Answer | Domain Name Server (DNS) is a database that contains domain host names (e.g http://www.arris.com) which are linked to a specific IP address.  When accessing a website the computer uses DNS to retrieve the website's specific IP address.  Without DNS the computer could only access the specific IP address directly if known.  This document describes how to setup custom DNS addresses in the SBG7400AC2.Â
CAUTION: By default, the SBG7400AC2 obtains DNS addresses automatically from the service provider.  Internet connection may be lost if the DNS addresses inputted in the SBG7400AC2 are not legitimate.
The following are examples of scenarios when DNS settings are customized:
- Users may prefer to use public DNS addresses to improve web browsing experience.
- Advanced users setup local DNS server in a home network to hide DNS requests.
DNS SetupÂ
- Launch a web browser, such as Internet Explorer, Firefox, or Safari.  Enter http://192.168.0.1 into the address box, and press the Enter key.  The Login page will appear.
NOTE: A security or private risk alert may appear on the web browser advising users to proceed with caution when accessing the Web Manager. There is no risk in proceeding to the Web Manager. For instructions to by-pass the alert screen, refer to article #Â 18181 - Alert Message for Web Manager Access.
 - On the Login page, enter admin in the User Name field.
 - Enter password or a customized password in the Password field.
NOTE: When using the default password to login, it may be required to set a unique password to proceed to the Web Manager. For assistance with Web Manager Access, refer to article # 18345 – SBG7400AC2: Web Manager Access.
 - Click the Apply button.  The System Basic Setup page will appear.
 - On the System Basic Setup page, click the LAN Setup link on the top menu.  The LAN Settings page will appear.
 - On the LAN Settings page, check the Enable DNS Override box.
 - Enter the alternative primary DNS address into the Primary DNS Server IP field.
 - Enter the alternative secondary DNS address into the Secondary DNS Server IP field.Â
 - Click the Apply button and the gateway will reboot.  After the reboot the Login page will appear. Â
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