mickaelbergem / dnsstresss

Simple Go program to stress test DNS servers

DNSStresss, 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 install github.com/MickaelBergem/dnsstresss@latest

Then:

$ dnsstresss -h
dnsstresss - dns stress tool

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

Usage: dnsstresss [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

For IPv6 resolvers, use brackets and quotes:

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

Example:

dnsstresss's Issues

Go get is deprecated

Please update Readme.md, "go get" is deprecated.

Can't use IPv6 resolvers

It doesn't seem possible, with the current cli, to use ipv6 addresses, because of the ip:port format of the -r argument.

This form obviously doesn't work :

    ./dnsstresss -r 2001:4860:4860::8888:53 google.com.

This one (often used with ipv6 literals that need port information) doesn't seem to work either :

    ./dnsstresss -r [2001:4860:4860::8888]:53 google.com.

There should be a `-flood` option for not waiting for a response

Instead of waiting for a response, it could be useful to send as many queries as possible without waiting for a response.

Does not work at all

%  ./dnsstresss  www.bortzmeyer.org
dnsstresss - dns stress tool
Queried domains: [www.bortzmeyer.org].
Started 50 threads.
Started timer channel.
Requests sent: 0r/s (0 total)   Replies received: 0r/s
Requests sent: 0r/s (0 total)   Replies received: 0r/s
Requests sent: 0r/s (0 total)   Replies received: 0r/s
Requests sent: 0r/s (0 total)   Replies received: 0r/s
...

And tcpdump sees zero traffic on interface lo to 127.0.0.1.

% go version
go version go1.3.3 linux/386

% uname -a
Linux ludwigVII 3.16.0-4-686-pae #1 SMP Debian 3.16.7-ckt11-1+deb8u5 (2015-10-09) i686 GNU/Linux
` ` ` 

An explicit -r="127.0.0.1:53" changes nothing.