Telnet

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

On a old Mac use NSCA telnet.

https://tools.ietf.org/html/rfc854 (1983)

http://en.wikipedia.org/wiki/NCSA_Telnet

http://www.macorchard.com/classic/terminal/NCSATelnet.php

http://mewbies.com/acute_terminal_fun_telnet_public_servers_watch_star_wars_play_games_etc.htm#telnet_misc

http://www.martinjosefsson.com/telnet/cli/network/2012/09/30/fun_with_telnet.html

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

Many people use sites like http://www.whatismyip.com or http://www.ipchicken.com to identify the public IP address of an unfamiliar network.

Telnet to ip.blindhog.net or 184.105.238.114 if you do not have a web browser (router, switch, linux).
Note: the original domain name was v4address.com but it has not worked for a while.

[josh@webserver ~]$ telnet ip.blindhog.net
Trying 184.105.238.114…
Connected to ip.blindhog.net.
Escape character is ‘^]’.
This is the telnet autoresponder at v6address.com.
You have connected over IPv4.
Your IP address is 12.34.56.78
Connection closed by foreign host.

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