Static Route	98
8.3 DNS Route	100
8.3.1 Add/Edit DNS Route	100
8.4 Policy Route	101
8.4.1 Add/Edit Policy Route	103
8.5 RIP Overview	104
8.5.1 RIP	104
Network Address Translation (NAT)	105
9.1 Overview	105
9.1.1 What You Can Do in this Chapter	105
9.1.2 What You Need To Know	105
9.2 Port Forwarding Overview	106
9.2.1 Port Forwarding	107
9.2.2 Add/Edit Port Forwarding	107
9.3 Port Triggering	109
9.3.1 Add/Edit Port Triggering Rule	111
9.4 DMZ	112
9.5 ALG	113
Dynamic DNS Setup	115
10.1 DNS Overview	115
10.1.1 What You Can Do in this Chapter	115
10.1.2 What You Need To Know	115
10.2 DNS Entry	116
10.2.1 Add/Edit DNS Entry	116
10.3 Dynamic DNS	117
Firewall	119
11.1 Overview	119
11.1.1 What You Need to Know About Firewall	119
11.2 Firewall	120
11.2.1 What You Can Do in this Chapter	120
11.3 Firewall General Settings	120
11.4 Protocol (Customized Services)	122
11.4.1 Add Customized Service	122
11.5 Access Control (Rules)	123
11.5.1 Add New ACL Rule Screen	124
11.6 DoS	126
11.7 Firewall Technical Reference	127
11.7.1 Firewall Rules Overview	127
11.7.2 Guidelines For Security Enhancement With Your Firewall	128
11.7.3 Security Considerations	128
MAC Filter	130
12.1 MAC Filter Overview	130
12.2 MAC Filter	130
12.2.1 Add New Rule	131
Certificates	132
13.1 Certificates Overview	132
13.1.1 What You Can Do in this Chapter	132
13.2 Local Certificates	132
13.2.1 Create Certificate Request	133
13.2.2 View Certificate Request	134
13.3 Trusted CA	136
13.4 Import Trusted CA Certificate	137
13.5 View Trusted CA Certificate	137
13.6 Certificates Technical Reference	138
13.6.1 Verify a Certificate	139
Log	141
14.1 Log Overview	141
14.1.1 What You Can Do in this Chapter	141
14.1.2 What You Need To Know	141
14.2 System Log	142
14.3 Security Log	142
Traffic Status	144
15.1 Traffic Status Overview	144
15.1.1 What You Can Do in this Chapter	144
15.2 WAN Status	144
15.3 LAN Status	145
ARP Table	147
16.1 ARP Table Overview	147
16.1.1 How ARP Works	147
16.2 ARP Table	148
Routing Table	149
17.1 Routing Table Overview	149
17.2 Routing Table	149
Cellular WAN Status	152
18.1 Cellular WAN Status Overview	152
18.2 Cellular WAN Status	152
System	157
19.1 System Overview	157
19.2 System	157
User Account	158
20.1 User Account Overview	158
20.2 User Account	158
20.2.1 User Account Add/Edit	159
Remote Management	161
21.1 Overview	161
21.2 MGMT Services	161
21.3 MGMT Services for IP Passthrough	162
21.4 Trust Domain	163
21.5 Add Trust Domain	164
21.6 Trust Domain for IP Passthrough	164
21.7 Add Trust Domain	165
Time Settings	166
22.1 Time Settings Overview	166
22.2 Time	166
E-mail Notification	169
23.1 E-mail Notification Overview	169
23.2 E-mail Notification	169
23.2.1 E-mail Notification Edit	170
Log Setting	172
24.1 Log Setting Overview	172
24.2 Log Setting	172
Firmware Upgrade	175
25.1 Overview	175
25.2 Firmware Upgrade	175
Backup/Restore	177
26.1 Backup/Restore Overview	177
26.2 Backup/Restore	177
26.3 Reboot	178
Diagnostic	180
27.1 Diagnostic Overview	180
27.2 Ping/TraceRoute/Nslookup Test	180
Troubleshooting	182
28.1 Overview	182
28.2 Power and Hardware Connections	182
28.3 Zyxel Device Access and Login	182
28.4 Internet Access	184
28.5 UPnP	185
28.6 SIM Card	186
28.7 Cellular Signal	186
Appendices	188
Customer Support	189
IPv6	195
Legal Information	202

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Chapter 9 Network Address Translation (NAT)

LTE Series User’s Guide

109

9.3

Port Triggering

Some services use a dedicated range of ports on the client side and a dedicated range of ports on the

server side. With regular port forwarding, you set a forwarding port in NAT to forward a service (coming

in from the server on the WAN) to the IP address of a computer on the client side (LAN). The problem is

that port forwarding only forwards a service to a single LAN IP address. In order to use the same service

on a different LAN computer, you have to manually replace the LAN computer's IP address in the

forwarding port with another LAN computer's IP address.

Trigger port forwarding allows computers on the LAN to dynamically take turns using the service.

The Zyxel Device records the IP address of a LAN computer that sends traffic to the WAN to request a

service with a specific port number and protocol (a \"trigger\" port). When the Zyxel Device's WAN port

receives a response with a specific port number and protocol (\"open\" port), the Zyxel Device forwards

the traffic to the LAN IP address of the computer that sent the request. After that computer’s

connection for that service closes, another computer on the LAN can use the service in the same

manner. This way you do not need to configure a new IP address each time you want a different LAN

computer to use the application.

For example:

Start Port

Configure this for a user-defined entry. Enter the original destination port for the packets.

To forward only one port, enter the port number again in the

End Port

field.

To forward a series of ports, enter the start port number here and the end port number in the

End Port

field.

End Port

Configure this for a user-defined entry. Enter the last port of the original destination port range.

To forward only one port, enter the port number in the

Start

Port

field above and then enter it

again in this field.

To forward a series of ports, enter the last port number in a series that begins with the port

number in the

Start Port

field above.

Translation Start

Port

Configure this for a user-defined entry. This shows the port number to which you want the Zyxel

Device to translate the incoming port. For a range of ports, enter the first number of the range

to which you want the incoming ports translated.

Translation End

Port

Configure this for a user-defined entry. This shows the last port of the translated port range.

Server IP Address

Enter the inside IP address of the virtual server here.

Configure

Originating IP

Click the

Enable

check box to enter the originating IP in the next field.

Originating IP

Enter the originating IP address here.

Protocol

Select the protocol supported by this virtual server. Choices are

TCP

UDP

, or

TCP/UDP

Click this to save your changes.

Cancel

Click this to exit this screen without saving.

Table 34

Port Forwarding: Add/Edit (continued)

LABEL

DESCRIPTION