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Question

How to get a list of IPs for a remote computer in Ruby

Answer 1

A:

require 'resolv-replace'
Resolv::DNS.new.each_address("oreilly.com") { |addr| puts addr }

produces:

208.201.239.101
208.201.239.100

http://codeidol.com/other/rubyckbk/Internet-Services/Performing-DNS-Queries/

Jay 2010-05-11 03:01:46

I cant get your example to work but it looks the same as Socket::getaddrinfo('www.google.com', 'www', nil, Socket::SOCK_STREAM).each do |a, p, n, ip| puts addr end Which work for Google but not locally. I believe this is because of the DNS which has multiple IPs registered with the name. The servers I'm working with only have one IP registered with their name in DNS

JustSmith 2010-05-11 15:02:37

The only way to get IP addresses from a name is by looking up the IPs somewhere. The IPs of the machines your trying to access must be published somewhere for you to look them up. There is no way to magically discover them. If this information is not available, there is no way your program can get it.

Jay 2010-05-11 15:40:38

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How to get a list of IPs for a remote computer in Ruby

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