• SonicOS and SonicOSX 7
• Configuring DNS Settings
  • Configuring DNS for IPv4
    • Specifying which DNS Servers are Used
    • Enabling Proxy of Split DNS Servers
    • DNS Rebinding Attack Prevention
    • DNS Rebinding and Cache Lookup
    • Enabling DNS Host Name Lookup over TCP for FQDN
    • DNS Cache Lookup
  • Configuring DNS for IPv6
  • Configuring Domain-Specific DNS Servers for Split DNS
    • About Split DNS
      • About Per-Partition DNS Servers and Split DNS
    • Adding a Split DNS Server
    • Editing Split DNS Entries
    • Deleting Split DNS Entries
• Configuring Dynamic DNS
  • About Dynamic DNS
    • Supported DDNS Providers
  • Dynamic DNS Profiles
    • Configuring Dynamic DNS Profiles
    • Editing Dynamic DNS Profiles
    • Deleting Dynamic DNS Profiles
• Configuring DNS Proxy Settings
  • About DNS Proxy
    • Supported Interfaces
    • DNS Server Liveness Detection and Failover
    • DNS Cache
    • High Availability Stateful Synchronization of DNS Cache
    • DHCP Server
  • Enabling Log Settings
  • Monitoring Packets
  • Configuring DNS Proxy Settings
    • Enabling DNS Proxy
    • Configuring DNS Proxy Settings
    • Deleting Static DNS Cache Entries
    • Viewing DNS Proxy Cache Objects
    • Flushing Dynamic DNS Cache Entries
• Configuring DNS Security
  • About DNS Sinkholes
  • Configuring DNS Security Settings
  • Deleting Entries in the Lists
  • Configuring DNS Tunnel Detection
    • Configuring DNS Tunneling Detection
    • Viewing Detected Suspicious Clients
    • Creating DNS Tunnel Detection White Lists
    • Deleting DNS Tunnel Detection White List Entries
• SonicWall Support
  • About This Document

Adding a Split DNS Server

To add domain-specific DNS servers and associate them to a given domain name

The maximum number of entries for Split DNS is 32. If the list is full, new entries cannot be added.

1. Navigate to Network | DNS > Settings.
2. Choose the IP version from View IP Version.
3. To enable proxying of split DNS servers, select Enable proxying of split DNS servers. This option is selected by default.

4. Under the Split DNS table, click +Add. The Add Split DNS dialog displays.

   If you selected DNS Proxy, a page for it, DNS Proxy, also displays on the Add Split DNS dialog.

5. Choose the IP version:
   • IPv4
   • IPv6
   • Both
6. In the Domain Name field, enter the domain name. The name can contain a wildcard (*; for example, *.SonicWall.com).
7. To configure one or more IPv4/IPv6 Split DNS Servers for this domain, enter the IP addresses in the appropriate fields:
   • Primary Server (v4/v6)
   • Secondary Server (v4/v6) (optional)
   • Tertiary Server (v4/v6) (optional)
8. From the Local interface drop-down menu, select an interface.
9. If you have enabled DNS Proxy:

   1. To specify a Time to Live, select Manually set TTL value in DNS reply. This option is not selected by default. If this option is not selected, the TTL value is the same as that from the DNS response; if it is set, the TTL value is the same as the setting.

      This option applies only when Split DNS is used by DNS Proxy.

   2. Enter the maximum time for the cache entry to exist. The minimum is one second, the maximum is 9999999999999999 seconds.
10. Click Save.