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Changes for page KerberosAndLDAP

Last modified by Sirius Rayner-Karlsson on 2024/05/09 10:54
From version 2.1
edited by Sirius Rayner-Karlsson
on 2024/05/01 05:00
Change comment: There is no comment for this version
To version 6.1
edited by Sirius Rayner-Karlsson
on 2024/05/01 17:00
Change comment: There is no comment for this version

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2 2  
3 3  The guide I followed was [[https:~~/~~/wiki.debian.org/LDAP/OpenLDAPSetup#Kerberos>>https://wiki.debian.org/LDAP/OpenLDAPSetup#Kerberos]] which while it worked required some minor tweaks. I obtained edit privileges for the Debian Wiki and updated the guide with the fixes that I found. I however have a Synology NAS and that can run an LDAP Server. So this guide differs a little from the upstream Debian Guide.
4 4  
5 +First, install the packages containing the LDAP-enabled Kerberos servers ([[krb5-kdc-ldap>>url:https://packages.debian.org/krb5-kdc-ldap]] and [[krb5-admin-server>>url:https://packages.debian.org/krb5-admin-server]]) and the [[schema2ldif>>url:https://packages.debian.org/schema2ldif]] tool:
5 5  
7 +{{{ $ sudo apt install krb5-kdc-ldap krb5-admin-server schema2ldif }}}
8 +
9 +
10 +Then load the ##kerberos## schema:
11 +
12 +{{{$ zcat /usr/share/doc/krb5-kdc-ldap/kerberos.openldap.ldif.gz | ldapadd -H ldap:~/~/nas.fqdn/ -D uid=root,cn=users,dc=example,dc=com
13 +
14 +adding new entry "cn=kerberos,cn=schema,cn=config"
15 +
16 +}}}
17 +
18 +
19 +And add an index on the ##krbPrincipalName## (improves performance and also suppresses some log messages if ##slapd## is configured to log more than default) for the database(s) where you intend to store Kerberos data:
20 +
21 +{{{# ldapmodify -H ldap:~/~/nas.fqhn <<EOF
22 +
23 +dn: olcDatabase={1}bdb,cn=config
24 +
25 +add: olcDbIndex
26 +
27 +olcDbIndex: krbPrincipalName eq,pres,sub
28 +
29 +EOF
30 +
31 +modifying entry "olcDatabase={1}bdb,cn=config"
32 +
33 +}}}
34 +
35 +
36 +Next, you need to create and configure two entries which will be used by the Kerberos servers to connect to OpenLDAP. If you are running Kerberos and OpenLDAP on the same system, these steps are optional, but recommended. In order to keep things nicely separated, everything will be created under a separate ##organizationalUnit##. Note that a simple bind (##-x -D##) is used instead of an ##EXTERNAL## bind since write access to the dc=example,dc=com DIT is necessary:
37 +
38 +
39 +{{{# ldapadd -x -D cn=admin,dc=example,dc=com -W <<EOF
40 +dn: ou=Services,dc=example,dc=com
41 +objectClass: organizationalUnit
42 +objectClass: top
43 +ou: Services
44 +
45 +dn: ou=kerberos,ou=Services,dc=example,dc=com
46 +objectClass: organizationalUnit
47 +objectClass: top
48 +ou: kerberos
49 +
50 +dn: uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com
51 +uid: kdc
52 +objectClass: account
53 +objectClass: simpleSecurityObject
54 +userPassword: {CRYPT}x
55 +description: Kerberos KDC Account
56 +
57 +dn: uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com
58 +uid: kadmin
59 +objectClass: account
60 +objectClass: simpleSecurityObject
61 +userPassword: {CRYPT}x
62 +description: Kerberos Admin Server Account
63 +EOF
64 +Enter LDAP Password: SECRET
65 +
66 +adding new entry "ou=Services,dc=example,dc=com"
67 +
68 +adding new entry "ou=kerberos,ou=Services,dc=example,dc=com"
69 +
70 +adding new entry "uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com"
71 +
72 +adding new entry "uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com"}}}
73 +
74 +
6 6