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Kerberos: The Definitive Guide
book

Kerberos: The Definitive Guide

by Jason Garman
August 2003
Intermediate to advanced
270 pages
10h 9m
English
O'Reilly Media, Inc.
Content preview from Kerberos: The Definitive Guide

Building and configuring the distribution

Cyrus IMAP is a complex package and most of the build and configuration options relate to how it handles mail, and not its authentication mechanism. Therefore, we’re going to focus on the particular options necessary to enable GSSAPI support in Cyrus IMAP.

After acquiring the source distribution, untar it and the following configure line will configure Cyrus IMAP for GSSAPI and SASL support:

% ./configure --enable-gssapi=/usr/local --with-sasl=/usr/local

Once the configure step completes, Cyrus IMAP is ready to compile and install:

# make && make install

Once Cyrus has been installed, it can be configured to work with SASL to provide GSSAPI authentication to clients. The necessary SASL configuration information can be embedded into the imapd.conf file; insert sasl_ before every SASL-related configuration directive in imapd.conf. For example:

sasl_pwcheck_method: saslauthd
sasl_mech_list: gssapi plain pam

You’ll also need to create a keytab entry for the Cyrus IMAP server, in the form of imap/ hostname @ REALM and securely copy it into the IMAP server’s filesystem. The keytab should be readable by only the username that Cyrus IMAP runs as (a special user should be created for this purpose, as part of the installation process).

Once the configuration is in place, the Cyrus IMAP daemons can be started with the following command, assuming that the distribution has been installed into the default directory of /usr/cyrus:

# /usr/cyrus/bin/master &

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Publisher Resources

ISBN: 0596004036Errata Page