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DNS Lookup

Diagnostics > DNS Lookup performs simple forward and reverse DNS queries to obtain information about an IP address or hostname, and also to test the DNS servers used by the firewall.

To perform a DNS Lookup:

  • Navigate to Diagnostics > DNS Lookup

  • Enter a Hostname or IP address to query

  • Click fa-search Lookup

The page displays the results of the DNS query along with supporting information and options.

Results

The Results panel contains addresses returned by the DNS query along with the record type.

Underneath the results is a table containing the resolution Timings per server. This shows how fast each of the configured DNS servers responded to the specified query, or if they never responded.

The More Information panel contains links to ping and traceroute functions on the firewall for this host.

Aliases

When performing a DNS lookup, the GUI can also create a firewall alias from the results of the query. The name of the alias is the text entered for the DNS query but with . characters replaced by _. For example, a DNS lookup for example.com results in an alias named example_com.

Click fa-plus Add alias to create an alias containing the results of the query.

If an alias already exists with that name, the button is labeled Update Alias instead. That version of the button will replace the contents of the existing alias with the current results of the DNS lookup.