[root@rhel8 ~]# kinit administrator
Password for administrator@TEST.JP:
[root@rhel8 ~]# net ads join -U administrator
Enter administrator's password:
Using short domain name -- TEST
Joined 'RHEL8' to dns domain 'test.jp'
No DNS domain configured for rhel8. Unable to perform DNS Update.
DNS update failed: NT_STATUS_INVALID_PARAMETER
[root@rhel8 ~]# systemctl restart winbind
[root@rhel8 ~]# wbinfo -u
TEST\administrator
TEST\guest
TEST\krbtgt
TEST\chibi
[root@rhel8 ~]# wbinfo -n chibi
S-1-5-21-3470856142-1127275191-1237648751-1103 SID_USER (1)
[root@rhel8 ~]# net ads info
LDAP server: 192.168.1.28
LDAP server name: dc.test.jp
Realm: TEST.JP
Bind Path: dc=TEST,dc=JP
LDAP port: 389
Server time: 火, 10 11月 2020 05:21:08 JST
KDC server: 192.168.1.28
Server time offset: 0
Last machine account password change: 火, 10 11月 2020 05:20:00 JST
[root@rhel8 ~]# host -4 dc
dc.test.jp has address 192.168.1.28
dc.test.jp has address 192.168.1.27
dc.test.jp has IPv6 address 2400:4052:46e0:b700:dc45:79ad:c4dc:815d
dc.test.jp has IPv6 address 2400:4052:46e0:b700:b111:1a6d:f77e:194b
[root@rhel8 ~]# host -t SRV _ldap._tcp.test.jp
_ldap._tcp.test.jp has SRV record 0 100 389 dc.test.jp.
[root@rhel8 ~]# host -t SRV _kerberos._udp.test.jp
_kerberos._udp.test.jp has SRV record 0 100 88 dc.test.jp.
[root@rhel8 ~]# host -t A test.jp
test.jp has address 192.168.1.28
test.jp has address 192.168.1.27
[root@rhel8 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux release 8.3 (Ootpa)
[root@rhel8 ~]# smbd -V
Version 4.12.3
[root@rhel8 ~]# smbclient -L localhost -U%
do_connect: Connection to localhost failed (Error NT_STATUS_CONNECTION_REFUSED)
[root@rhel8 ~]# smbclient -L 192.168.1.27 -U%

        Sharename       Type      Comment
        ---------       ----      -------
SMB1 disabled -- no workgroup available
[root@rhel8 ~]# smbclient //192.168.1.27/netlogon -Uadministrator
Enter TEST\administrator's password:
Try "help" to get a list of possible commands.
smb: \> ls
  .                                   D        0  Tue Nov 10 05:01:47 2020
  ..                                  D        0  Tue Nov 10 05:01:47 2020

                124869119 blocks of size 4096. 114019226 blocks available
smb: \> exit
[root@rhel8 ~]# smbclient //192.168.1.27/sysvol -Uadministrator
Enter TEST\administrator's password:
Try "help" to get a list of possible commands.
smb: \> ls
  .                                   D        0  Tue Nov 10 05:01:47 2020
  ..                                  D        0  Tue Nov 10 05:01:47 2020
  test.jp                             D        0  Tue Nov 10 05:01:47 2020

                124869119 blocks of size 4096. 114019226 blocks available
smb: \> exit
[root@rhel8 ~]# net ads lookup
Information for Domain Controller: 192.168.1.27

Response Type: LOGON_SAM_LOGON_RESPONSE_EX
GUID: eced26ef-9f7d-4f0a-9ce8-6ff83ffcfc49
Flags:
        Is a PDC:                                   yes
        Is a GC of the forest:                      yes
        Is an LDAP server:                          yes
        Supports DS:                                yes
        Is running a KDC:                           yes
        Is running time services:                   yes
        Is the closest DC:                          yes
        Is writable:                                yes
        Has a hardware clock:                       yes
        Is a non-domain NC serviced by LDAP server: no
        Is NT6 DC that has some secrets:            no
        Is NT6 DC that has all secrets:             yes
        Runs Active Directory Web Services:         yes
        Runs on Windows 2012 or later:              yes
Forest: test.jp
Domain: test.jp
Domain Controller: dc.test.jp
Pre-Win2k Domain: TEST
Pre-Win2k Hostname: DC
Server Site Name: Default-First-Site-Name
Client Site Name: Default-First-Site-Name
NT Version: 5
LMNT Token: ffff
LM20 Token: ffff
[root@rhel8 ~]# dig test.jp

; <<>> DiG 9.11.20-RedHat-9.11.20-5.el8 <<>> test.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38474
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;test.jp.                       IN      A

;; ANSWER SECTION:
test.jp.                600     IN      A       192.168.1.27
test.jp.                600     IN      A       192.168.1.28

;; Query time: 1 msec
;; SERVER: 192.168.1.27#53(192.168.1.27)
;; WHEN: 火 11月 10 05:40:13 JST 2020
;; MSG SIZE  rcvd: 68

[root@rhel8 ~]# klist
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: administrator@TEST.JP

Valid starting       Expires              Service principal
2020-11-10T05:15:52  2020-11-10T15:15:52  krbtgt/TEST.JP@TEST.JP
        renew until 2020-11-11T05:15:45
[root@rhel8 ~]# wbinfo -t
checking the trust secret for domain TEST via RPC calls succeeded
[root@rhel8 ~]# wbinfo -g
TEST\domain computers
TEST\domain controllers
TEST\schema admins
TEST\enterprise admins
TEST\cert publishers
TEST\domain admins
TEST\domain users
TEST\domain guests
TEST\group policy creator owners
TEST\ras and ias servers
TEST\allowed rodc password replication group
TEST\denied rodc password replication group
TEST\read-only domain controllers
TEST\enterprise read-only domain controllers
TEST\cloneable domain controllers
TEST\protected users
TEST\key admins
TEST\enterprise key admins
TEST\dnsadmins
TEST\dnsupdateproxy
[root@rhel8 ~]#