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3. Enter the modem router user name and password.
The user name is admin.The default password is password. The user name and password are case-sensitive.
The BASIC Home page displays.
4. Select ADVANCED > Setup > WAN Setup.
The WAN Setup page displays.
5. 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.
By default, the Secured radio button is selected.
• Open. Provides a much less secured firewall but allows almost all Internet applications to function.
6. 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 a web browser from a computer or WiFi device that is connected to the network.
2. Enter http://www.routerlogin.net.
A login window opens.
3. Enter the modem router user name and password.
The user name is admin.The default password is password. The user name and password are case-sensitive.
The BASIC Home page displays.
4. Select ADVANCED > Setup > WAN Setup.
The WAN Setup page displays.
5. To disable the SIP ALG, select the Disable SIP ALG check box.
The SIP ALG is enabled by default.
6. Click the Apply button.
Your settings are saved.
Manage the WAN and LAN Network Settings
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Nighthawk X4S AC2600 WiFi VDSL/ADSL Modem Router Model D7800