New subject: On CentOS v 8.1, Unable to join MS Windows Active Directory Domain running MS Windows 2003

3 May 2020


      Error Message states "KDC has no support for encryption type".
Write Up Here
https://docs.google.com/document/d/102UCuMB5IkiPb15468EcWN8-h-t6PfRe1rq6Q7x1...
Thanks,
Daniel Adeniji
=========================================================================================
Linux - Security - Active Directory
Purpose
Trying to connect a CentOS Linux box to a Microsoft Windows Active Directory Domain.
Specification
Linux
Version
uname
...
uname -r
4.18.0-147.5.1.el8_1.x86_64
lsb_release
...
sudo lsb_release -d
Description:    CentOS Linux release 8.1.1911 (Core)
Microsoft
OS Version
MS Windows 2003
TroubleShooting
kinit
Syntax
Kinit -V {username}@{domain}
Sample
KRB5_TRACE=/dev/stdout kinit -V dadeniji@EPHRAIMTECH.com
Output
...
KRB5_TRACE=/dev/stdout kinit -V dadeniji@EPHRAIMTECH.com.
Using default cache: 1000
Using principal: dadeniji@EPHRAIMTECH.com.
[2448] 1588503907.189313: Getting initial credentials for dadeniji@EPHRAIMTECH.com.
[2448] 1588503907.189315: Sending unauthenticated request
[2448] 1588503907.189316: Sending request (224 bytes) to EPHRAIMTECH.com.
[2448] 1588503907.189317: Sending DNS URI query for _kerberos.EPHRAIMTECH.com.
[2448] 1588503907.189318: No URI records found
[2448] 1588503907.189319: Sending DNS SRV query for _kerberos._udp.EPHRAIMTECH.com.
[2448] 1588503907.189320: SRV answer: 0 100 88 "harvest.ephraimtech.com."
[2448] 1588503907.189321: Sending DNS SRV query for _kerberos._tcp.EPHRAIMTECH.com.
[2448] 1588503907.189322: SRV answer: 0 100 88 "harvest.ephraimtech.com."
[2448] 1588503907.189323: Resolving hostname harvest.ephraimtech.com.
[2448] 1588503907.189324: Sending initial UDP request to dgram 10.0.4.6:88
[2448] 1588503907.189325: Received answer (104 bytes) from dgram 10.0.4.6:88
[2448] 1588503907.189326: Sending DNS URI query for _kerberos.EPHRAIMTECH.com.
[2448] 1588503907.189327: No URI records found
[2448] 1588503907.189328: Sending DNS SRV query for _kerberos-master._udp.EPHRAIMTECH.com.
[2448] 1588503907.189329: No SRV records found
[2448] 1588503907.189330: Response was not from master KDC
[2448] 1588503907.189331: Received error from KDC: -1765328370/KDC has no support for encryption type
[2448] 1588503907.189332: Retrying AS request with master KDC
[2448] 1588503907.189333: Getting initial credentials for dadeniji@EPHRAIMTECH.com.
[2448] 1588503907.189335: Sending unauthenticated request
[2448] 1588503907.189336: Sending request (224 bytes) to EPHRAIMTECH.com. (master)
[2448] 1588503907.189337: Sending DNS URI query for _kerberos.EPHRAIMTECH.com.
[2448] 1588503907.189338: No URI records found
[2448] 1588503907.189339: Sending DNS SRV query for _kerberos-master._udp.EPHRAIMTECH.com.
[2448] 1588503907.189340: Sending DNS SRV query for _kerberos-master._tcp.EPHRAIMTECH.com.
[2448] 1588503907.189341: No SRV records found
kinit: KDC has no support for encryption type while getting initial credentials
Error
Error Message
kinit: KDC has no support for encryption type while getting initial credentials
adcli
Syntax
Adcli join {domain-name} -U {username} -v
Sample
Adcli join ephraimtech.com -U dadeniji -v
Output
...
sudo adcli join ephraimtech.com -U dadeniji -v
* Using domain name: ephraimtech.com
 * Calculated computer account name from fqdn: ADRIEL
 * Calculated domain realm from name: EPHRAIMTECH.COM
 * Discovering domain controllers: _ldap._tcp.ephraimtech.com
 * Sending netlogon pings to domain controller: cldap://10.0.4.6
 * Received NetLogon info from: harvest.ephraimtech.com
 * Wrote out krb5.conf snippet to /tmp/adcli-krb5-vHcn5L/krb5.d/adcli-krb5-conf-G0KCpp
Password for dadeniji@EPHRAIMTECH.COM:
 ! Couldn't authenticate as: dadeniji@EPHRAIMTECH.COM: KDC has no support for encryption type
adcli: couldn't connect to ephraimtech.com domain: Couldn't authenticate as: dadeniji@EPHRAIMTECH.COM: KDC has no support for encryption type
Configuration
/etc/krb5.config
# To opt out of the system crypto-policies configuration of krb5, remove the
# symlink at /etc/krb5.conf.d/crypto-policies which will not be recreated.
includedir /etc/krb5.conf.d/
# Temporarily enable logging
debug_level=10
[logging]
    default = FILE:/var/log/krb5libs.log
    kdc = FILE:/var/log/krb5kdc.log
    admin_server = FILE:/var/log/kadmind.log
[libdefaults]
    dns_lookup_realm = false
    ticket_lifetime = 24h
    renew_lifetime = 7d
    forwardable = true
    rdns = false
    pkinit_anchors = FILE:/etc/pki/tls/certs/ca-bundle.crt
    spake_preauth_groups = edwards25519
    default_ccache_name = KEYRING:persistent:%{uid}
    default_tgs_enctypes = rc4-hmac des-cbc-crc des-cbc-md5
    defaukt_tkt_enctypes = rc4-hmac des-cbc-crc des-cbc-md5
    permitted_enctypes = rc4-hmac des-cbc-crc des-cbc-md5
    allow_weak_crypto = true
    dns_lookup_kdc = true
[realms]
# EXAMPLE.COM = {
#     kdc = kerberos.example.com
#     admin_server = kerberos.example.com
# }
[domain_realm]
# .example.com = EXAMPLE.COM
# example.com = EXAMPLE.COM
~