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Dynamic DNS

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CHAPTER 11 Dynamic DNS 11.1 Dynamic DNS Introduction Dynamic DNS allows you to update your current dynamic IP address with one or many dynamic DNS services so that anyone can contact you (in NetMeeting, CU-SeeMe, etc.). You can also access your FTP server or Web site on your own computer using a domain name (for instance myhost.dhs.org, where myhost is a name of your choice) that will never change instead of using an IP address that changes each time you reconnect. Your friends or relatives will always be able to call you even if they don't know your IP address. First of all, you need to have registered a dynamic DNS account with www.dyndns.org. This is for people with a dynamic IP from their ISP or DHCP server that would still like to have a domain name. The Dynamic DNS service provider will give you a password or key. 11.1.1 DynDNS Wildcard Enabling the wildcard feature for your host causes *.yourhost.dyndns.org to be aliased to the same IP address as yourhost.dyndns.org. This feature is useful if you want to be able to use, for example, www.yourhost.dyndns.org and still reach your hostname. " If you have a private WAN IP address, then you cannot use Dynamic DNS. 11.2 Dynamic DNS Screen To change your NBG334W's DDNS, click Network > DDNS. The screen appears as shown. NBG334W User's Guide 123

Section	Page
User’s Guide	1
About This User's Guide	3
Document Conventions	5
Safety Warnings	7
Contents Overview	9
Table of Contents	11
List of Figures	19
List of Tables	23
Introduction	27
Getting to Know Your NBG334W	29
1.1 Overview	29
1.2 AP Mode	29
1.3 Router Mode	30
1.4 Router Features vs. AP Features	30
1.5 Ways to Manage the NBG334W	31
1.6 Good Habits for Managing the NBG334W	31
1.7 LEDs	31
Introducing the Web Configurator	33
2.1 Web Configurator Overview	33
2.2 Accessing the Web Configurator	33
2.3 Resetting the NBG334W	35
2.3.1 Procedure to Use the Reset Button	35
2.4 Navigating the Web Configurator	35
2.5 The Status Screen in Router Mode	35
2.5.1 Navigation Panel	38
2.5.2 Summary: Any IP Table	40
2.5.3 Summary: Bandwidth Management Monitor	40
2.5.4 Summary: DHCP Table	41
2.5.5 Summary: Packet Statistics	41
2.5.6 Summary: Wireless Station Status	42
Connection Wizard	45
3.1 Wizard Setup	45
3.2 Connection Wizard: STEP 1: System Information	46
3.2.1 System Name	46
3.2.2 Domain Name	47
3.3 Connection Wizard: STEP 2: Wireless LAN	47
3.3.1 Basic (WEP) Security	49
3.3.2 Extend (WPA-PSK or WPA2-PSK) Security	50
3.4 Connection Wizard: STEP 3: Internet Configuration	50
3.4.1 Ethernet Connection	51
3.4.2 PPPoE Connection	51
3.4.3 PPTP Connection	52
3.4.4 Your IP Address	54
3.4.5 WAN IP Address Assignment	54
3.4.6 IP Address and Subnet Mask	55
3.4.7 DNS Server Address Assignment	55
3.4.8 WAN IP and DNS Server Address Assignment	56
3.4.9 WAN MAC Address	57
3.5 Connection Wizard: STEP 4: Bandwidth management	58
3.6 Connection Wizard Complete	58
AP Mode	61
4.1 AP Mode Overview	61
4.2 Setting your NBG334W to AP Mode	61
4.3 The Status Screen in AP Mode	62
4.3.1 Navigation Panel	64
4.4 Configuring Your Settings	65
4.4.1 LAN Settings	65
4.4.2 WLAN and Maintenance Settings	66
4.5 Logging in to the Web Configurator in AP Mode	66
Network	67
Wireless LAN	69
5.1 Wireless Network Overview	69
5.2 Wireless Security Overview	71
5.2.1 SSID	71
5.2.2 MAC Address Filter	71
5.2.3 User Authentication	72
5.2.4 Encryption	72
5.3 Roaming	73
5.3.1 Requirements for Roaming	74
5.4 Quality of Service	74
5.4.1 WMM QoS	75
5.5 General Wireless LAN Screen	75
5.5.1 No Security	76
5.5.2 WEP Encryption	77
5.5.3 WPA-PSK/WPA2-PSK	79
5.5.4 WPA/WPA2	80
5.6 MAC Filter	82
5.7 Wireless LAN Advanced Screen	83
5.8 Quality of Service (QoS) Screen	84
5.8.1 Application Priority Configuration	86
Wireless Tutorial	89
6.1 How to Connect to the Internet from a Notebook	89
6.1.1 Example Parameters	89
6.2 Enable and Configure Wireless Security on your NBG334W	89
6.3 Configure Your Notebook	91
WAN	93
7.1 WAN Overview	93
7.2 WAN MAC Address	93
7.3 Multicast	93
7.4 Internet Connection	94
7.4.1 Ethernet Encapsulation	94
7.4.2 PPPoE Encapsulation	95
7.4.3 PPTP Encapsulation	98
7.5 Advanced WAN Screen	101
LAN	103
8.1 LAN Overview	103
8.1.1 IP Pool Setup	103
8.1.2 System DNS Servers	103
8.2 LAN TCP/IP	103
8.2.1 Factory LAN Defaults	103
8.2.2 IP Address and Subnet Mask	104
8.2.3 Multicast	104
8.2.4 Any IP	104
8.3 LAN IP Screen	106
8.4 LAN IP Alias	106
8.5 Advanced LAN Screen	107
DHCP	109
9.1 DHCP	109
9.2 DHCP Server General Screen	109
9.3 DHCP Server Advanced Screen	110
9.4 Client List Screen	111
Network Address Translation (NAT)	113
10.1 NAT Overview	113
10.2 Using NAT	113
10.2.1 Port Forwarding: Services and Port Numbers	113
10.2.2 Configuring Servers Behind Port Forwarding Example	114
10.3 General NAT Screen	114
10.4 NAT Application Screen	115
10.4.1 Game List Example	117
10.5 Trigger Port Forwarding	118
10.5.1 Trigger Port Forwarding Example	118
10.5.2 Two Points To Remember About Trigger Ports	119
10.6 NAT Advanced Screen	119
Dynamic DNS	123
11.1 Dynamic DNS Introduction	123
11.1.1 DynDNS Wildcard	123
11.2 Dynamic DNS Screen	123
Security	125
Firewall	127
12.1 Introduction to ZyXEL’s Firewall	127
12.1.1 What is a Firewall?	127
12.1.2 Stateful Inspection Firewall	127
12.1.3 About the NBG334W Firewall	127
12.1.4 Guidelines For Enhancing Security With Your Firewall	128
12.2 Triangle Routes	128
12.2.1 Triangle Routes and IP Alias	128
12.3 General Firewall Screen	129
12.4 Services Screen	130
Content Filtering	133
13.1 Introduction to Content Filtering	133
13.2 Restrict Web Features	133
13.3 Days and Times	133
13.4 Filter Screen	133
13.5 Schedule	135
13.6 Customizing Keyword Blocking URL Checking	136
13.6.1 Domain Name or IP Address URL Checking	136
13.6.2 Full Path URL Checking	136
13.6.3 File Name URL Checking	136
Management	137
Static Route Screens	139
14.1 Static Route Overview	139
14.2 IP Static Route Screen	139
14.2.1 Static Route Setup Screen	140
Bandwidth Management	143
15.1 Bandwidth Management Overview	143
15.2 Application-based Bandwidth Management	143
15.3 Subnet-based Bandwidth Management	143
15.4 Application and Subnet-based Bandwidth Management	144
15.5 Bandwidth Management Priorities	144
15.6 Predefined Bandwidth Management Services	145
15.6.1 Services and Port Numbers	146
15.7 Default Bandwidth Management Classes and Priorities	148
15.8 Bandwidth Management General Configuration	149
15.9 Bandwidth Management Advanced Configuration	149
15.9.1 Rule Configuration	151
15.10 Bandwidth Management Monitor	152
Remote Management	153
16.1 Remote Management Overview	153
16.1.1 Remote Management Limitations	153
16.1.2 Remote Management and NAT	154
16.1.3 System Timeout	154
16.2 WWW Screen	154
16.3 Telnet	155
16.4 Telnet Screen	155
16.5 FTP Screen	156
16.6 DNS Screen	157
Universal Plug-and-Play (UPnP)	159
17.1 Introducing Universal Plug and Play	159
17.1.1 How do I know if I'm using UPnP?	159
17.1.2 NAT Traversal	159
17.1.3 Cautions with UPnP	159
17.2 UPnP and ZyXEL	160
17.3 UPnP Screen	160
17.4 Installing UPnP in Windows Example	161
Maintenance and Troubleshooting	171
System	173
18.1 System Overview	173
18.2 System General Screen	173
18.3 Time Setting Screen	174
Logs	177
19.1 View Log	177
19.2 Log Settings	178
19.3 Log Descriptions	181
Tools	191
20.1 Firmware Upload Screen	191
20.2 Configuration Screen	192
20.2.1 Backup Configuration	193
20.2.2 Restore Configuration	193
20.2.3 Back to Factory Defaults	194
20.3 Restart Screen	194
Configuration Mode	197
Sys Op Mode	199
22.1 Overview	199
22.1.1 Router	199
22.1.2 AP	199
22.2 Selecting System Operation Mode	200
Troubleshooting	203
23.1 Power, Hardware Connections, and LEDs	203
23.2 NBG334W Access and Login	204
23.3 Internet Access	206
23.4 Resetting the NBG334W to Its Factory Defaults	207
23.5 Wireless Router/AP Troubleshooting	207
23.6 Advanced Features	208
Appendices and Index	209
Product Specifications and Wall- Mounting Instructions	211
Pop-up Windows, JavaScripts and Java Permissions	217
IP Addresses and Subnetting	223
Setting up Your Computer’s IP Address	231
23.6.1 Verifying Settings	246
Wireless LANs	247
23.6.2 WPA(2)-PSK Application Example	256
23.6.3 WPA(2) with RADIUS Application Example	256
Services	259
Legal Information	263

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NBG334W User’s Guide

123

HAPTER

Dynamic DNS

11.1

Dynamic DNS Introduction

Dynamic DNS allows you to update your current dynamic IP address with one or many

dynamic DNS services so that anyone can contact you (in NetMeeting, CU-SeeMe, etc.). You

can also access your FTP server or Web site on your own computer using a domain name (for

instance myhost.dhs.org, where myhost is a name of your choice) that will never change

instead of using an IP address that changes each time you reconnect. Your friends or relatives

will always be able to call you even if they don't know your IP address.

First of all, you need to have registered a dynamic DNS account with www.dyndns.org. This is

for people with a dynamic IP from their ISP or DHCP server that would still like to have a

domain name. The Dynamic DNS service provider will give you a password or key.

11.1.1

DynDNS Wildcard

Enabling the wildcard feature for your host causes *.yourhost.dyndns.org to be aliased to the

same IP address as yourhost.dyndns.org. This feature is useful if you want to be able to use,

for example, www.yourhost.dyndns.org and still reach your hostname.

If you have a private WAN IP address, then you cannot use Dynamic DNS.

11.2

Dynamic DNS Screen

To change your NBG334W’s DDNS, click

Network > DDNS

. The screen appears as shown.