Using tcp port via socket on windows 2000 server


Here’s a very simple ruby app that will listen to tcp port 9990. It
works on my client windows xp machine, but when i put it on windows
2000 server, it doesn’t work. no port filtering is being done, so i’m
assuming that all ports are available. any suggestions? how do i
find out what ports are available.

require ‘socket’
sessions = {}‘localhost’,9990)
puts ‘Server running…’
while(session = serv.accept)
command = session.gets
puts command


On Sun, Mar 18, 2007 at 10:40:06AM +0900, removed_email_address@domain.invalid wrote:

while(session = serv.accept)
command = session.gets
puts command

I don’t have a Windows 2000 machine, but I think in any case you’ll need
provide more details for anyone to be able to help you. What do you mean
“it doesn’t work”? It could mean:

  • the program raises an exception (if so, post the exact error message)

  • a client gets ‘connection refused’ when it tries to connect to port
    (if so, this means the server isn’t listening on port 9990)

  • the client can connect, but when it sends a string, nothing is
    on the server

  • the server doesn’t get as far as printing “Server running…”

  • probably a bunch of other failure modes that I haven’t thought of.

One easy thing you can try is to use ‘’ instead of ‘localhost’.
Perhaps Windows 2000 doesn’t define the name “localhost” for you.

But without seeing a description of the error, it’s very hard to help
More advice here: