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Wiki source code of KerberosAndLDAP

Version 6.1 by Sirius Rayner-Karlsson on 2024/05/01 17:00

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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 {{{ $ sudo apt install krb5-kdc-ldap krb5-admin-server schema2ldif }}}
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9
10 Then load the ##kerberos## schema:
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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 }}}
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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 }}}
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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:
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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"}}}
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