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Changes for page KerberosAndLDAP

Last modified by Sirius Rayner-Karlsson on 2024/05/09 10:54

From version 15.1
edited by Sirius Rayner-Karlsson
on 2024/05/01 17:28
Change comment: There is no comment for this version
To version 13.1
edited by Sirius Rayner-Karlsson
on 2024/05/01 17:11
Change comment: There is no comment for this version

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... ... @@ -2,7 +2,6 @@
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 -
6 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 7  
8 8  ##{{{$ sudo apt install krb5-kdc-ldap krb5-admin-server schema2ldif}}}##
... ... @@ -10,60 +10,64 @@
10 10  
11 11  Then load the ##kerberos## schema:
12 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 -W}}}##
14 -##{{{Password:}}}##
15 -##{{{adding new entry "cn=kerberos,cn=schema,cn=config"}}}##
16 -##{{{$}}}##
12 +##{{{$ 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 Password: adding new entry "cn=kerberos,cn=schema,cn=config" $}}}##
17 17  
18 18  
19 -Having an index on the ##krbPrincipalName## improves performance and also suppresses some log messages if ##slapd## is configured to log more than default for the database(s) where you intend to store Kerberos data. As this is OpenLDAP on the Synology, it does not use ##mdb## format, it uses ##bdb##:
20 20  
21 -##{{{$ sudo ldapmodify -H ldap://nas.fqhn/ -D uid=root,cn=users,dc=example,dc=com -W <<EOF}}}##
22 -##{{{dn: olcDatabase={1}bdb,cn=config}}}##
23 -##{{{add: olcDbIndex}}}##
24 -##{{{olcDbIndex: krbPrincipalName eq,pres,sub}}}##
25 -##{{{EOF}}}##
26 -##{{{Password:}}}##
27 -##{{{modifying entry "olcDatabase={1}bdb,cn=config"}}}##
28 -##{{{$}}}##
16 +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:
29 29  
18 +{{{# ldapmodify -H ldap:~/~/nas.fqhn <<EOF
30 30  
31 -Next, you need to create and configure two entries which will be used by the Kerberos servers to connect to OpenLDAP. As you will not run the Kerberos KDC and Admin Server on the same host as OpenLDAP, these steps are required. In order to keep things nicely separated, everything will be created under a separate ##organizationalUnit##.
20 +dn: olcDatabase={1}bdb,cn=config
32 32  
33 -##{{{# ldapadd -H ldap://nas.fqhn/ -D uid=root,cn=users,dc=example,dc=com -W <<EOF}}}##
34 -##{{{dn: ou=Services,dc=example,dc=com}}}##
35 -##{{{objectClass: organizationalUnit}}}##
36 -##{{{objectClass: top}}}##
37 -##{{{ou: Services}}}##
38 -## ##
39 -##{{{dn: ou=kerberos,ou=Services,dc=example,dc=com}}}##
40 -##{{{objectClass: organizationalUnit}}}##
41 -##{{{objectClass: top}}}##
42 -##{{{ou: kerberos}}}##
43 -## ##
44 -##{{{dn: uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com}}}##
45 -##{{{uid: kdc}}}##
46 -##{{{objectClass: account}}}##
47 -##{{{objectClass: simpleSecurityObject}}}##
48 -##{{{userPassword: {CRYPT}x}}}##
49 -##{{{description: Kerberos KDC Account}}}##
50 -## ##
51 -##{{{dn: uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com}}}##
52 -##{{{uid: kadmin}}}##
53 -##{{{objectClass: account}}}##
54 -##{{{objectClass: simpleSecurityObject}}}##
55 -##{{{userPassword: {CRYPT}x}}}##
56 -##{{{description: Kerberos Admin Server Account}}}##
57 -##{{{EOF}}}##
58 -##{{{Enter LDAP Password: SECRET}}}##
59 -## ##
60 -##{{{adding new entry "ou=Services,dc=example,dc=com"}}}##
61 -## ##
62 -##{{{adding new entry "ou=kerberos,ou=Services,dc=example,dc=com"}}}##
63 -## ##
64 -##{{{adding new entry "uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com"}}}##
65 -## ##
66 -##{{{adding new entry "uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com"}}}##
22 +add: olcDbIndex
67 67  
24 +olcDbIndex: krbPrincipalName eq,pres,sub
68 68  
26 +EOF
27 +
28 +modifying entry "olcDatabase={1}bdb,cn=config"
29 +
30 +}}}
31 +
32 +
33 +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:
34 +
35 +
36 +{{{# ldapadd -x -D cn=admin,dc=example,dc=com -W <<EOF
37 +dn: ou=Services,dc=example,dc=com
38 +objectClass: organizationalUnit
39 +objectClass: top
40 +ou: Services
41 +
42 +dn: ou=kerberos,ou=Services,dc=example,dc=com
43 +objectClass: organizationalUnit
44 +objectClass: top
45 +ou: kerberos
46 +
47 +dn: uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com
48 +uid: kdc
49 +objectClass: account
50 +objectClass: simpleSecurityObject
51 +userPassword: {CRYPT}x
52 +description: Kerberos KDC Account
53 +
54 +dn: uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com
55 +uid: kadmin
56 +objectClass: account
57 +objectClass: simpleSecurityObject
58 +userPassword: {CRYPT}x
59 +description: Kerberos Admin Server Account
60 +EOF
61 +Enter LDAP Password: SECRET
62 +
63 +adding new entry "ou=Services,dc=example,dc=com"
64 +
65 +adding new entry "ou=kerberos,ou=Services,dc=example,dc=com"
66 +
67 +adding new entry "uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com"
68 +
69 +adding new entry "uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com"}}}
70 +
71 +
69 69