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Page 136 / 202 Scroll up to view Page 131 - 135
Manage the WAN and LAN
Network Settings
136
N600 and AC750 WiFi DSL Modem Routers
Manage IGMP Proxying and VPN Pass-Through
IGMP proxying allows a computer on the local area network (LAN) to receive the multicast
traffic it is interested in from the Internet. If you do not need this feature, leave it disabled,
which is the default setting.
When Network Address Translation (NAT) is enabled in the modem router (see
Manually Set
Up the Internet Connection
on page
44), it filters encrypted tunnel packets through NAT,
causing these packets to become invalid. VPN pass-through allows encrypted tunnel packets
to go through without being filtered and is enabled by default for IPSec, PPTP, and L2TP
packets. Do not disable VPN pass-through for IPSec, PPTP, or L2TP unless a specific reason
exists.
To change the default IGMP proxying and VPN pass-through settings:
1.
Launch an Internet browser from a computer or WiFi device that is connected to the
network.
2.
Type
.
A login screen displays.
3.
Enter the user name and password for the modem router.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Setup > WAN Setup
.
The WAN Setup screen displays.
6.
To enable IGMP proxying, clear the
Disable IGMP Proxying
check box.
By default, the
Disable IGMP Proxying
check box is selected and IGMP proxying is
disabled.
7.
To disable VPN pass-through for one or more protocols, select the corresponding
Disable
radio buttons in the VPN Passthrough section.
By default, the VPN pass-through is enabled for all protocols for which the modem router
supports pass-through (IPSec, PPT, and L2TP).
8.
Click the
Apply
button.
Your settings are saved.
Page 137 / 202
Manage the WAN and LAN
Network Settings
137
N600 and AC750 WiFi DSL Modem Routers
Manage NAT Filtering
Network Address Translation (NAT) determines how the modem router processes inbound
traffic. Secured NAT protects computers on the LAN from attacks from the Internet but might
prevent some Internet games, point-to-point applications, or multimedia applications from
working. Open NAT provides a much less secured firewall but allows almost all Internet
applications to work. Secured NAT is the default setting.
To change the default NAT filtering settings:
1.
Launch an Internet browser from a computer or WiFi device that is connected to the
network.
2.
Type
.
A login screen displays.
3.
Enter the user name and password for the modem router.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Setup > WAN Setup
.
The WAN Setup screen displays.
6.
Select a NAT Filtering radio button:
•
Secured
. Provides a secured firewall to protect the computers on the LAN from
attacks from the Internet but might prevent some Internet games, point-to-point
applications, or multimedia applications from functioning.
•
Open
. Provides a less secured firewall but allows almost all Internet applications to
function. By default, the
Open
radio button is selected.
7.
Click the
Apply
button.
Your settings are saved.
Manage the SIP Application-Level Gateway
The application-level gateway (ALG) for the Session Initiation Protocol (SIP) is enabled by
default for enhanced address and port translation. However, some types of VoIP and video
traffic might not work well when the SIP ALG is enabled. For this reason, the modem router
provides the option to disable the SIP ALG.
To change the default SIP ALG setting:
1.
Launch an Internet browser from a computer or WiFi device that is connected to the
network.
2.
Type
.
Page 138 / 202
Manage the WAN and LAN
Network Settings
138
N600 and AC750 WiFi DSL Modem Routers
A login screen displays.
3.
Enter the user name and password for the modem router.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Setup > WAN Setup
.
The WAN Setup screen displays.
6.
To disable the SIP ALG, select the
Disable SIP ALG
check box.
The SIP ALG is enabled by default.
7.
Click the
Apply
button.
Your settings are saved.
Manage the Modem Router’s LAN IP Address Settings
The modem router is preconfigured to use private IP addresses on the LAN side and to act as
a DHCP server. The modem router’s default LAN IP configuration is as follows:
•
LAN IP address
. 192.168.1.1 (This is the same as www.routerlogin.net and
www.routerlogin.com.)
•
Subnet mask
. 255.255.255.0
These addresses are part of the designated private address range for use in private networks
and are suitable for most applications. The IP address and subnet mask identify which
addresses are local to a specific device and which must be reached through a gateway or
modem router. You might want to change these settings if you need a specific IP subnet that
one or more devices on the network use, or if competing subnets use the same IP scheme.
To change the LAN IP address settings:
1.
Launch an Internet browser from a computer or WiFi device that is connected to the
network.
2.
Type
.
A login screen displays.
3.
Enter the user name and password for the modem router.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Setup > LAN Setup
.
Page 139 / 202
Manage the WAN and LAN
Network Settings
139
N600 and AC750 WiFi DSL Modem Routers
6.
In the
IP Address
field, enter the LAN IP address for the modem router.
7.
In the
IP Subnet Mask
, enter the LAN subnet mask for the modem router.
8.
Click the
Apply
button.
Your settings are saved.
If you changed the LAN IP address of the modem router, you are disconnected when the
changes take effect.
To reconnect, close your browser, relaunch it, and log in to the modem router at its new
LAN IP address.
Manage Reserved LAN IP Addresses
When you specify a reserved IP address for a computer on the LAN, that computer always
receives the same IP address each time it accesses the modem router’s DHCP server.
Reserve a LAN IP address
You can assign a reserved IP address to a computer or server that requires permanent IP
settings.
To reserve an IP address:
1.
Launch an Internet browser from a computer or WiFi device that is connected to the
network.
2.
Type
.
A login screen displays.
Page 140 / 202
Manage the WAN and LAN
Network Settings
140
N600 and AC750 WiFi DSL Modem Routers
3.
Enter the user name and password for the modem router.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Setup > LAN Setup
.
The LAN Setup screen displays.
6.
In the Address Reservation section, click the
Add
button.
7.
Either select a detected device from the Address Reservation Table table by selecting
the corresponding radio button or specify the reserved IP address information:
•
In the
IP Address
field, enter the IP address to assign to the computer or device.
Choose an IP address from the modem router’s LAN subnet, such as 192.168.1.x.
•
In the
MAC Address
field, enter the MAC address of the computer or device.
•
In the
Device Name
field, enter the name of the computer or device.
8.
Click the
Add
button
.
The reserved address is entered into the table on the LAN Setup screen.
The reserved address is not assigned until the next time the computer or device contacts the
modem router’s DHCP server. Reboot the computer or device, or access its IP configuration
and force a DHCP release and renew.
Change a Reserved IP Address
You can change a reserved IP address entry.
To change a reserved IP address entry:
1.
Launch an Internet browser from a computer or WiFi device that is connected to the
network.
2.
Type
.
A login screen displays.
3.
Enter the user name and password for the modem router.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Setup > LAN Setup
.
The LAN Setup screen displays.
6.
In the Address Reservation section, select the radio button next to the reserved address.

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