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Wiki source code of KerberosAndLDAP

Version 11.1 by Sirius Rayner-Karlsson on 2024/05/01 17:06
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1 = Debian =
2
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
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:
6
7 '''
8 $ sudo apt install krb5-kdc-ldap krb5-admin-server schema2ldif
9 '''
10
11 Then load the ##kerberos## schema:
12
13 '''
14 $ 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
15 Password:
16
17 adding new entry "cn=kerberos,cn=schema,cn=config"
18 '''
19
20
21
22 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:
23
24 {{{# ldapmodify -H ldap:~/~/nas.fqhn <<EOF
25
26 dn: olcDatabase={1}bdb,cn=config
27
28 add: olcDbIndex
29
30 olcDbIndex: krbPrincipalName eq,pres,sub
31
32 EOF
33
34 modifying entry "olcDatabase={1}bdb,cn=config"
35
36 }}}
37
38
39 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:
40
41
42 {{{# ldapadd -x -D cn=admin,dc=example,dc=com -W <<EOF
43 dn: ou=Services,dc=example,dc=com
44 objectClass: organizationalUnit
45 objectClass: top
46 ou: Services
47
48 dn: ou=kerberos,ou=Services,dc=example,dc=com
49 objectClass: organizationalUnit
50 objectClass: top
51 ou: kerberos
52
53 dn: uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com
54 uid: kdc
55 objectClass: account
56 objectClass: simpleSecurityObject
57 userPassword: {CRYPT}x
58 description: Kerberos KDC Account
59
60 dn: uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com
61 uid: kadmin
62 objectClass: account
63 objectClass: simpleSecurityObject
64 userPassword: {CRYPT}x
65 description: Kerberos Admin Server Account
66 EOF
67 Enter LDAP Password: SECRET
68
69 adding new entry "ou=Services,dc=example,dc=com"
70
71 adding new entry "ou=kerberos,ou=Services,dc=example,dc=com"
72
73 adding new entry "uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com"
74
75 adding new entry "uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com"}}}
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