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Linux Server Security, Second Edition
book

Linux Server Security, Second Edition

by Michael D. Bauer
January 2005
Intermediate to advanced content levelIntermediate to advanced
544 pages
23h 44m
English
O'Reilly Media, Inc.
Content preview from Linux Server Security, Second Edition
This is the Title of the Book, eMatter Edition
Copyright © 2007 O’Reilly & Associates, Inc. All rights reserved.
Setting Up the Server
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227
tells slapd to listen on the loopback address (127.0.0.1) for ldap connections to the
default ldap port (TCP 389), and to listen on all local addresses for ldaps connec-
tions to the default ldaps port (TCP 636).
If you run Red Hat 7.3 or later, this is actually the default behavior: /etc/init.d/ldap
checks /etc/openldap/slapd.conf for TLS configuration information, and if it finds it,
sets the
-h option exactly like the one in the previous paragraph’s example. If you
run SUSE 8.1 or later, you can achieve the same thing by editing /etc/sysconfig/
openldap such that the value for
OPENLDAP_START_LDAPS is yes, and then editing /etc/
init.d/openldap to set the value for
SLAPD_URLS to ldap://127.0.0.1 (this variable is
defined early in the script, with a default value of ldap:///).
Other Linux distributions may have different ways of passing startup options like
-h
to slapd, but hopefully by now you get the idea and can figure out how to make
slapd’s listening-ports work the way you want them to.
Testing
So, does our TLS-enabled LDAP server actually work? A quick local test will tell us.
First, start LDAP:
/etc/init.d/ldap start
Next, use the ldapsearch command to do a simple query via loopback:
ldapsearch -x -H ldaps://localhost/ -b 'dc=wiremonkeys,dc=org' '(objectclass=*)' ...
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Publisher Resources

ISBN: 0596006705Supplemental ContentCatalog PageErrata