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On which port do Kerberos servers (KDCs) listen for requests by default?

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  1. Port 88
  2. Port 389
  3. Port 443

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References

  1. IETF RFC 4120, The Kerberos Network Authentication Service (V5) www.rfc-editor.org/rfc/rfc4120 Checked 2026-10-10.

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