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Configuring DNS Nameservers for DHCP

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Many organizations use the MX appliance as a DHCP server, which will also configure hosts to use a specific DNS server. The MX offers four options for which DNS servers will be used:

  • Proxy to upstream DNS
    Clients will send DNS requests to the LAN interface of the MX, which will then proxy those requests to the DNS server(s) configured for its primary Internet uplink.
  • Use Google Public DNS
    Google maintains publicly available DNS servers. Clients will use and to resolve DNS.
  • Use OpenDNS
    OpenDNS is another organization which maintains publicly available DNS servers. Clients will use and to resolve DNS. OpenDNS also provides additional services for their DNS, so pointing clients to their DNS servers allows those features to be used.
  • Specify nameservers...
    Specify the IP address of your DNS server to provide clients with custom DNS servers.

The following instructions outline how to configure custom nameservers for your MX's DHCP scope:

  1. On the Dashboard, navigate to Security & SD-WAN > Configure > DHCP > Main subnet/VLAN ID >  DNS nameservers and choose Specify nameservers... from the drop-down.
  2. In the Custom nameservers field, enter the IPv4 address or hostname of your DNS server. You may specify additional servers with a new line, comma, or space.
  3. Click Save Changes.

The Custom nameservers field has a maximum character limit of 255.

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