Comment by dekhn

I think all the TinyMUDs I used (CMU and whatever the one in OK was), listened on nonstandard ports.

I had to use a VMS system which had different telnet behavior (staircasing due to CR/LF mismatch) and originally used a locally developed client (TINT mentioned here https://www.linnaean.org/~lpb/muddex/clients.html) then learned C to write a subsequent client (DINK) which supported macros and "portals"- an early way to transit across different MUDs. A few years ago I learned that DINK was forked and improved- my early C code was awfully bad. It's still bad, but it was awfully bad then.

The one funny bit is that I copied TINT's exit command (Control-Y) instead of using /quit which led to several years of email complaints form folks who couldn't exit the mud (in those days, you usually just had one terminal connection, and if you couldn't exit a program, you had to forcibly disconnect the modem).