← Port Encyclopedia
88

Kerberos

TCP/UDP
Authentication Critical Risk
Kerberos authentication — Active Directory, ticket-granting, Kerberoasting attacks

🔍 How to Scan Port 88

nmap -sV -p 88 target
nmap -sV -sC --script=banner -p 88 target
nc -zv target 88

🛡️ Security Considerations

  • Scan port 88 with nmap -sV to identify the exact service and version
  • If Kerberos is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit kerberos to find known exploits
  • Monitor traffic on port 88 with Wireshark or tcpdump for anomalies
  • Ensure the service is patched to the latest version to prevent known CVE exploitation

🔗 Related Authentication Ports

Port 49
TACACS
Port 464
Kerberos-Change
Port 749
Kerberos-Admin
Port 1812
RADIUS
Port 1813
RADIUS-Acct
Port 3868
Diameter
Port 9595
PingFederate

📍 Nearby Ports

Port 83
HTTP-Alt
Port 84
HTTP-Alt
Port 85
Port-85
Port 86
Port-86
Port 87
Port-87
Port 89
Port-89
Port 90
Port-90
Port 91
Port-91
Port 92
Port-92
Port 93
Port-93
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