[SOLVED] Speed test for a list of DNS addresses

Hoxygen232 · 08-22-2015, 01:51 AM

Hi,

I'm writing a unix script, I need a way to test the response time of a group of IP addresses (they are DNS addresses).
I was thinking I could you

Code:

dig google.com @[DNS_1]

but I should use it in a loop and I should get the

Code:

Query time:

in the result string and I don't know how to do that.

It would be nice if the script was able to get the DNS list from a simple file where each row is a DNS address.

How can I do that? Do you have any other idea?

Thanks

teckk · 08-22-2015, 09:58 AM

Code:

#! /usr/bin/env bash

#Add/subtract DNS here.
list=(
208.67.222.222 	#OpenDNS
208.67.220.220 	#OpenDNS
8.8.8.8 		#Google
8.8.4.4 		#Google
209.244.0.3 	#Level3
209.244.0.4		#Level3
68.94.156.1 	#ATT
68.94.157.1		#ATT
4.2.2.1 		#Verizon
4.2.2.2 		#Verizon
4.2.2.3			#Verizon
4.2.2.4 		#Verizon
4.2.2.5 		#Verizon
4.2.2.6			#Verizon
75.75.76.76		#Comcast
84.200.69.80	#DNSwatch
84.200.70.40	#DNSwatch
209.88.198.133	#Greenteam
195.46.39.39 	#SafeDNS
195.46.39.40	#SafeDNS
50.116.23.211	#OpenNIC
37.235.1.174 	#FreeDNS
37.235.1.177	#FreeDNS
8.26.56.26		#Comodo
8.20.247.20		#Comodo
74.82.42.42		#Hurricane
89.233.43.71	#Censur
91.239.100.100	#Censur
)

for i in ${list[@]}; do
	echo $i
	dig @"$i" bing.com | grep Query
	sleep 1
	echo '' 
done > dnstest.txt

Hoxygen232 · 08-22-2015, 10:34 AM

thanks