MacIP protocol


Not much used anymore. But nice to use on an old Mac!

On a old Mac use NSCA telnet.  (1983)


What could you do with it? Well..   this:


Many people use sites like or to identify the public IP address of an unfamiliar network.

Telnet to or if you do not have a web browser (router, switch, linux).
Note: the original domain name was but it has not worked for a while.

[josh@webserver ~]$ telnet
Connected to
Escape character is ‘^]’.
This is the telnet autoresponder at
You have connected over IPv4.
Your IP address is
Connection closed by foreign host.

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