LOGIN(8)
NAME
login.krb5 - kerberos enhanced login program
SYNOPSIS
login.krb5 [-p] [-fFe username] [-r | -k | -K | -h hostname]
DESCRIPTION
login.krb5 is a modification of the BSD login program which is used for
two functions. It is the sub-process used by krlogind and telnetd to
initiate a user session and it is a replacement for the command-line
login program which, when invoked with a password, acquires Kerberos
tickets for the user.
login.krb5 will prompt for a username, or take one on the command line,
as login.krb5 username and will then prompt for a password. This password will be used to acquire Kerberos Version 5 tickets (if possible.)
It will also attempt to run aklog to get AFS tokens for the user. The
version 5 tickets will be tested against a local krb5.keytab if it is
available, in order to verify the tickets, before letting the user in.
However, if the password matches the entry in /etc/passwd the user will
be unconditionally allowed (permitting use of the machine in case of
network failure.)
OPTIONS
-p preserve the current environment
- -r hostname
- pass hostname to rlogind. Must be the last argument.
- -h hostname
- pass hostname to telnetd, etc. Must be the last argument.
- -f name
- Perform pre-authenticated login, e.g., datakit, xterm, etc.;
allows preauthenticated login as root. - -F name
- Perform pre-authenticated login, e.g., datakit, xterm, etc.;
allows preauthenticated login as root. - -e name
- Perform pre-authenticated, encrypted login. Must do term negotiation.
CONFIGURATION
login.krb5 is also configured via krb5.conf using the login stanza. A collection of options dealing with initial authentication are provided:
- krb5_get_tickets
- Use password to get V5 tickets. Default value true.
- krb_run_aklog
- Attempt to run aklog. Default value false.
- aklog_path
- Where to find it [not yet implemented.] Default value $(prefix)/bin/aklog.
- accept_passwd
- Don't accept plaintext passwords [not yet implemented]. Default value false.
DIAGNOSTICS
All diagnostic messages are returned on the connection or tty associated with stderr.