Thank you for your prompt response.
here is the out put of /var/log/krb5kdc.log during my login attempt.

Feb 01 00:25:10 ipa1.example.com krb5kdc[3755](info): AS_REQ (6 etypes
{aes256-cts-hmac-sha1-96(18), camellia256-cts-cmac(26),
aes128-cts-hmac-sha1-96(17), camellia128-cts-cmac(25),
aes256-cts-hmac-sha384-192(20), aes128-cts-hmac-sha256-128(19)}) 10.2.1.50:
NEEDED_PREAUTH: host/ipa1.example....@example.com for krbtgt/
example....@example.com, Additional pre-authentication required
Feb 01 00:25:10 ipa1.example.com krb5kdc[3755](info): closing down fd 12
Feb 01 00:25:10 ipa1.example.com krb5kdc[3755](info): AS_REQ (6 etypes
{aes256-cts-hmac-sha1-96(18), camellia256-cts-cmac(26),
aes128-cts-hmac-sha1-96(17), camellia128-cts-cmac(25),
aes256-cts-hmac-sha384-192(20), aes128-cts-hmac-sha256-128(19)}) 10.2.1.50:
ISSUE: authtime 1643657110, etypes {rep=aes256-cts-hmac-sha1-96(18),
tkt=aes256-cts-hmac-sha1-96(18), ses=aes256-cts-hmac-sha1-96(18)}, host/
ipa1.example....@example.com for krbtgt/example....@example.com
Feb 01 00:25:10 ipa1.example.com krb5kdc[3755](info): closing down fd 12
Feb 01 00:25:10 ipa1.example.com krb5kdc[3755](info): TGS_REQ (6 etypes
{aes256-cts-hmac-sha1-96(18), aes256-cts-hmac-sha384-192(20),
camellia256-cts-cmac(26), aes128-cts-hmac-sha1-96(17),
aes128-cts-hmac-sha256-128(19), camellia128-cts-cmac(25)}) 10.2.1.50:
ISSUE: authtime 1643657110, etypes {rep=aes256-cts-hmac-sha1-96(18),
tkt=aes256-cts-hmac-sha1-96(18), ses=aes256-cts-hmac-sha1-96(18)}, host/
ipa1.example....@example.com for ldap/ipa1.example....@example.com
Feb 01 00:25:10 ipa1.example.com krb5kdc[3755](info): closing down fd 12
Feb 01 00:25:43 ipa1.example.com krb5kdc[3753](info): AS_REQ (6 etypes
{aes256-cts-hmac-sha1-96(18), aes256-cts-hmac-sha384-192(20),
camellia256-cts-cmac(26), aes128-cts-hmac-sha1-96(17),
aes128-cts-hmac-sha256-128(19), camellia128-cts-cmac(25)}) 10.2.1.50:
NEEDED_PREAUTH: WELLKNOWN/anonym...@example.com for krbtgt/
example....@example.com, Additional pre-authentication required
Feb 01 00:25:43 ipa1.example.com krb5kdc[3753](info): closing down fd 12
Feb 01 00:25:44 ipa1.example.com krb5kdc[3755](info): AS_REQ (6 etypes
{aes256-cts-hmac-sha1-96(18), aes256-cts-hmac-sha384-192(20),
camellia256-cts-cmac(26), aes128-cts-hmac-sha1-96(17),
aes128-cts-hmac-sha256-128(19), camellia128-cts-cmac(25)}) 10.2.1.50:
ISSUE: authtime 1643657144, etypes {rep=aes256-cts-hmac-sha1-96(18),
tkt=aes256-cts-hmac-sha1-96(18), ses=aes256-cts-hmac-sha1-96(18)},
WELLKNOWN/anonym...@example.com for krbtgt/example....@example.com
Feb 01 00:25:44 ipa1.example.com krb5kdc[3755](info): closing down fd 12
Feb 01 00:25:44 ipa1.example.com krb5kdc[3755](info): AS_REQ (6 etypes
{aes256-cts-hmac-sha1-96(18), aes256-cts-hmac-sha384-192(20),
camellia256-cts-cmac(26), aes128-cts-hmac-sha1-96(17),
aes128-cts-hmac-sha256-128(19), camellia128-cts-cmac(25)}) 10.2.1.50:
NEEDED_PREAUTH: mukh...@example.com for krbtgt/example....@example.com,
Additional pre-authentication required
Feb 01 00:25:44 ipa1.example.com krb5kdc[3755](info): closing down fd 12
Feb 01 00:25:44 ipa1.example.com krb5kdc[3755](info): AS_REQ (6 etypes
{aes256-cts-hmac-sha1-96(18), aes256-cts-hmac-sha384-192(20),
camellia256-cts-cmac(26), aes128-cts-hmac-sha1-96(17),
aes128-cts-hmac-sha256-128(19), camellia128-cts-cmac(25)}) 10.2.1.50:
ISSUE: authtime 1643657144, etypes {rep=aes256-cts-hmac-sha1-96(18),
tkt=aes256-cts-hmac-sha1-96(18), ses=aes256-cts-hmac-sha1-96(18)},
mukh...@example.com for krbtgt/example....@example.com
Feb 01 00:25:44 ipa1.example.com krb5kdc[3755](info): closing down fd 12
Feb 01 00:25:44 ipa1.example.com krb5kdc[3754](Error): PAC issue: PAC
record claims domain SID different to local domain SID or any trusted
domain SID: local [S-1-5-21-4170108275-2486169439-623049963], PAC [
S-1-5-21-4279381677-1236361367-2895659079]
Feb 01 00:25:44 ipa1.example.com krb5kdc[3754](info): TGS_REQ :
handle_authdata (-1765328364)
Feb 01 00:25:44 ipa1.example.com krb5kdc[3754](info): TGS_REQ (6 etypes
{aes256-cts-hmac-sha1-96(18), aes256-cts-hmac-sha384-192(20),
camellia256-cts-cmac(26), aes128-cts-hmac-sha1-96(17),
aes128-cts-hmac-sha256-128(19), camellia128-cts-cmac(25)}) 10.2.1.50:
HANDLE_AUTHDATA: authtime 1643657144, etypes {rep=UNSUPPORTED:(0)}
mukh...@example.com for HTTP/ipa1.example....@example.com, TGT has been
revoked
Feb 01 00:25:44 ipa1.example.com krb5kdc[3754](info): closing down fd 12
Feb 01 00:25:44 ipa1.example.com krb5kdc[3755](Error): PAC issue: PAC
record claims domain SID different to local domain SID or any trusted
domain SID: local [S-1-5-21-4170108275-2486169439-623049963], PAC [
S-1-5-21-4279381677-1236361367-2895659079]
Feb 01 00:25:44 ipa1.example.com krb5kdc[3755](info): TGS_REQ :
handle_authdata (-1765328364)
Feb 01 00:25:44 ipa1.example.com krb5kdc[3755](info): TGS_REQ (6 etypes
{aes256-cts-hmac-sha1-96(18), aes256-cts-hmac-sha384-192(20),
camellia256-cts-cmac(26), aes128-cts-hmac-sha1-96(17),
aes128-cts-hmac-sha256-128(19), camellia128-cts-cmac(25)}) 10.2.1.50:
HANDLE_AUTHDATA: authtime 1643657144, etypes {rep=UNSUPPORTED:(0)}
mukh...@example.com for HTTP/ipa1.example....@example.com, TGT has been
revoked
Feb 01 00:25:44 ipa1.example.com krb5kdc[3755](info): closing down fd 12


There is not much activity log in  /var/log/httpd/error_log:

[Tue Feb 01 00:20:59.340501 2022] [wsgi:error] [pid 10150:tid
139780524480256] [remote 10.2.3.188:49652] ipa: INFO:
[jsonserver_i18n_messages] UNKNOWN: i18n_messages(version='2.245'): SUCCESS
[Tue Feb 01 00:25:44.539447 2022] [wsgi:error] [pid 10149:tid
139780524480256] [remote 10.2.3.188:49753] ipa: INFO: 401 Unauthorized:
Major (851968): Unspecified GSS failure.  Minor code may provide more
information, Minor (2598844948): TGT has been revoked

On Tue, Feb 1, 2022 at 12:17 AM Alexander Bokovoy <aboko...@redhat.com>
wrote:

> On la, 29 tammi 2022, code bugs via FreeIPA-users wrote:
> >Hello,
> >
> >-IPA WebGUI login fails with "Login failed due to an unknown reason"
> >-After upgrading IPA, can no longer log into the WebGUI
> >Version/Release/Distribution
> >
> >$ cat /etc/centos-release
> >CentOS Linux release 8.5.2111
> >$ rpm -q freeipa-server freeipa-client ipa-server ipa-client 389-ds-base
> >pki-ca krb5-server
> >package freeipa-server is not installed
> >package freeipa-client is not installed
> >ipa-server-4.9.6-10.module_el8.5.0+1055+c415bbe9.x86_64
> >ipa-client-4.9.6-10.module_el8.5.0+1055+c415bbe9.x86_64
> >389-ds-base-1.4.3.23-12.module_el8.5.0+1056+b3c5a4b9.x86_64
> >pki-ca-10.11.2-2.module_el8.5.0+945+a81e57da.noarch
> >krb5-server-1.18.2-14.el8.x86_64
> >Additional info:
> >
> >tail /var/log/httpd/error_log
> >
> >[wsgi:error] [pid 8833:tid 139812622513920] [remote 10.2.3.80:51404] ipa:
> >INFO: 401 Unauthorized: Major (851968): Unspecified GSS failure. Minor
> code
> >may provide more information, Minor (2598844948): TGT has been revoked
>
> Please show entries in /var/log/krb5kdc.log corresponding to this
> timeframe. If TGT is revoked, it most likely is documented why in that
> log. Also, if possible, show other requests in httpd's error_log for the
> same timeframe -- if that was Web UI login, there would be few around
> this error.
>
> One possible problem could be what is documented in
>
> https://lists.fedorahosted.org/archives/list/freeipa-users@lists.fedorahosted.org/thread/4S4QQDC4FBVTA4GYWWVBPKGYN3MF4UJ6/#7SKWKKFFDMMFWOXPR53ZFGB634RKJHVU
> but then it would not be possible to get a Kerberos ticket in kinit as
> well. Perhaps, you have a problem with anonymous PKINIT on this host
> instead.
>
> >
> >further,
> >
> >   1. default "admin" user can IPA WebGUIlogin
> >   2. other users cannot login  IPA WebGUIlogin, but can login using cli
> >   (kinit)
> >   3. when i create a new user, the new user can login IPA WebGUI.
>
>
>
>
> --
> / Alexander Bokovoy
> Sr. Principal Software Engineer
> Security / Identity Management Engineering
> Red Hat Limited, Finland
>
>
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