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Wiki source code of KerberosAndLDAP

Version 5.1 by Sirius Rayner-Karlsson on 2024/05/01 05:08
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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
9 $ sudo apt install krb5-kdc-ldap krb5-admin-server schema2ldif
10
11 }}}
12
13
14 Then load the ##kerberos## schema:
15
16 {{{
17
18 $ 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
19
20 adding new entry "cn=kerberos,cn=schema,cn=config"
21
22 }}}
23
24
25 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:
26
27 {{{
28
29 # ldapmodify -H ldap:~/~/nas.fqhn <<EOF
30
31 dn: olcDatabase={1}bdb,cn=config
32
33 add: olcDbIndex
34
35 olcDbIndex: krbPrincipalName eq,pres,sub
36
37 EOF
38
39 modifying entry "olcDatabase={1}bdb,cn=config"
40
41 }}}
42
43
44 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:
45
46
47 {{{
48 # ldapadd -x -D cn=admin,dc=example,dc=com -W <<EOF
49 dn: ou=Services,dc=example,dc=com
50 objectClass: organizationalUnit
51 objectClass: top
52 ou: Services
53
54 dn: ou=kerberos,ou=Services,dc=example,dc=com
55 objectClass: organizationalUnit
56 objectClass: top
57 ou: kerberos
58
59 dn: uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com
60 uid: kdc
61 objectClass: account
62 objectClass: simpleSecurityObject
63 userPassword: {CRYPT}x
64 description: Kerberos KDC Account
65
66 dn: uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com
67 uid: kadmin
68 objectClass: account
69 objectClass: simpleSecurityObject
70 userPassword: {CRYPT}x
71 description: Kerberos Admin Server Account
72 EOF
73 Enter LDAP Password: SECRET
74
75 adding new entry "ou=Services,dc=example,dc=com"
76
77 adding new entry "ou=kerberos,ou=Services,dc=example,dc=com"
78
79 adding new entry "uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com"
80
81 adding new entry "uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com"}}}
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