Sun Microsystems Sun Workstation 100U System Manager's Manual page 259

TELNETD ( BC )
MAINTENANCE COMMANDS TELNETD
(BC )
NAME
telnetd - DARPA TEL NET protocol server
SYNOPSIS
/ulr /etc/ln.telnetd host.port
DESCRIPTION
Telnetd is a server which supports the DARPA standard TELNET virtual terminal protocol. The
TELNET server is
invoked by inetd(BC) each time there
is a connection to the telnet service; see
,ervice,(5).
Telnetd operates by allocating a
pseud~terminal
device (see ptll(4)) for a client, then creating a
login proceS8 which has the slave side of the pseudo-terminal as Itdln, ItdOUt, and atderr.
Tel-
netd manipulates the master side of the pseudo terminal, implementing the TELNET protocol
and passing characters between the client and login process.
When a TELNET session is started up, telnetd sends a TELNET option to the client side indicat-
ing a willingness to do "remote echo" of characters. The pseudo terminal allocated to the client
is configured to operate in "cooked" mode, and with XTABS and CRMOD enabled (see ttll(4)).
Aside from this initial setup, the only mode changes telnetd will carry out are those required for
echoing characters at the client side of the connection.
Telnetd supports binary mode, and most or the common TELNET options, but does not, for
instance, support timing marks.
SEE ALSO
telnet(IC)
BUGS
A complete list or the options supported should be given here.
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Last change: 28 October 1983
Sun Release 1.1