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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 4.1
edited by Sirius Rayner-Karlsson
on 2024/05/01 05:07
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 +~{~{~{
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 +{{{# ldapadd -x -D cn=admin,dc=example,dc=com -W <<EOF
48 +dn: ou=Services,dc=example,dc=com
49 +objectClass: organizationalUnit
50 +objectClass: top
51 +ou: Services
52 +
53 +dn: ou=kerberos,ou=Services,dc=example,dc=com
54 +objectClass: organizationalUnit
55 +objectClass: top
56 +ou: kerberos
57 +
58 +dn: uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com
59 +uid: kdc
60 +objectClass: account
61 +objectClass: simpleSecurityObject
62 +userPassword: {CRYPT}x
63 +description: Kerberos KDC Account
64 +
65 +dn: uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com
66 +uid: kadmin
67 +objectClass: account
68 +objectClass: simpleSecurityObject
69 +userPassword: {CRYPT}x
70 +description: Kerberos Admin Server Account
71 +EOF
72 +Enter LDAP Password: SECRET
73 +
74 +adding new entry "ou=Services,dc=example,dc=com"
75 +
76 +adding new entry "ou=kerberos,ou=Services,dc=example,dc=com"
77 +
78 +adding new entry "uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com"
79 +
80 +adding new entry "uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com"}}}
81 +
82 +
6 6