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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 http://www.routerlogin.net.
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 http://www.routerlogin.net.
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