https://gitlab.synchro.net/main/sbbs/-/issues/432#note_5363
'$ nc nethack.alt.org 23' doesn't work either - and that's a big clue.
`sbbs_t::telnet_gate()` needs to grow a Telnet "proxy" capability.
This should also address Nelgin's concerns about connecting to `freechess.org` using Synchronet telnet gateway support. The Telnet gateway works pretty well when the client is a Telnet client (i.e. instead of SSH, RLogin, or raw TCP client) and the Telnet server doesn't really require a positive acknowledgement to all the Telnet commands it sends (Telnet client won't acknowledge a mode it's already in).
--- SBBSecho 3.20-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)