From: Edward QU <ajax.htm@...>
Date: 2011-10-05T00:24:45+09:00
Subject: Re: net ping is in error in Windows 7 OS

Thank you Pat for your kindly help.
I did , but it still work wrong.
I test it in irb as the following:

>> require "net/ping"
=> true
>> puts 'OK' if Net::Ping::External.new '192.168.1.1'
OK
=> nil
>> puts 'OK' if Net::Ping::External.new '192.168.1.5'
OK
=> nil
>> puts 'OK' if Net::Ping::External.new '192.168.1.555'
OK
=> nil

what a amazing, the 199.168.1.555 can be ping and is ok ?!
I use Ruby 1.9.2-260, win7 64. net-ping 1.5.1, kabasky fire wall in 
local PC.

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