[SSSD-users] Re: On CentOS v 8.1, Unable to join MS Windows Active Directory Domain running MS Windows 2003

[Sumit Bose]

On Sun, May 03, 2020 at 11:28:58AM -0000, Daniel Adeniji wrote:
>  Error Message states "KDC has no support for encryption
> type".
>  
>  Write Up Here
>  
>
> https://docs.google.com/document/d/102UCuMB5IkiPb15468EcWN8-h-t6PfRe1rq6Q...
Hi,

I guess the RHEL-8 crypto policy is overriding your settings in
/etc/krb5.conf.

Please try

    update-crypto-policies --set LEGACY

and see man update-crypto-policies for details.

HTH

bye,
Sumit

>  
>  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(a)EPHRAIMTECH.com
>  
>  Output
>  
>  
>  >KRB5_TRACE=/dev/stdout kinit -V dadeniji(a)EPHRAIMTECH.com.
>  Using default cache: 1000
>  Using principal: dadeniji(a)EPHRAIMTECH.com.
>  [2448] 1588503907.189313: Getting initial credentials for dadeniji(a)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(a)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(a)EPHRAIMTECH.COM:
>   ! Couldn't authenticate as: dadeniji(a)EPHRAIMTECH.COM: KDC has no support for
> encryption type
>  adcli: couldn't connect to ephraimtech.com domain: Couldn't authenticate as:
> dadeniji(a)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
>  ~
>  
>  
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