TOPS-20 Telnet and Port Forwading issue

Eric Smith spacewar at gmail.com
Tue Dec 13 13:08:32 CST 2016


It's the SGA (suppress go-ahead) negotiation that's necessary to avoid line
mode.

Many telnet clients don't try to negotiate any telnet options if you
connect to a non-standard port, because they assume that you're talking to
something other than a telnet server, and that you therefore want an 8-bit
transparent connection with local line editing. Examples would be to telnet
to an SMTP server, FTP server, etc. for testing purposes.

A telnet client that has that behavior but no provision for overriding it
is defective, and should either be fixed, if possible, or deleted with
prejudice.


More information about the cctalk mailing list