Rails - Oct 2014 - Can't connect to localhost:3000

The hard drive on my Macbook recently failed.  A local shop replaced it and 
restored data from the failing drive.  Thereafter, I couldn't start the the 
rails server on rails apps that previously had worked as expected.  I 
subsequently rebuilt rails 2.1.3 under rvm.  Now, rails -s starts WEBrick 
successfully, but I can only connect on 0.0.0.0:3000 rather than on 
localhost:3000 as I from rails apps that allowed it just a couple of days 
ago.  I added the tzinfo-data gem as suggested on some related posts, but 
still no joy.  I'm running rails 4.1.6 on ruby 2.1.3p242 under 0SX 10.9.5. 
 Can anyone suggest how I might proceed from here?

Regards,

Mike

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