Changes for page KerberosAndLDAP
Last modified by Sirius Rayner-Karlsson on 2024/05/09 10:54
From version 11.1
edited by Sirius Rayner-Karlsson
on 2024/05/01 17:06
on 2024/05/01 17:06
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To version 15.1
edited by Sirius Rayner-Karlsson
on 2024/05/01 17:28
on 2024/05/01 17:28
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... ... @@ -2,77 +2,68 @@ 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 + 5 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 6 7 -''' 8 -$ sudo apt install krb5-kdc-ldap krb5-admin-server schema2ldif 9 -''' 8 +##{{{$ sudo apt install krb5-kdc-ldap krb5-admin-server schema2ldif}}}## 10 10 10 + 11 11 Then load the ##kerberos## schema: 12 12 13 -''' 14 -$ 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 15 -Password: 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 +##{{{$}}}## 16 16 17 -adding new entry "cn=kerberos,cn=schema,cn=config" 18 -''' 19 19 19 +Having an index on the ##krbPrincipalName## improves performance and also suppresses some log messages if ##slapd## is configured to log more than default for the database(s) where you intend to store Kerberos data. As this is OpenLDAP on the Synology, it does not use ##mdb## format, it uses ##bdb##: 20 20 21 +##{{{$ 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 +##{{{$}}}## 21 21 22 -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: 23 23 24 - {{{#ldapmodify-Hldap:~/~/nas.fqhn<<EOF31 +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##. 25 25 26 -dn: olcDatabase={1}bdb,cn=config 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"}}}## 27 27 28 -add: olcDbIndex 29 29 30 -olcDbIndex: krbPrincipalName eq,pres,sub 31 - 32 -EOF 33 - 34 -modifying entry "olcDatabase={1}bdb,cn=config" 35 - 36 -}}} 37 - 38 - 39 -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: 40 - 41 - 42 -{{{# ldapadd -x -D cn=admin,dc=example,dc=com -W <<EOF 43 -dn: ou=Services,dc=example,dc=com 44 -objectClass: organizationalUnit 45 -objectClass: top 46 -ou: Services 47 - 48 -dn: ou=kerberos,ou=Services,dc=example,dc=com 49 -objectClass: organizationalUnit 50 -objectClass: top 51 -ou: kerberos 52 - 53 -dn: uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com 54 -uid: kdc 55 -objectClass: account 56 -objectClass: simpleSecurityObject 57 -userPassword: {CRYPT}x 58 -description: Kerberos KDC Account 59 - 60 -dn: uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com 61 -uid: kadmin 62 -objectClass: account 63 -objectClass: simpleSecurityObject 64 -userPassword: {CRYPT}x 65 -description: Kerberos Admin Server Account 66 -EOF 67 -Enter LDAP Password: SECRET 68 - 69 -adding new entry "ou=Services,dc=example,dc=com" 70 - 71 -adding new entry "ou=kerberos,ou=Services,dc=example,dc=com" 72 - 73 -adding new entry "uid=kdc,ou=kerberos,ou=Services,dc=example,dc=com" 74 - 75 -adding new entry "uid=kadmin,ou=kerberos,ou=Services,dc=example,dc=com"}}} 76 - 77 - 78 78