On Аўт, 28 ліс 2023, Pradeep KNS wrote:
>ok but in my case i don't use AD,Windows authentication or replica etc,
>just the centralised authentication system all are redhat os installed
>servers.
>In this case also i need to create a base RID?
Yes. You keep ignoring my references to previous discussions.
You will not get it working without proper SIDs because we require PAC
presence to protect against Kerberos impersonation. This is not a
theoretical probability anymore since November 2022 Microsoft security
updates. The same attacks apply to all Kerberos environments and current
way of protecting against them is to utilize MS-PAC buffers with
appropriate signatures and checksums. PAC buffers require use of SIDs to
address objects and that is what we enforce now.
If you still want to know details, I'd suggest to watch at least the two
talks we gave at SambaXP past few years:
- "Kerberos" by Andrew Bartlett
https://sambaxp.org/fileadmin/user_upload/sambaxp2022-Slides/Bartlett-Kerberos.pdf
- Samba AD / MIT Kerberos: path out of experimental by me and Andreas
https://sambaxp.org/fileadmin/user_upload/sambaxp2023-Slides/Bokovoy_Schneider_sXP23_SambaAD_Kerberos.pdf
https://youtu.be/0_cdYuIYw0o
While these talk about Samba AD, the changes went to both Samba and
FreeIPA, as well as MIT Kerberos (and Microsoft's Active Directory too).
So, look at the KCS I gave, understand how to add RID bases to your new
ID range and fix your problem through that.
>
>On Tue, Nov 28, 2023 at 4:30 PM Alexander Bokovoy <abokovoy@redhat.com>
>wrote:
>
>> On Аўт, 28 ліс 2023, Pradeep KNS wrote:
>> >Alexander,
>> >
>> >Thanks for that document.Bit of that i did it but it dint worked looks
>> like
>> >i might followed some wrong steps.
>> >
>> >My default id range mentioned below
>> >ipa idrange-find --all --raw
>> >----------------
>> >2 ranges matched
>> >----------------
>> > dn: cn=REALM_id_range,cn=ranges,cn=etc,dc=$SUFFIX
>> > cn: REALM_id_range
>> > ipabaseid: 771000000
>> > ipaidrangesize: 200000
>> > ipabaserid: 1000
>> > ipasecondarybaserid: 100000000
>> > iparangetype: ipa-local
>> > objectclass: top
>> > objectclass: ipaIDrange
>> > objectclass: ipaDomainIDRange
>> >
>> > dn: cn=REALM_subid_range,cn=ranges,cn=etc,dc=SUFFIX
>> > cn: REALM_subid_range
>> > ipabaseid: 2147483648
>> > ipaidrangesize: 2147352576
>> > ipabaserid: 2147283648
>> > ipanttrusteddomainsid: S-1-5-21-738065-838566-1448868364
>> > iparangetype: ipa-ad-trust
>> > objectclass: top
>> > objectclass: ipaIDrange
>> > objectclass: ipaTrustedADDomainRange
>> >
>> >##################################
>> >Manually created ID range
>> >
>> >[root@ipa-mum1 ~]# ipa idrange-find --all --raw
>> >----------------
>> >3 ranges matched
>> >----------------
>> > dn: cn=REALM_id_new_range,cn=ranges,cn=etc,dc=SUFFIX
>> > cn: REALM_id_new_range
>> > ipabaseid: 1000
>> > ipaidrangesize: 200000
>> > iparangetype: ipa-local
>> > objectclass: ipaIDrange
>> > objectclass: ipadomainidrange
>>
>> You created a new ID range but this range has no RID bases. Therefore,
>> the range cannot be used for SID assignment.
>>
>> The KCS article has a section about RID bases and how to choose them,
>> please follow that.
>>
>> >
>> >Then i created the user name called test user post it dint created
>> expected
>> >user attribute
>> >
>> >root@ipa~]#ipa user-add testuser --first=Test --last=User -uid=5189
>> >--gidnumber=4141 --password
>> >root@ipa ~]# ipa user-show testuser --all
>> > dn: uid=testuser,cn=users,cn=accounts,dc=real
>> > User login: testuser
>> > First name: Test
>> > Last name: User
>> > Full name: Test User
>> > Display name: Testuser
>> > Initials: TU
>> > Home directory: /home/testuser
>> > GECOS: Test User
>> > Login shell: /bin/bash
>> > Principal name: testuser@REALM.COM
>> > Principal alias: testuser@REALM.COM
>> > User password expiration: 20231124144147Z
>> > UID: 5189
>> > GID: 4141
>> > Account disabled: False
>> > Preserved user: False
>> > Password: True
>> > Member of groups: ipausers
>> > Kerberos keys available: True
>> > ipauniqueid: 88e7da44-8ad7-11ee-b06e-a68c8b95f346
>> > krbextradata: AAIrtmBlcm9vdC9hZG1pbkBBTFBIQS1HUkVQLkNPTQA=
>> > krblastadminunlock: 20231124144147Z
>> > krblastpwdchange: 20231124144147Z
>> > krbloginfailedcount: 0
>> > mepmanagedentry: cn=testuser,cn=groups,cn=accounts,dc=example,dc=com
>> > objectclass: top, person, organizationalperson, inetorgperson, inetuser,
>> >posixaccount, krbprincipalaux, krbticketpolicyaux, ipaobject, ipasshuser,
>> >ipaSshGroupOfPubKeys, mepOriginEntry
>> >
>> >The above method followed but after creating another id range manually, I
>> >don't know where I missed post creation of ranges, for somehow it didn't
>> >work. That's why I followed that generic method creating users and
>> >modifying it manually.
>> >PLease suggest me.
>> >
>> >On Tue, Nov 28, 2023 at 2:56 PM Pradeep KNS <kns.pradeep@alpha-grep.com>
>> >wrote:
>> >
>> >> Thanks will go through it.
>> >>
>> >> On Tue, Nov 28, 2023 at 2:54 PM Alexander Bokovoy <abokovoy@redhat.com>
>> >> wrote:
>> >>
>> >>> On Аўт, 28 ліс 2023, Pradeep KNS wrote:
>> >>> >Could you please help me with those threads here to regenerate sid’s.
>> >>>
>> >>> https://access.redhat.com/articles/7027037
>> >>>
>> >>> >
>> >>> >
>> >>> >On Tue, 28 Nov 2023 at 2:27 PM, Alexander Bokovoy <
>> abokovoy@redhat.com>
>> >>> >wrote:
>> >>> >
>> >>> >> On Аўт, 28 ліс 2023, Pradeep KNS wrote:
>> >>> >> >Yeah,
>> >>> >> >But my default id range starts with 770000 but all my existing
>> >>> >> >infrastructure uid's are within 4 digits like 4147,8921,9756 like
>> >>> this.
>> >>> >> >Here I am facing an issue.
>> >>> >> >
>> >>> >> >That's why I am creating users with default id range and then
>> later I
>> >>> am
>> >>> >> >modifying it via uid's as per my infrastructure then ipantuserattrs
>> >>> >> created
>> >>> >> >and I am able to authenticate with password.
>> >>> >>
>> >>> >> This is wrong.
>> >>> >>
>> >>> >> >
>> >>> >> >Can you suggest to me that with this setup i can easily handle
>> >>> 350Users
>> >>> >> for
>> >>> >> >around 400 servers across different different locations with cache
>> of
>> >>> >> >storing on ipa clients.
>> >>> >>
>> >>> >> As I already said in other threads, create additional ID range that
>> >>> >> covers your 4-digit IDs, then re-run SID generation to make sure
>> those
>> >>> >> users get proper SIDs.
>> >>> >>
>> >>> >> This is covered in the KCS.
>> >>> >>
>> >>> >> >
>> >>> >> >On Tue, Nov 28, 2023 at 2:00 PM Alexander Bokovoy <
>> >>> abokovoy@redhat.com>
>> >>> >> >wrote:
>> >>> >> >
>> >>> >> >> Please don't drop mailing list.
>> >>> >> >>
>> >>> >> >> On Аўт, 28 ліс 2023, Pradeep KNS wrote:
>> >>> >> >> >Hey Alexander,
>> >>> >> >> >
>> >>> >> >> >Thanks For the Reply.
>> >>> >> >> >
>> >>> >> >> >But in my case i have fixed it by recreating the user on Ipa web
>> >>> UI and
>> >>> >> >> >observing ipantuserattrs created password logins are working
>> fine.
>> >>> >> >> >
>> >>> >> >> >But do I face any issues if I try to modify the base id range
>> >>> >> manually? as
>> >>> >> >> >per redhat docs which is not recommended to modify.
>> >>> >> >>
>> >>> >> >> If you have re-created your user and that new one works, it means
>> >>> >> >> underlying infrastructure works properly. Older user entries need
>> >>> to be
>> >>> >> >> fixed. Preferrably through a new ID range, if those entries use
>> IDs
>> >>> >> >> which are outside of the main ID range.
>> >>> >> >>
>> >>> >> >> >
>> >>> >> >> >Also on ipa 4.11 they support dedicated ssh key based
>> >>> >> >> >authentication.Ofcourse now also its working.
>> >>> >> >> >
>> >>> >> >> >My setup is that I have internal dns which is handled by a
>> puppet
>> >>> and
>> >>> >> >> >slowly will move it to a dedicated internal dns server so that's
>> >>> why i
>> >>> >> >> >opted for ipa installation without dns.
>> >>> >> >> >
>> >>> >> >> >On Tue, Nov 28, 2023 at 1:06 PM Alexander Bokovoy <
>> >>> abokovoy@redhat.com
>> >>> >> >
>> >>> >> >> >wrote:
>> >>> >> >> >
>> >>> >> >> >> On Пан, 27 ліс 2023, Pradeep KNS via FreeIPA-users wrote:
>> >>> >> >> >> >Hi Rob,
>> >>> >> >> >> >Thank you for your email. I've identified the issue.
>> >>> >> >> >> >When attempting to create a user using the 'ipa user-add'
>> >>> command
>> >>> >> and
>> >>> >> >> >> >defining the UID and GID according to my specifications, the
>> UID
>> >>> >> falls
>> >>> >> >> >> >within the 4-digit range, for instance, 4141. The
>> >>> >> >> >> >IPA IDs range during installation was set to 770000. Users
>> >>> created
>> >>> >> >> within
>> >>> >> >> >> >this range are accepted with their passwords. However, users
>> >>> created
>> >>> >> >> with
>> >>> >> >> >> >UIDs like 4141 or 4142 encounter issues.
>> >>> >> >> >> >
>> >>> >> >> >> >Looks like attributes, were not creating
>> >>> >> >> >> >
>> >>> >> >> >> >objectclass: top, person, organizationalperson,
>> inetorgperson,
>> >>> >> >> inetuser,
>> >>> >> >> >> >posixaccount, krbprincipalaux, krbticketpolicyaux, ipaobject,
>> >>> >> >> ipasshuser,
>> >>> >> >> >> >ipaSshGroupOfPubKeys, mepOriginEntry, ipantuserattrs
>> >>> >> >> >> >
>> >>> >> >> >> >If i mention uid and gid using ipa user-add command
>> >>> >> >> >> >ipantuserattrs is not getting create.
>> >>> >> >> >> >
>> >>> >> >> >> >I tried to modify default range but it dint happened.
>> >>> >> >> >>
>> >>> >> >> >> See my answers in a parallel thread 'kinit fails on freeipa
>> >>> master:
>> >>> >> File
>> >>> >> >> >> or directory not found'.
>> >>> >> >> >>
>> >>> >> >> >> >
>> >>> >> >> >> >
>> >>> >> >> >> >
>> >>> >> >> >> >On Mon, 27 Nov 2023 at 9:41 PM, Rob Crittenden <
>> >>> rcritten@redhat.com
>> >>> >> >
>> >>> >> >> >> wrote:
>> >>> >> >> >> >
>> >>> >> >> >> >> Pradeep KNS wrote:
>> >>> >> >> >> >> > Hi,
>> >>> >> >> >> >> > I have installed an ipa with internal dns.After
>> installing
>> >>> >> updated
>> >>> >> >> >> >> > entries on dns as well.
>> >>> >> >> >> >> >
>> >>> >> >> >> >> > My main criteria is to communicate with ipa clients with
>> ssh
>> >>> >> >> keybased
>> >>> >> >> >> >> > authentication which is working fine.
>> >>> >> >> >> >> >
>> >>> >> >> >> >> > Today i tot of i want to test with password based
>> >>> authentication
>> >>> >> >> which
>> >>> >> >> >> >> > is not happening.I dont know where i am missing
>> >>> >> >> >> >> >
>> >>> >> >> >> >> >
>> >>> >> >> >> >> > [root@example.com <mailto:root@example.com>]# ipa
>> --version
>> >>> >> >> >> >> > VERSION: 4.10.1, API_VERSION: 2.251
>> >>> >> >> >> >> > [root@example.com <mailto:root@example.com>]#
>> >>> >> >> >> >> >
>> >>> >> >> >> >> > ********************** PREVIOUS MESSAGE WAS TRIGGERED BY
>> THE
>> >>> >> >> FOLLOWING
>> >>> >> >> >> >> > BACKTRACE:
>> >>> >> >> >> >> > * (2023-11-23 19:33:16): [krb5_child[11588]]
>> >>> [tgt_req_child]
>> >>> >> >> >> >> > (0x1000): [RID#15] Password was expired
>> >>> >> >> >> >>
>> >>> >> >> >> >> The user's password is expired.
>> >>> >> >> >> >>
>> >>> >> >> >> >> IPA intends that only the end-user knows their password. So
>> >>> if it
>> >>> >> is
>> >>> >> >> set
>> >>> >> >> >> >> or reset by an administrator the user will need to change
>> it.
>> >>> >> >> >> >>
>> >>> >> >> >> >> Is the user not prompted to reset it?
>> >>> >> >> >> >>
>> >>> >> >> >> >> rob
>> >>> >> >> >> >>
>> >>> >> >> >> >> > * (2023-11-23 19:33:16): [krb5_child[11588]]
>> >>> >> >> [sss_krb5_responder]
>> >>> >> >> >> >> > (0x4000): [RID#15] Got question [password].
>> >>> >> >> >> >> > * (2023-11-23 19:33:16): [krb5_child[11588]]
>> >>> >> [map_krb5_error]
>> >>> >> >> >> >> > (0x0020): [RID#15] 2138: [-1765328324][Generic error (see
>> >>> >> e-text)]
>> >>> >> >> >> >> > ********************** BACKTRACE DUMP ENDS HERE
>> >>> >> >> >> >> > *********************************
>> >>> >> >> >> >> >
>> >>> >> >> >> >> > ssh log
>> >>> >> >> >> >> >
>> >>> >> >> >> >> > Nov 23 19:33:16 test-example.com <
>> http://test-example.com>
>> >>> >> >> >> sshd[11586]:
>> >>> >> >> >> >> > pam_sss(sshd:auth): authentication failure; logname=
>> uid=0
>> >>> >> euid=0
>> >>> >> >> >> >> > tty=ssh ruser= rhost=10.10.1.1 user=harsh
>> >>> >> >> >> >> > Nov 23 19:33:16 test-example.com <
>> http://test-example.com>
>> >>> >> >> >> sshd[11586]:
>> >>> >> >> >> >> > pam_sss(sshd:auth): received for user harsh: 4 (System
>> >>> error)
>> >>> >> >> >> >> > Nov 23 19:33:18test-example.com <
>> http://18test-example.com>
>> >>> >> >> >> sshd[11584]:
>> >>> >> >> >> >> > error: PAM: Authentication failure for harsh from
>> 10.10.1.1
>> >>> >> >> >> >> > Nov 23 19:33:20 test-example.com <
>> http://test-example.com>
>> >>> >> >> >> sshd[11584]:
>> >>> >> >> >> >> > Connection closed by authenticating user harsh 10.10.1.1
>> >>> port
>> >>> >> 47724
>> >>> >> >> >> >> > [preauth]
>> >>> >> >> >> >>
>> >>> >> >> >> >>
>> >>> >> >> >> >>
>> >>> >> >> >>
>> >>> >> >> >>
>> >>> >> >> >>
>> >>> >> >> >>
>> >>> >> >> >> --
>> >>> >> >> >> / Alexander Bokovoy
>> >>> >> >> >> Sr. Principal Software Engineer
>> >>> >> >> >> Security / Identity Management Engineering
>> >>> >> >> >> Red Hat Limited, Finland
>> >>> >> >> >>
>> >>> >> >> >>
>> >>> >> >>
>> >>> >> >>
>> >>> >> >>
>> >>> >> >>
>> >>> >> >> --
>> >>> >> >> / Alexander Bokovoy
>> >>> >> >> Sr. Principal Software Engineer
>> >>> >> >> Security / Identity Management Engineering
>> >>> >> >> Red Hat Limited, Finland
>> >>> >> >>
>> >>> >> >>
>> >>> >>
>> >>> >>
>> >>> >>
>> >>> >>
>> >>> >> --
>> >>> >> / Alexander Bokovoy
>> >>> >> Sr. Principal Software Engineer
>> >>> >> Security / Identity Management Engineering
>> >>> >> Red Hat Limited, Finland
>> >>> >>
>> >>> >>
>> >>>
>> >>>
>> >>>
>> >>>
>> >>> --
>> >>> / Alexander Bokovoy
>> >>> Sr. Principal Software Engineer
>> >>> Security / Identity Management Engineering
>> >>> Red Hat Limited, Finland
>> >>>
>> >>>
>>
>>
>>
>>
>> --
>> / Alexander Bokovoy
>> Sr. Principal Software Engineer
>> Security / Identity Management Engineering
>> Red Hat Limited, Finland
>>
>>
--
/ Alexander Bokovoy
Sr. Principal Software Engineer
Security / Identity Management Engineering
Red Hat Limited, Finland