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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 14.1
edited by Sirius Rayner-Karlsson
on 2024/05/01 17:15
Change comment: There is no comment for this version

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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 5  
6 +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:
7 +
8 +##{{{$ sudo apt install krb5-kdc-ldap krb5-admin-server schema2ldif}}}##
9 +
10 +
11 +Then load the ##kerberos## schema:
12 +
13 +##{{{$ 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}}}##
14 +
15 +##{{{Password:}}}##
16 +
17 +##{{{adding new entry "cn=kerberos,cn=schema,cn=config"}}}##
18 +
19 +##{{{$}}}##
20 +
21 +
22 +Having an index on the ##krbPrincipalName## improves performance and also suppresses some log messages if ##slapd## is configured to log more than default for the database(s) where you intend to store Kerberos data. As this is OpenLDAP on the Synology, it does not use mdb format, it uses bdb:
23 +
24 +##{{{$ sudo ldapmodify -H ldap://nas.fqhn <<EOF
25 +dn: olcDatabase={1}bdb,cn=config
26 +add: olcDbIndex
27 +olcDbIndex: krbPrincipalName eq,pres,sub
28 +EOF
29 +Password:
30 +
31 +modifying entry "olcDatabase={1}bdb,cn=config"
32 +$
33 +}}}##
34 +
35 +
36 +
37 +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:
38 +
39 +
40 +{{{# ldapadd -x -D cn=admin,dc=example,dc=com -W <<EOF
41 +dn: ou=Services,dc=example,dc=com
42 +objectClass: organizationalUnit
43 +objectClass: top
44 +ou: Services
45 +
46 +dn: ou=kerberos,ou=Services,dc=example,dc=com
47 +objectClass: organizationalUnit
48 +objectClass: top
49 +ou: kerberos
50 +
51 +dn: uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com
52 +uid: kdc
53 +objectClass: account
54 +objectClass: simpleSecurityObject
55 +userPassword: {CRYPT}x
56 +description: Kerberos KDC Account
57 +
58 +dn: uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com
59 +uid: kadmin
60 +objectClass: account
61 +objectClass: simpleSecurityObject
62 +userPassword: {CRYPT}x
63 +description: Kerberos Admin Server Account
64 +EOF
65 +Enter LDAP Password: SECRET
66 +
67 +adding new entry "ou=Services,dc=example,dc=com"
68 +
69 +adding new entry "ou=kerberos,ou=Services,dc=example,dc=com"
70 +
71 +adding new entry "uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com"
72 +
73 +adding new entry "uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com"}}}
74 +
75 +
6 6