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.\" A man page for ipa-getkeytab
.\" Copyright (C) 2007 Red Hat, Inc.
.\"
.\" This program is free software; you can redistribute it and/or modify
.\" it under the terms of the GNU General Public License as published by
.\" the Free Software Foundation, either version 3 of the License, or
.\" (at your option) any later version.
.\"
.\" This program is distributed in the hope that it will be useful, but
.\" WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
.\" General Public License for more details.
.\"
.\" You should have received a copy of the GNU General Public License
.\" along with this program.  If not, see <http://www.gnu.org/licenses/>.
.\"
.\" Author: Karl MacMillan <kmacmill@redhat.com>
.\" Author: Simo Sorce <ssorce@redhat.com>
.\"
.TH "ipa-getkeytab" "1" "Oct 10 2007" "FreeIPA" "FreeIPA Manual Pages"
.SH "NAME"
ipa\-getkeytab \- Get a keytab for a Kerberos principal
.SH "SYNOPSIS"
ipa\-getkeytab \fB\-s\fR \fIipaserver\fR \fB\-p\fR \fIprincipal\-name\fR \fB\-k\fR \fIkeytab\-file\fR [ \fB\-e\fR encryption\-types ] [ \fB\-q\fR ] [ \fB\-D\fR|\fB\-\-binddn\fR \fIBINDDN\fR ] [ \fB\-w|\-\-bindpw\fR ] [ \fB\-P\fR|\fB\-\-password\fR \fIPASSWORD\fR ]

.SH "DESCRIPTION"
Retrieves a Kerberos \fIkeytab\fR.

Kerberos keytabs are used for services (like sshd) to
perform Kerberos authentication. A keytab is a file
with one or more secrets (or keys) for a Kerberos
principal.

A Kerberos service principal is a Kerberos identity
that can be used for authentication. Service principals
contain the name of the service, the hostname of the
server, and the realm name. For example, the following
is an example principal for an ldap server:

   ldap/foo.example.com@EXAMPLE.COM

When using ipa\-getkeytab the realm name is already
provided, so the principal name is just the service
name and hostname (ldap/foo.example.com from the
example above).

\fBWARNING:\fR retrieving the keytab resets the secret for the Kerberos principal.
This renders all other keytabs for that principal invalid.

This is used during IPA client enrollement to retrieve a host service principal and store it in /etc/krb5.keytab. It is possible to retrieve the keytab without Kerberos credentials if the host was pre\-created with a one\-time password. The keytab can be retrieved by binding as the host and authenticating with this one\-time password. The \fB\-D|\-\-binddn\fR and \fB\-w|\-\-bindpw\fR options are used for this authentication.
.SH "OPTIONS"
.TP
\fB\-s ipaserver\fR
The IPA server to retrieve the keytab from (FQDN).