• SonicOS 7.0 Diagnostics for Classic Mode
• Introduction to Diagnostics for Classic Mode
• Terminal
• Tech Support Report
• Check Network Settings
• DNS Name Lookup
• Network Path
• Ping
• Trace Route
• Real-Time Blacklist
• Reverse Name Lookup
• Connection TopX
• Geo and Botnet
• MX and Banner
• GRID Check
• URL Rating Request
• PMTU Discovery
• Switch Diagnostics
• SonicWall Support
  • About This Document

DNS Name Lookup

The DNS lookup tool returns the IPv4 and IPv6 IP address of a URL. If you enter an IPv4 and/or IPv6 IP address, the tool returns the domain name for that address. If you enter a domain name, the tool returns the DNS server used and the resolved address.

Navigate to Device > Diagnostics > DNS Name Lookup, with the DNS Server radio buttons, you can select either a System or Customized DNS server. The options change, depending on which you choose.

The IPv4/IPv6 DNS Server fields display the IP addresses of the DNS Servers configured on the firewall. If there is no IP address (0.0.0.0 for IPv4 or :: for IPv6) in the fields, you must configure them on the Network > DNS page.

Under Lookup name or IP, enter the URL and select, IPv4, IPv6, or All and click GO.

Resolving a System DNS Server

To resolve a system DNS Server

1. Select System for the DNS Server.



2. In the Lookup name or IP field, enter either the domain name or the IP address.
3. Select the type of IP address from the drop‐down menu:
   • IPv4 (default)
   • IPv6
   • All
4. Click GO. The firewall returns the matching pair of addresses and domain names.

When specifying a domain name, do not add http or https to the name.

Resolving a Customized DNS Server

To resolve a Customized DNS Server

1. Select Customized under DNS Server.

   

2. If the DNS Server IP address is not populated, enter it in the IPv4 or IPv6 field.

3. In the Lookup name or IP field, enter either the domain name or the IP address.

4. Select the type of IP address from the drop‐down menu:

   • IPv4 (default)

   • IPv6

   • All

5. Click GO.