News Group Posts

does baud rate matter for ssh or

telnet?

From: Bela Lubkin <belal@sco.com>
Subject: Re: telnet vs Openssh
Date: Wed, 3 Sep 2003 20:04:24 GMT
References: <2Tp5b.22$jy.8@bignews2.bellsouth.net> 

willjay wrote:

> Will someone please, login into their Openserver 5.0.? with telnet and do a
> stty -a and check the baud rate and then do the same with Openssh and do
> another stty -a and report the differences in baud rate.
> 
> This may be why I am seeing a slow down in screen drawing with Openssh.

If you're seeing a slowdown, it must be due to client implementation.
You didn't say what client you're using.  If the ssh client defaults to
compression _on_, try telling it to turn it off -- it may be slow at
uncompressing (though in most cases compression should actually make
things _faster_).

"baud rate" doesn't really mean anything on a pseudo-tty.  Feel free to
run `stty 38400` (or `stty 921600`, for that matter) on your ssh
session.  It won't make any difference.

One exception: the _application_ you're running may ask the OS what baud
rate is being used, and then act differently.  Depending on how old the
app is, it may not understand OSR5 baud rates above 9600; or it may
understand 19200 and 38400, but not higher rates.  In those cases it may
act oddly.  For instance, the encoding for 57600 baud may "look" like 50
baud to an old app.  Then it might do long delays, thinking it had to
wait for your slow terminal to catch up.

>Bela<

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