Re: openbsd telnet to serial
By: Digital Man to bbsing on Tue Dec 02 2025 21:32:37
> > connection via client must be full duplex, without a way to change that.
>
> The telnet protocol (and many telnet clients) includes a method to tell the
> server whether or not to "echo" back what it receives from the client.
>
> https://datatracker.ietf.org/doc/html/rfc857
>
> As you can see from that specification, the default is not to echo:
> 3. Default
>
> WON'T ECHO
>
> DON'T ECHO
>
> No echoing is done over the TELNET connection.
>
> Maybe that's helpful to you.
Thanks Digital man,
I check the man page and there is a way to control the echo, its called "old li
ne by line" mode, and supposedly a "^E" will turn off echo.
When I tried to enable it:
^]
mode line
then attempting to login, at the login: prompt I enter my login name, then the p
assword prompt appears, and attempting to press "^E" the characters apear as par
t of the password, doesn't turn off echo. So I'm not really finding telnet clien
t connecting to a serial port or rs232, modem the best method. Raw mode via nc w
orks perfectly.
My system is using a wifimodem, in a normal modem world dialing up the other mo
dem would probably work perfectly. The wifimodem does its magic for a telnet con
nection from a telnet client, thinks its an actual incoming call (RING).
Its all good fun to test and learn how the system works. I would hook my USR 56k
to it, but the infrastructure for that testing is a lot of work right now.
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■ Synchronet ■ Lunar Outpost BBS
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