From: Bill McLean <bill@...>
Date: 2010-04-27T00:11:49+09:00
Subject: Ruby networking: Errno::ECONNREFUSED: Connection refused - connect(2) on Ubuntu 9.1

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All,

 

When using the Ruby networking library in two sample programs below I get
the connect refused exception.  To validate the code, I am running both the
client and server code in separate terminal windows.  The ip address given
is the address that has been assigned to the eth0 device.

 

The client fails to connect to the server. However if I change the ip
address to localhost or 127.0.0.1 then the connection is made.

 

It may not have anything to do with ruby, but with the configuration of my
linux machine.

 

Using ping I can explicitly ping the ip  address without fail.

 

Any help getting this working would be appreciated.

 

Server.rb

 

require 'socket'

 

dts = TCPServer.new('localhost', 9900)

 

loop do

  Thread.start(dts.accept) do |client|

 

    print(client, "is accepted\n")

    client.close

  end

end

 

Client.rb

 

require 'socket'

 

 

targetIp = "192.168.0.3"

targetPort = 9900             

begin

server = TCPSocket.open(targetIp, targetPort) 

                puts "Connected to Server" + targetIp + ":" + targetPort 

                                server.close

rescue => ex

                                puts "Connection to Server Failed:
#{ex.class}: #{ex.message}"

end

 

 

Regards

 

Bill McLean
Technical Director




 


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