DNS

A simple command-line Domain Name System (DNS) tool in Ruby (v2.6.5p114) using raw UDP packets

Usage

C:\Users\jdorr\Desktop\Dev\DNS\src>ruby -v
ruby 2.6.5p114 (2019-10-01 revision 67812) [x64-mingw32]

C:\Users\jdorr\Desktop\Dev\DNS\src>ruby dns.rb
ruby DNS.rb domain-host lookup-host1..lookup-hostN
e.g. ruby DNS.rb 192.168.0.1 news.bbc.co.uk
e.g. ruby DNS.rb 192.168.0.1 www.facebook.com www.twitter.com www.instagram.com

C:\Users\jdorr\Desktop\Dev\DNS\src>ruby dns.rb 192.168.0.1 www.facebook.com www.twitter.com
Query www.facebook.com sent to 192.168.0.1
2 answers received
Response:
        Type:   5       (CNAME (Canonical NAME for an alias))
        TTL:    60
        Name:   star-mini.c10r.facebook.com
Response:
        Type:   1       (A (Host Address))
        TTL:    60
        Name:   157.240.1.35

Query www.twitter.com sent to 192.168.0.1
3 answers received
Response:
        Type:   5       (CNAME (Canonical NAME for an alias))
        TTL:    6
        Name:   twitter.com
Response:
        Type:   1       (A (Host Address))
        TTL:    6
        Name:   104.244.42.1
Response:
        Type:   1       (A (Host Address))
        TTL:    6
        Name:   104.244.42.65

Complete.