Re: openbsd telnet to serial
By: phigan to bbsing on Wed Nov 26 2025 05:43:54
> Re: openbsd telnet to serial
> By: bbsing to All on Mon Nov 24 2025 09:36 pm
>
> > Does anyone know why the password is shown, and how to get it to not echo
wh the user types it in?
>
> Have you tried using a raw connection into it instead of telnet? Try this for
science.. make sure you have netcat (nc)
> installed.
> Create a file called raw.sh with this in it:
>
> settings=$(stty -g)
> stty raw -echo
> nc $1 $2
> stty $settings
>
> then 'chmod +x raw.sh' and then './raw.sh ipaddress port'. Just one thing to
note, when you finally disconnect, you need to hit
> a
> key to return to your prompt.
>
> The reason for this is telnet does some negotiation on connect, and you're no
t running telnetd. Your client says "Hey, let's
> agree
> on some stuff!" but your server isn't listening for that.
>
OK this was interesting. The password did not appear when I typed it. The userna
me did, but not the password. I don't udnerstand why when I hook the serial por
t of my modem up directly to getty and its identified as a dialin device it does
this.
netcat worked how I wanted it to.
Why does the behavior change using telnet vs netcat's raw connection.
NOTE: I switch from openbsd to freebsd because there is no inetd server, or teln
etd server with openbsd.
FreeBSD/amd64 (dad) (ttyu0)
login: CONNECT
Password:
Login incorrect
login: bbsing
Password:
Last login: Wed Nov 26 17:32:27 on ttyu0
FreeBSD 14.3-RELEASE-p5 GENERIC
:) :)
---
■ Synchronet ■ Lunar Outpost BBS
|
