← Port Encyclopedia
89

Port-89

TCP
System Low Risk
Reserved or unassigned port 89 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 89

nmap -sV -p 89 target
nmap -sV -sC --script=banner -p 89 target
nc -zv target 89

🛡️ Security Considerations

  • Scan port 89 with nmap -sV to identify the exact service and version
  • If Port-89 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-89 to find known exploits
  • Monitor traffic on port 89 with Wireshark or tcpdump for anomalies
  • Ensure the service is patched to the latest version to prevent known CVE exploitation

🔗 Related System Ports

Port 1
TCPMUX
Port 5
RJE
Port 7
Echo
Port 9
Discard
Port 11
systat
Port 13
Daytime
Port 17
QOTD
Port 19
Chargen
Port 37
Time
Port 79
Finger
Port 111
RPCbind
Port 113
Ident

📍 Nearby Ports

Port 84
HTTP-Alt
Port 85
Port-85
Port 86
Port-86
Port 87
Port-87
Port 88
Kerberos
Port 90
Port-90
Port 91
Port-91
Port 92
Port-92
Port 93
Port-93
Port 94
Port-94
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