How does one connect to a shell (cmd.exe) bound to a port on a remote machine?

["Mark G. Spencer" <mspencer () evidentdata com>]

I've been looking at some perl scripts that purport to create cmd.exe shells bound to a tcp port on a remote machine.  
I'm curious, how would someone connect to these shells?  The code looks very compact, I wouldn't imagine you could just 
http to the port bound with cmd.exe?  Perhaps telnet?  Is this how Code Red and Nimda were operating?

Thanks for the information!

Mark

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