SonicOS/X 7 Network DNS

Technical Documentation>  Configuring DNS Settings>  Configuring Domain-Specific DNS Servers for Split DNS>  About Split DNS
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About Split DNS

Split DNS is an enhancement that allows you to configure a set of servers and associate them to a given domain name (which can be a wildcard). When SonicOS/X DNS Proxy receives a query that matches the domain name, the name is transmitted to the designated DNS server.

As an example, for a topology that has two firewalls with network connectivity:

  • One firewall is connected to the Internet.
  • Another is a VPN tunnel connected to the corporation network.
  • Default DNS queries go to the public ISP DNS Server.
  • All queries to *.SonicWall.com go to the DNS server located behind the VPN tunnel.

For viewing and configuring split DNS entries, see Configuring Domain-Specific DNS Servers for Split DNS.

By adding a split DNS entry, all queries to SonicWall.com are sent to the specific server (see Configuring Domain-Specific DNS Servers for Split DNS).

Multiple DNS servers could be configured to handle queries to SonicWall.com as well.