dnstools
DNS Diagnostics and Performance Measurement Tools
prerequisites
This script requires python3 as well as latest dnspython
dnsping
dnsping pings a DNS resolver by sending an arbitrary DNS query for given number of times:
% ./dnsping.py -c 3 -s 8.8.8.8 -t MX wikipedia.org
DNSPING 8.8.8.8: hostname=wikipedia.org rdatatype=MX
101 bytes from 8.8.8.8: seq=0 time=161.607 ms
101 bytes from 8.8.8.8: seq=1 time=156.355 ms
101 bytes from 8.8.8.8: seq=2 time=145.201 ms
--- 8.8.8.8 dnsping statistics ---
3 requests transmitted, 3 responses received, 0% lost
min=145.201 ms, avg=154.388 ms, max=161.607 ms, stddev=8.378 ms
This script calculates minimum, maximum and average response time as well as jitter
dnsperf
dnsperf is a bulk ping utility that sends an arbitrary DNS query to a give list of DNS servers. This script is meant for comparing response time of multiple DNS servers at once:
% ./dnsperf.py wikipedia.org
server avg(ms) min(ms) max(ms) stddev(ms) lost(%)
-------------------------------------------------------------------------
4.2.2.1 152.938 142.640 166.988 8.546 %10
4.2.2.2 147.496 136.643 160.676 8.903 %30
64.6.64.6 146.446 112.044 162.620 17.441 %0
8.8.4.4 307.992 303.591 315.377 3.418 %0
8.8.8.8 150.635 110.882 172.863 20.908 %0
todo
- input sanitization