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RLOGIN(1)		  BSD General Commands Manual		     RLOGIN(1)

NAME
     rlogin -- remote login

SYNOPSIS
     rlogin [-468DEKLdx] [-e char] [-i localname] [-k realm] [-l username]
     host

DESCRIPTION
     The rlogin	utility	starts a terminal session on a remote host host.

     The rlogin	utility	first attempts to use the Kerberos authorization mech-
     anism, described below.  If the remote host does not support Kerberos the
     standard Berkeley rhosts authorization mechanism is used.	The options
     are as follows:

     -4	   Use IPv4 addresses only.

     -6	   Use IPv6 addresses only.

     -8	   The -8 option allows	an eight-bit input data	path at	all times;
	   otherwise parity bits are stripped except when the remote side's
	   stop	and start characters are other than ^S/^Q.

     -D	   The -D option sets the TCP_NODELAY socket option which can improve
	   interactive response	at the expense of increased network load.

     -E	   The -E option stops any character from being	recognized as an es-
	   cape	character.  When used with the -8 option, this provides	a com-
	   pletely transparent connection.

     -K	   The -K option turns off all Kerberos	authentication.

     -L	   The -L option allows	the rlogin session to be run in	"litout" (see
	   tty(4)) mode.

     -d	   The -d option turns on socket debugging (see	setsockopt(2)) on the
	   TCP sockets used for	communication with the remote host.

     -e	   The -e option allows	user specification of the escape character,
	   which is "~"	by default.  This specification	may be as a literal
	   character, or as an octal value in the form \nnn.

     -i	   The -i option allows	the caller to specify a	different local	name
	   to be used for authentication.  This	option is restricted to	pro-
	   cesses with uid 0.

     -k	   The -k option requests rlogin to obtain tickets for the remote host
	   in realm realm instead of the remote	host's realm as	determined by
	   krb_realmofhost(3).

     -l	   The -l option specifies a different username	for the	remote login.
	   If this option is not specified, your local username	will be	used.

     -x	   The -x option turns on DES encryption for all data passed via the
	   rlogin session.  This may impact response time and CPU utilization,
	   but provides	increased security.

     A line of the form	"<escape char>".  disconnects from the remote host.
     Similarly,	the line "<escape char>^Z" will	suspend	the rlogin session,
     and "<escape char><delayed-suspend	char>" suspends	the send portion of
     the rlogin, but allows output from	the remote system.  By default,	the
     tilde ("~") character is the escape character, and	normally control-Y
     ("^Y") is the delayed-suspend character.

     All echoing takes place at	the remote site, so that (except for delays)
     the rlogin	is transparent.	 Flow control via ^S/^Q	and flushing of	input
     and output	on interrupts are handled properly.

KERBEROS AUTHENTICATION
     Each user may have	a private authorization	list in	the file .klogin in
     their home	directory.  Each line in this file should contain a Kerberos
     principal name of the form	principal.instance@realm.  If the originating
     user is authenticated to one of the principals named in .klogin, access
     is	granted	to the account.	 The principal accountname.@localrealm is
     granted access if there is	no .klogin file.  Otherwise a login and	pass-
     word will be prompted for on the remote machine as	in login(1).  To avoid
     certain security problems,	the .klogin file must be owned by the remote
     user.

     If	Kerberos authentication	fails, a warning message is printed and	the
     standard Berkeley rlogin is used instead.

ENVIRONMENT
     The following environment variable	is utilized by rlogin:

     TERM  Determines the user's terminal type.

SEE ALSO
     login(1), rsh(1), telnet(1), setsockopt(2), kerberos(3),
     krb_realmofhost(3), krb_sendauth(3), ruserok(3), tty(4), auth.conf(5),
     hosts(5), hosts.equiv(5), rlogind(8), rshd(8)

FILES
     /etc/hosts
     /etc/hosts.equiv
     /etc/auth.conf
     $HOME/.rhosts
     $HOME/.klogin

HISTORY
     The rlogin	command	appeared in 4.2BSD.

     IPv6 support was added by WIDE/KAME project.

BUGS
     The rlogin	utility	will be	replaced by telnet(1) in the near future.

     More of the environment should be propagated.

BSD				 June 6, 1993				   BSD

NAME | SYNOPSIS | DESCRIPTION | KERBEROS AUTHENTICATION | ENVIRONMENT | SEE ALSO | FILES | HISTORY | BUGS

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