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DHCP Setup, DNS Server Addresses, LAN TCP/IP

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Chapter 8 Home Networking 8.9.2 DHCP Setup DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual clients to obtain TCP/IP configuration at start-up from a server. You can configure the VMG as a DHCP server or disable it. When configured as a server, the VMG provides the TCP/IP configuration for the clients. If you turn DHCP service off, you must have another DHCP server on your LAN, or else the computer must be manually configured. IP Pool Setup The VMG is pre-configured with a pool of IP addresses for the DHCP clients (DHCP Pool). See the product specifications in the appendices. Do not assign static IP addresses from the DHCP pool to your LAN computers. 8.9.3 DNS Server Addresses DNS (Domain Name System) maps a domain name to its corresponding IP address and vice versa. The DNS server is extremely important because without it, you must know the IP address of a computer before you can access it. The DNS server addresses you enter when you set up DHCP are passed to the client machines along with the assigned IP address and subnet mask. There are two ways that an ISP disseminates the DNS server addresses. • The ISP tells you the DNS server addresses, usually in the form of an information sheet, when you sign up. If your ISP gives you DNS server addresses, enter them in the DNS Server fields in the DHCP Setup screen. • Some ISPs choose to disseminate the DNS server addresses using the DNS server extensions of IPCP (IP Control Protocol) after the connection is up. If your ISP did not give you explicit DNS servers, chances are the DNS servers are conveyed through IPCP negotiation. The VMG supports the IPCP DNS server extensions through the DNS proxy feature. Please note that DNS proxy works only when the ISP uses the IPCP DNS server extensions. It does not mean you can leave the DNS servers out of the DHCP setup under all circumstances. If your ISP gives you explicit DNS servers, make sure that you enter their IP addresses in the DHCP Setup screen. 8.9.4 LAN TCP/IP The VMG has built-in DHCP server capability that assigns IP addresses and DNS servers to systems that support DHCP client capability. IP Address and Subnet Mask Similar to the way houses on a street share a common street name, so too do computers on a LAN share one common network number. Where you obtain your network number depends on your particular situation. If the ISP or your network administrator assigns you a block of registered IP addresses, follow their instructions in selecting the IP addresses and the subnet mask. If the ISP did not explicitly give you an IP network number, then most likely you have a single user account and the ISP will assign you a dynamic IP address when the connection is established. If this is the case, it is recommended that you select a network number from 192.168.0.0 to 192.168.255.0 and VMG4927-B50A / VMG9827-B50A User's Guide 127

Section	Page
VMG4927-B50A / VMG9827-B50A	1
Document Conventions	3
Contents Overview	4
Table of Contents	6
User’s Guide	15
VMG Introduction	16
1.1 Overview	16
1.1.1 Internet Access	16
1.1.2 Wireless Access	20
1.1.3 VoIP Features	20
1.2 Ways to Manage the VMG	21
1.3 Good Habits for Managing the VMG	21
1.4 Hardware	21
1.4.1 Front Panels	21
1.4.2 WPS Button	23
1.4.3 LEDs (Lights)	24
1.4.4 Rear Panel	26
1.4.5 RESET Button	27
1.4.6 Wall Mounting	27
The Web Configurator	29
2.1 Overview	29
2.1.1 Access the Web Configurator	29
2.2 Web Configurator Layout	31
2.2.1 Title Bar	31
2.2.2 Navigation Panel	32
Quick Start	36
3.1 Overview	36
3.2 Quick Start Setup	36
Tutorials	39
4.1 Overview	39
4.2 Set Up an ADSL PPPoE Connection	39
4.3 Set Up a Secure WiFi Network	42
4.3.1 Configure the WiFi Network Settings	42
4.3.2 Use WPS	44
4.3.3 Connect to the VMG’s WiFi Network Manually (No WPS)	46
4.3.4 Configure Wireless Security on the VMG	46
4.3.5 Configure Your Laptop	48
4.4 Set Up Multiple Wireless Groups	50
4.5 Configure Static Route for Routing to Another Network	53
4.6 Configure QoS Queue and Class Setup	55
4.7 Access the VMG Using DDNS	59
4.7.1 Register a DDNS Account on www.dyndns.org	59
4.7.2 Configure DDNS on Your VMG	60
4.7.3 Test the DDNS Setting	60
4.8 Configure the MAC Address Filter	60
Technical Reference	62
Network Map and Status Screens	63
5.1 Overview	63
5.2 Network Map	63
5.3 Status	65
Broadband	68
6.1 Overview	68
6.1.1 What You Can Do in this Chapter	68
6.1.2 What You Need to Know	69
6.1.3 Before You Begin	71
6.2 Broadband	72
6.2.1 Add/Edit Internet Connection	73
6.3 Advanced Settings	81
6.4 Ethernet WAN	84
6.5 Technical Reference	84
Wireless	90
7.1 Overview	90
7.1.1 What You Can Do in this Chapter	90
7.1.2 What You Need to Know	90
7.2 WiFi	91
7.2.1 WiFi Edit	91
7.3 Guest WiFi	93
7.3.1 Edit Guest WiFi	93
7.4 WPS	94
7.5 Advanced Settings	95
7.6 Channel Status	98
7.7 MESH	100
7.8 Technical Reference	102
7.8.1 Wireless Network Overview	102
7.8.2 Additional Wireless Terms	104
7.8.3 Wireless Security Overview	104
7.8.4 Signal Problems	106
7.8.5 BSS	106
7.8.6 MBSSID	107
7.8.7 Preamble Type	107
7.8.8 WiFi Protected Setup (WPS)	107
Home Networking	113
8.1 Overview	113
8.1.1 What You Can Do in this Chapter	113
8.1.2 What You Need To Know	114
8.1.3 Before You Begin	115
8.2 LAN Setup	115
8.3 Static DHCP	119
8.4 UPnP	120
8.4.1 Turn On UPnP in Windows 7 Example	121
8.5 Additional Subnet	123
8.6 STB Vendor ID	124
8.7 Wake on LAN	125
8.8 TFTP Server Name	125
8.9 Technical Reference	126
8.9.1 LANs, WANs and the VMG	126
8.9.2 DHCP Setup	127
8.9.3 DNS Server Addresses	127
8.9.4 LAN TCP/IP	127
Routing	129
9.1 Overview	129
9.2 Routing	129
9.2.1 Add/Edit Static Route	130
9.3 DNS Route	131
9.3.1 DNS Route Add	132
9.4 Policy Route	133
9.4.1 Add/Edit Policy Route	134
9.5 RIP Overview	135
9.5.1 RIP	135
Quality of Service (QoS)	137
10.1 Overview	137
10.1.1 What You Can Do in this Chapter	137
10.2 What You Need to Know	138
10.3 Quality of Service General Settings	139
10.4 Queue Setup	140
10.4.1 Adding a QoS Queue	142
10.5 Classification Setup	143
10.5.1 Add/Edit QoS Class	143
10.6 QoS Shaper Setup	147
10.6.1 Add/Edit a QoS Shaper	148
10.7 QoS Policer Setup	148
10.7.1 Add/Edit a QoS Policer	149
10.8 QoS Monitor	150
10.9 Technical Reference	151
Network Address Translation (NAT)	156
11.1 Overview	156
11.1.1 What You Can Do in this Chapter	156
11.1.2 What You Need To Know	156
11.2 Port Forwarding	157
11.2.1 Add/Edit Port Forwarding	159
11.3 Applications Settings	160
11.3.1 Add New Application	161
11.4 Port Triggering	162
11.4.1 Add/Edit Port Triggering Rule	163
11.5 DMZ	164
11.6 ALG	165
11.7 Address Mapping	166
11.7.1 Add/Edit Address Mapping Rule	167
11.8 Sessions	168
11.9 Technical Reference	169
11.9.1 NAT Definitions	169
11.9.2 What NAT Does	169
11.9.3 How NAT Works	170
11.9.4 NAT Application	170
Dynamic DNS Setup	173
12.1 Overview	173
12.1.1 What You Can Do in this Chapter	173
12.1.2 What You Need To Know	173
12.2 DNS Entry	174
12.2.1 Add/Edit DNS Entry	174
12.3 Dynamic DNS	175
IGMP/MLD	177
13.1 Overview	177
13.1.1 What You Need To Know	177
13.2 IGMP/MLD	177
VLAN Group	180
14.1 Overview	180
14.1.1 What You Can Do in this Chapter	180
14.2 VLAN Group	180
14.2.1 Add/Edit a VLAN Group	181
Interface Grouping	182
15.1 Overview	182
15.1.1 What You Can Do in this Chapter	182
15.2 Interface Grouping Overview	182
15.2.1 Interface Grouping Configuration	183
15.2.2 Interface Grouping Criteria	185
Firewall	187
16.1 Overview	187
16.1.1 What You Can Do in this Chapter	187
16.1.2 What You Need to Know	188
16.2 Firewall	188
16.3 Protocol	189
16.3.1 Add/Edit a Service	190
16.4 Access Control	191
16.4.1 Add/Edit an ACL Rule	192
16.5 DoS	193
MAC Filter	195
17.1 Overview	195
17.2 MAC Filter	195
Parental Control	197
18.1 Overview	197
18.2 Parental Control	197
18.2.1 Add/Edit a Parental Control Profile	198
Scheduler Rule	201
19.1 Overview	201
19.2 Scheduler Rule	201
19.2.1 Add/Edit a Schedule	201
Certificates	203
20.1 Overview	203
20.1.1 What You Can Do in this Chapter	203
20.2 What You Need to Know	203
20.3 Local Certificates	203
20.3.1 Create Certificate Request	204
20.3.2 View Certificate Request	205
20.4 Trusted CA	206
20.4.1 View Trusted CA Certificate	207
20.4.2 Import Trusted CA Certificate	208
Voice	210
21.1 Overview	210
21.1.1 What You Can Do in this Chapter	210
21.1.2 What You Need to Know About VoIP	210
21.2 Before You Begin	211
21.3 SIP Account	211
21.3.1 SIP Account Add/Edit	212
21.4 SIP Service Provider	216
21.4.1 SIP Service Provider Add/Edit	217
21.5 Phone Device	221
21.5.1 Phone Device Edit	222
21.6 Region	223
21.7 Call Rule	223
21.8 Technical Reference	224
21.8.1 Quality of Service (QoS)	232
21.8.2 Phone Services Overview	232
Log	237
22.1 Overview	237
22.1.1 What You Can Do in this Chapter	237
22.1.2 What You Need To Know	237
22.2 System Log	238
22.3 Security Log	239
Traffic Status	240
23.1 Overview	240
23.1.1 What You Can Do in this Chapter	240
23.2 WAN Status	240
23.3 LAN Status	241
23.4 NAT Status	242
ARP Table	244
24.1 Overview	244
24.1.1 How ARP Works	244
24.2 ARP Table	244
Routing Table	246
25.1 Overview	246
25.2 Routing Table	246
Multicast Status	248
26.1 Overview	248
26.2 IGMP Status	248
26.3 MLD Status	248
xDSL Statistics	250
27.1 xDSL Statistics	250
System	253
28.1 Overview	253
28.2 System	253
User Account	254
29.1 Overview	254
29.2 User Account	254
29.2.1 User Account Add/Edit	255
Remote Management	256
30.1 Overview	256
30.2 MGMT Services	256
30.3 Trust Domain	257
30.3.1 Add Trust Domain	258
SNMP	259
31.1 Overview	259
31.2 SNMP	259
Time Settings	261
32.1 Overview	261
32.2 Time	261
Email Notification	263
33.1 Overview	263
33.2 Email Notification	263
33.2.1 Email Notification Edit	264
Log Setting	265
34.1 Overview	265
34.2 Log Settings	265
34.2.1 Example Email Log	266
Firmware Upgrade	268
35.1 Overview	268
35.2 Firmware	268
Backup/Restore	270
36.1 Overview	270
36.2 Backup/Restore	270
36.3 Reboot	272
Diagnostic	273
37.1 Overview	273
37.1.1 What You Can Do in this Chapter	273
37.2 What You Need to Know	273
37.3 Ping & TraceRoute & NsLookup	274
37.4 802.1ag	274
37.5 802.3ah	276
37.6 OAM Ping	277
Troubleshooting	279
38.1 Power, Hardware Connections, and LEDs	279
38.2 VMG Access and Login	280
38.3 Internet Access	281
38.4 Wireless Internet Access	283
38.5 UPnP	284
38.6 VoIP Call Quality	284
Appendices	286
Customer Support	287
Wireless LANs	293
IPv6	303
Services	311
Legal Information	315

Match case Limit results 1 per page

Chapter 8 Home Networking

VMG4927-B50A / VMG9827-B50A User’s Guide

127

8.9.2

DHCP Setup

DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual clients to obtain

TCP/IP configuration at start-up from a server. You can configure the VMG as a DHCP server or disable it.

When configured as a server, the VMG provides the TCP/IP configuration for the clients. If you turn DHCP

service off, you must have another DHCP server on your LAN, or else the computer must be manually

configured.

IP Pool Setup

The VMG is pre-configured with a pool of IP addresses for the DHCP clients (DHCP Pool). See the product

specifications in the appendices. Do not assign static IP addresses from the DHCP pool to your LAN

computers.

8.9.3

DNS Server Addresses

DNS (Domain Name System) maps a domain name to its corresponding IP address and vice versa. The

DNS server is extremely important because without it, you must know the IP address of a computer

before you can access it. The DNS server addresses you enter when you set up DHCP are passed to the

client machines along with the assigned IP address and subnet mask.

There are two ways that an ISP disseminates the DNS server addresses.

•

The ISP tells you the DNS server addresses, usually in the form of an information sheet, when you sign

up. If your ISP gives you DNS server addresses, enter them in the

DNS Server

fields in the

DHCP Setup

screen.

•

Some ISPs choose to disseminate the DNS server addresses using the DNS server extensions of IPCP (IP

Control Protocol) after the connection is up. If your ISP did not give you explicit DNS servers, chances

are the DNS servers are conveyed through IPCP negotiation. The VMG supports the IPCP DNS server

extensions through the DNS proxy feature.

Please note that DNS proxy works only when the ISP uses the IPCP DNS server extensions. It does not

mean you can leave the DNS servers out of the DHCP setup under all circumstances. If your ISP gives

you explicit DNS servers, make sure that you enter their IP addresses in the

DHCP Setup

screen.

8.9.4

LAN TCP/IP

The VMG has built-in DHCP server capability that assigns IP addresses and DNS servers to systems that

support DHCP client capability.

IP Address and Subnet Mask

Similar to the way houses on a street share a common street name, so too do computers on a LAN share

one common network number.

Where you obtain your network number depends on your particular situation. If the ISP or your network

administrator assigns you a block of registered IP addresses, follow their instructions in selecting the IP

addresses and the subnet mask.

If the ISP did not explicitly give you an IP network number, then most likely you have a single user

account and the ISP will assign you a dynamic IP address when the connection is established. If this is

the case, it is recommended that you select a network number from 192.168.0.0 to 192.168.255.0 and