NCSA Telnet Digest  Tuesday, February 7, 1989   Volume 2 : Issue 17
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Subjects:
	Foreign Keymaps
	Ultrix uses trailers by default:  warning

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From: timk (Tim Krauskopf)
Subject: Note about foreign keymaps

A hint for users that want something other than the U.S. Keymap for
use in NCSA Telnet.

The KCHR resource in NCSA Telnet is there for one reason, to map the
option key to control as MacTerminal does.  If you can live without
the option key mapped to control, by using the command key, or if you
have an ADB keyboard, then turn it off.

Turn the mapping off in the preferences dialog (option mapped to control)
or remove the KCHR resource.  You should find that the U.S Keymap is
not installed.  Remember that only ASCII keys are supported by the telnet
protocol.

Thanks to Gaige for pointing this out, please mail back if this doesn't
work.


Tim Krauskopf                timk@ncsa.uiuc.edu (ARPA)

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From: timk (Tim Krauskopf)
Subject:  Ultrix uses trailers by default: warning

I have recently received some queries about trouble with Ultrix
configured VAXen and VAXstations.  They seem to have started when
Ultrix was upgraded to 2.0 or 2.2, sometime about then.

After the last query, we discovered that Ultrix is shipped with the
setting for trailers default ON.  NCSA Telnet can't deal with trailers
and they have questionable benefits for the system, so let's all turn
them off.

Symptoms:
	'cat'ing large files will scroll for about 2 packets (512 to 1024
	bytes) and then telnet freezes up.  You have to close the connection and
	re-open to get it working again.

Solution for Ultrix users:
	You must be super-user to do this:
	in the file /etc/rc.boot, on the line(s) which apply to your Ethernet
	interfaces, change the ifconfig line:

	from:    /etc/ifconfig xxxx name
	to:      /etc/ifconfig xxxx name -trailers

See 'man ifconfig' for more info.

Trailers are only used on large packets > 512 bytes, so you don't see any
problems when you log in, only when you cause large amounts of data to 
be transferred.  Change all machines at once, they must match in their
settings for trailers. 

Tim Krauskopf
NCSA