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From: cove@netcom.com (Cove Schneider)
Subject: Problem: Telnet & ETS (Lantronix terminal server)
Message-ID: <coveDFI5qv.DIv@netcom.com>
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
X-Newsreader: TIN [version 1.2 PL1]
Date: Tue, 26 Sep 1995 07:49:43 GMT
Lines: 104
Sender: cove@netcom10.netcom.com
Hello..
I've been having a terriable time with telneing into my FBSD machine
from a Lantronix EST16 -- a terminal server.
Here is the info:
o I can telnet to my machine fine, but I get '^@' after
each CR (CRLF?) -- actually only in the login. So I
disabled the telnet padding and that went away. But..
o When I telnet in I don't get a LF after my CR. So
when I send a CR my cursor just returns to the
beginning of the line with out a LF. I've tried
sending a CRLF, but the latter still happens.
(BTW, *with* telnet padding this still happens.)
o I contacted tech support for the Lantronx ETS:
They telneted in and checked it out and agreed
it wasn't working right <Hrummm>, but said that
as far as they could tell everything was setup
correctly at both ends. Only thing they could
come up with is that there was a bug in telnetd
and/or getty.
o Funny thing though is that telneting out to other
machines (mainly SunOS machines) works great --
with telnet padding and all. When I send a CR
I also get a LF -- that is if I'm at a prompt
and I hit the enter key I get another prompt
opposed to getting the last prompt written
over by the new one.
o So I read the telnted man page. I believe it
has something to do with the telnet emmulator
on the ETS not supporting LINEMODE -- or
something like that. I recompiled telnetd
with the kludge option, restarted inetd
with the -k in /etc/inetd.conf.. No go.. I get
the same thing.
o I have ran telnetd with the -D netdata option
to verify what was being recieved by the daemon.
Everything was correct, as compared to telneting
from my machine to 127.0.0.1 and comparing the data
sent with what the ETS was sending. Only major
diffrence was that after each key press on the ETS
telnetd would display the char sent, while telneting
from the FBSD machine would display the data after
each newline. Which leads me to belive it has some-
thing to do with LINEMODE. But..
o When I telnet into the ETS from the FBSD machine
then telnet back out to the same machine: I do
get the '^@' problem (if telnet padding is on)
but I don't get the newline problem -- the prompt
writing over it's self from a lack of a newline.
BTW, a prompt that writes over it's self is
extreamly irritaing: Do an ls, and the first
line of it will have part of your prompt
in it. It can be very confusing.
Here's my setup:
[hope this diagram make this post a little more intersting.]
+---------+
| 2.0.5R |
| FreeBSD |
+---------+
|
| (ISA)
|
+---------+ (swaped TP) +-----------+
| 3Com TP |---------------| Tranciver |
+---------+ +-----------+
|
| (AUI)
|
+---------------+ +-----------+
| DEC VT220 | | Lantronix |
| in VT100 mode |--------| ETS-16 |
| w/ Xon/Xoff | +-----------+
+---------------+
Note:
The VT220 works perfictly when not connected via the ETS16.
Well, I hope I'm explaining my situation clearly. I've
never seen this before (except on my machine for the
past 4 months!), so I'm not compleatly sure how
to expalin it. At this point I'm going to start pouring
though the telnetd code and see if I can find anything.
In the mean time if _anyone_ has any idea, thoughts,
soloutions(!) to this headache, I would be *very* *very*
appreciative...
Thanks..
--
Cove Schneider cove@netcom.com