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Why after securing LDAP communication with LDAPS there are still connections with LDAP server on port 389?

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ontap-9
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NAS
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Applies to

  • ONTAP 9
  • LDAP
  • LDAPS
  • Domain Controller Discovery (DC Discovery)

Answer

  • DC Discovery is the procedure that uses port 389 in communication with DC's while discovering LDAP servers
  • Dynamic server discovery is used by ONTAP for discovering Domain Controller's (DC's) and their associated services, such as LSA, NETLOGON, Kerberos, and LDAP
  • It discovers all the DC's, including preferred DC's, as well as all the DC's in the local site and all remote DC's  every 4 hours

Additional Information

What is Domain Controller Discovery?

 

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