// REFERENCE
Port 88 (Kerberos)
Protocol: TCP/UDP
Service: Kerberos
Medium risk
Kerberos: ticket-based authentication, the heart of Active Directory. Seeing it open flags a Domain Controller. It's a target for Kerberoasting and AS-REP roasting.
Related tools
Work with this in:
Related
53
Port 53 (DNS) 389
Port 389 (LDAP) 636
Port 636 (LDAPS) 43
Port 43 (WHOIS) 853
Port 853 (DNS over TLS) 3268
Port 3268 (AD Global Catalog)
Port 53 (DNS) 389
Port 389 (LDAP) 636
Port 636 (LDAPS) 43
Port 43 (WHOIS) 853
Port 853 (DNS over TLS) 3268
Port 3268 (AD Global Catalog)
Assignments per the IANA port registry. Educational content.