Changes for page KerberosAndLDAP

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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.
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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}}}##
8	8
9		-$ sudo apt install krb5-kdc-ldap krb5-admin-server schema2ldif
10	10
11		-}}}
12		-
13		-
14	14	Then load the ##kerberos## schema:
15	15
16		-~{~{~{
	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	+##{{{Enter LDAP Password:}}}##
	15	+##{{{adding new entry "cn=kerberos,cn=schema,cn=config"}}}##
	16	+##{{{$}}}##
17	17
18		-$ 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	19
20		-adding new entry "cn=kerberos,cn=schema,cn=config"
	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##:
21	21
22		-}}}
	21	+##{{{$ 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	+##{{{Enter LDAP Password:}}}##
	27	+##{{{modifying entry "olcDatabase={1}bdb,cn=config"}}}##
	28	+##{{{$}}}##
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24	24
25		-And add an index on the ##krbPrincipalName## (improves performance and also suppresses some log messages if ##slapd## is configured to log more than default) for the database(s) where you intend to store Kerberos data:
	31	+Next, you need to create and configure two entries which will be used by the Kerberos servers to connect to OpenLDAP. As you will not run the Kerberos KDC and Admin Server on the same host as OpenLDAP, these steps are required. In order to keep things nicely separated, everything will be created under a separate ##organizationalUnit##.
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27		-~{~{~{
	33	+##{{{$ 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:}}}##
	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"}}}##
28	28
29		-# ldapmodify -H ldap:~/~/nas.fqhn <<EOF
30	30
31		-dn: olcDatabase={1}bdb,cn=config
	69	+Now, it was at this point that I had a problem, because the LDAP server on the Synology did not like adding users with placeholder passwords. I ended up working around it using a different construct:
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33		-add: olcDbIndex
	71	+##{{{dn: cn=kadmin,ou=kerberos,ou=Services,dc=example,dc=com}}}##
	72	+##{{{sn: kadmin}}}##
	73	+##{{{cn: kadmin}}}##
	74	+##{{{objectClass: person}}}##
	75	+##{{{objectClass: pwdPolicy}}}##
	76	+##{{{pwdAttribute: userPassword}}}##
	77	+##{{{pwdMinLength: 8}}}##
	78	+##{{{pwdCheckQuality: 2}}}##
	79	+##{{{pwdPolicySubentry: cn=kadmin,ou=kerberos,ou=Services,dc=example,dc=com}}}##
	80	+##{{{userPassword: {SSHA}<hashed password>}}}##
	81	+##{{{description: Kerberos Admin Server Account}}}##
34	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		-
	83	+and that seems to have worked out fine as my KDC is fully functioning. It required modifying the rest of the guide with the fact that it no longer was ##uid=kadmin## and ##uid=kdc##, but rather ##cn=kadmin## and ##cn=kdc##. The most important thing is that it works.
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