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  • What are the required TCP/UCP ports for Kerberos communication?

    From Bassam Ballaji@bassam.ballaji@gmail.com to kerberos on Fri Aug 29 19:48:07 2025
    From Newsgroup: comp.protocols.kerberos

    Hello,

    My name is Bassam BALLAJI and I'm an IT professional.

    Today, I'm implementing Kerberos authentication for a business application layer access to let the users authenticate with an external active
    directory using LDAPS protocol.

    My implementation follows the article below, chapter 1, paragraph "what is Kerberos?" : https://techcommunity.microsoft.com/blog/askds/ntlm-vs-kerberos/4120658

    I need to know which TCP/ UDP ports are required for the flows 5 + 6,
    between client app and service server (not domain controller).

    Thanks in advance for your help.
    Regards,
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