Dnstop – monitoring of requests to the DNS server

The utility is installed in Ubuntu/Debian by the command:

sudo apt-get install dnstop

Start-up example:

dnstop -n google.com eth0

I’ll describe the list of possible startup keys:
-4 (number of IPv4 packets)
-6 (number of IPv6 packets)
-Q (number of requests)
-R (number of answers)
-a (anonymous IP addresses)
-i ADDRESS (ignoring the specified IP address)
-n NAME (number of requests for the specified address only)
-l NUMBER (monitoring up to the specified number of requests)
-f (filter name)

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