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Trigger Ports, include a SIP Application Layer Gateway ALG. An Application Layer Gateway ALG manages

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Chapter 7 Network Setting 192.168.1.35 to a third (C in the example). You assign the LAN IP addresses and the ISP assigns the WAN IP address. The NAT network appears as a single host on the Internet. Figure 42 Multiple Servers Behind NAT Example Trigger Ports 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 solves this problem by allowing computers on the LAN to dynamically take turns using the service. The WiMAX 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 WiMAX Device's WAN port receives a response with a specific port number and protocol ("incoming" port), the WiMAX 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. ALG Some applications, such as SIP, cannot operate through NAT (are NAT un-friendly) because they embed IP addresses and port numbers in their packets' data payload. Some NAT routers may include a SIP Application Layer Gateway (ALG). An Application Layer Gateway (ALG) manages a specific protocol (such as SIP, H.323 or FTP) at the application layer. A SIP ALG allows SIP calls to pass through NAT by examining and translating IP addresses embedded in the data stream. UPnP Universal Plug and Play (UPnP) is a distributed, open networking standard that uses TCP/IP for simple peer-to-peer network connectivity between devices. A UPnP device can dynamically join a network, obtain an IP address, convey its capabilities and learn about other devices on the network. In turn, a device can leave a network smoothly and automatically when it is no longer in use. How do I know if I'm using UPnP? WiMAX Device Configuration User's Guide 93

Section	Page
WiMAX CPE Series	1
About This User's Guide	3
Document Conventions	4
Safety Warnings	6
Contents Overview	7
Table of Contents	9
User’s Guide	15
Introduction to the Series	17
1.1 About Your WiMAX Device	17
1.1.1 WiMAX Internet Access	18
1.1.2 Models with Phone Ports	18
1.1.3 Models with WiFi	19
1.2 Good Habits for Managing the WiMAX Device	19
Introduction to the Web Configurator	20
2.1 Overview	20
2.1.1 Accessing the Web Configurator	20
2.1.2 Saving and Canceling Changes	21
2.1.3 Working with Tables	21
2.2 The Main Screen	22
Setup Wizard	25
3.1 Overview	25
3.1.1 Welcome to the Setup Wizard	25
3.1.2 LAN Settings	26
3.1.3 WiMAX Frequency Settings	27
3.1.4 WiMAX Authentication Settings	28
3.1.5 VoIP Settings	30
3.1.6 WLAN Settings	32
3.1.7 Setup Complete	34
Tutorials	35
4.1 Overview	35
4.2 WiMAX Connection Settings	35
4.3 Setting Up a Small Network for the LAN	36
4.4 Making a Telephone Call Over the Internet	38
4.4.1 Configure Your SIP Account	38
4.5 Blocking Web Access from the WiMAX Device	40
4.6 Restricting Wireless Access to the WiMAX Device	40
4.7 Allowing Internet Users to use Internal Servers	42
4.8 Access the WiMAX Device with a Domain Name	44
4.8.1 Registering a DDNS Account on www.dyndns.org	45
4.8.2 Configuring DDNS on Your WiMAX Device	46
4.8.3 Testing the DDNS Setting	46
4.9 Configuring Static Route for Routing to Another Network	46
4.10 Remotely Managing Your WiMAX Device	48
4.11 Changing Certificate to Communicate with Other Networks	49
4.12 Using Virtual Networks	50
4.12.1 Scenario 1	51
4.12.2 Scenario 2	52
4.12.3 Scenario 3	54
4.12.4 Scenario 4	56
4.12.5 Scenario 5	58
Technical Reference	61
System Status	63
5.1 Overview	63
5.2 System Status	63
WiMAX	67
6.1 Overview	67
6.1.1 What You Need to Know	67
6.2 Connection Settings	70
6.3 Frequency Settings	72
6.4 Authentication Settings	74
6.5 Channel Plan Settings	77
6.6 CAPL Settings	79
6.6.1 CAPL Settings: Add	80
6.7 RAPL Settings	81
6.8 Home NSP Settings	82
6.9 Connect	83
6.10 Wide Scan	85
6.11 Link Status	87
6.12 Link Statistics	88
6.13 Connection Info	89
6.14 Service Flow	89
Network Setting	91
7.1 Overview	91
7.1.1 What You Need to Know	91
7.2 WAN	94
7.3 PPPoE	96
7.4 GRE	97
7.5 EtherIP	98
7.6 IP	98
7.7 DHCP	99
7.8 WLAN	100
7.9 WPS	102
7.10 MAC Address Filter	103
7.11 Static Route	104
7.12 Static Route Add	104
7.13 RIP	105
7.14 Port Forwarding	107
7.14.1 Port Forwarding Wizard	108
7.15 Port Trigger	108
7.15.1 Port Trigger Wizard	110
7.15.2 Trigger Port Forwarding Example	111
7.16 DMZ	111
7.17 ALG	112
7.18 QoS	113
7.19 UPnP	113
7.19.1 Installing UPnP in Windows XP	114
7.19.2 Web Configurator Easy Access	118
7.20 VLAN	119
7.21 DDNS	121
7.22 IGMP Proxy	123
7.23 Content Filter	123
Security	125
8.1 Overview	125
8.1.1 What You Need to Know	125
8.2 IP Filter	125
8.3 MAC Filter	126
8.4 DDOS	127
8.5 PPTP VPN Server	129
8.6 PPTP VPN Client	130
8.7 PPTP VPN Client: Add	131
8.8 L2TP VPN Server	133
8.9 L2TP VPN Client	135
8.10 L2TP VPN Client: Add	135
8.11 IPSec VPN	137
8.11.1 IPSec VPN: Add	139
8.12 Technical Reference	144
8.12.1 IPSec Architecture	144
8.12.2 Encapsulation	145
8.12.3 IKE Phases	146
8.12.4 Negotiation Mode	147
8.12.5 IPSec and NAT	147
8.12.6 VPN, NAT, and NAT Traversal	148
8.12.7 ID Type and Content	148
8.12.8 Pre-Shared Key	150
8.12.9 Diffie-Hellman (DH) Key Groups	150
The VoIP General Screens	151
9.1 VoIP Overview	151
9.1.1 What You Need to Know	151
9.1.2 Before you Begin	152
9.2 Media	153
9.3 QoS	154
9.4 SIP Settings	155
9.5 Speed Dial	155
9.6 Technical Reference	156
9.6.1 DSCP and Per-Hop Behavior	156
The VoIP Account Screens	157
10.1 Overview	157
10.1.1 What You Need to Know	157
10.2 Status	160
10.3 Server	161
10.4 SIP	163
10.5 Feature	165
10.6 Dialing	166
10.7 FAX	167
10.8 Technical Reference	167
10.8.1 SIP Call Progression with Session Timer	167
10.8.2 SIP Client Server	170
The VoIP Line Screens	171
11.1 Overview	171
11.1.1 What You Need to Know	171
11.2 Phone	172
11.3 Voice	172
11.4 Region	173
Maintenance	175
12.1 Overview	175
12.1.1 What You Need to Know	175
12.2 Password	180
12.3 HTTP	181
12.4 Telnet	181
12.5 SSH	182
12.6 SNMP	183
12.7 CWMP	183
12.8 OMA-DM	185
12.9 Date/Time	187
12.10 Time Zone	187
12.11 Upgrade File	188
12.11.1 The Firmware Upload Process	189
12.12 Upgrade Link	189
12.13 CWMP Upgrade	189
12.14 Backup/Restore	190
12.15 Restore	190
12.15.1 The Restore Configuration Process	191
12.16 Factory Defaults	191
12.17 Log Setting	192
12.18 Log Display	192
12.19 Network Test	193
12.20 Traceroute	194
12.21 About	194
12.22 Reboot	195
Troubleshooting	197
13.1 Power, Hardware Connections, and LEDs	197
13.2 WiMAX Device Access and Login	198
13.3 Internet Access	199
13.4 Wireless Internet Access (for Models with WiFi)	201
13.5 Phone Calls and VoIP (for Models with Phone Ports)	201
13.6 Reset the WiMAX Device to Its Factory Defaults	202
13.6.1 Pop-up Windows, JavaScript and Java Permissions	202
Product Specifications	203
WiMAX Security	207
Importing Certificates	211
Common Services	237
Open Software Announcements	241
Legal Information	277

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Chapter 7 Network Setting

WiMAX Device Configuration User’s Guide

192.168.1.35 to a third (C in the example). You assign the LAN IP addresses and the ISP assigns

the WAN IP address. The NAT network appears as a single host on the Internet.

Figure 42

Multiple Servers Behind NAT Example

Trigger Ports

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 solves this problem by allowing computers on the LAN to dynamically take

turns using the service. The WiMAX 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 WiMAX Device's WAN port receives a response with a specific port number and protocol

("incoming" port), the WiMAX 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.

ALG

Some applications, such as SIP, cannot operate through NAT (are NAT un-friendly) because they

embed IP addresses and port numbers in their packets’ data payload. Some NAT routers may

include a SIP Application Layer Gateway (ALG). An Application Layer Gateway (ALG) manages a

specific protocol (such as SIP, H.323 or FTP) at the application layer.

A SIP ALG allows SIP calls to pass through NAT by examining and translating IP addresses

embedded in the data stream.

UPnP

Universal Plug and Play (UPnP) is a distributed, open networking standard that uses TCP/IP for

simple peer-to-peer network connectivity between devices. A UPnP device can dynamically join a

network, obtain an IP address, convey its capabilities and learn about other devices on the network.

In turn, a device can leave a network smoothly and automatically when it is no longer in use.

How do I know if I'm using UPnP?