dnsstress

DNSStress, the DNS stress test tool

Simple Go program to stress test a DNS server.

It displays the number of queries made, along with the answer per second rate reached.

Usage

First:

go get github.com/DataDog/dnsstress

(Credit to original writer Mickael Bergem)

Then:

$ dnsstress -h
dnsstress - dns stress tool

Send DNS requests as fast as possible to a given server and display the rate.

Usage: dnsstress [option ...] targetdomain [targetdomain [...] ]
-concurrency int
            Internal buffer (default 50)
-d int      Update interval of the stats (in ms) (default 1000)
-f          Don't wait for an answer before sending another
-i          Do an iterative query instead of recursive (to stress authoritative nameservers)
-r string   Resolver to test against (default "127.0.0.1:53")
-random     Use random Request Identifiers for each query
-v          Verbose logging
-m          Number of messages to send before stopping (defaults to 1000000)
-inf        Ignore max number of messages and send infinitely

For IPv6 resolvers, use brackets and quotes:

dnsstress -r "[2001:4860:4860::8888]:53" -v google.com.