← Port Encyclopedia
133
Port-133
TCP
System Low Risk
Reserved or unassigned port 133 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 133

nmap -sV -p 133 target
nmap -sV -sC --script=banner -p 133 target
nc -zv target 133

🛡️ Security Considerations

  • Scan port 133 with nmap -sV to identify the exact service and version
  • If Port-133 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-133 to find known exploits
  • Monitor traffic on port 133 with Wireshark or tcpdump for anomalies
  • Ensure the service is patched to the latest version to prevent known CVE exploitation

🔗 Related System Ports

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TCPMUX
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RJE
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Echo
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Discard
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systat
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Daytime
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QOTD
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Chargen
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Time
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Finger
Port 111
RPCbind
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Ident

📍 Nearby Ports

Port 128
Port-128
Port 129
Port-129
Port 130
Port-130
Port 131
Port-131
Port 132
Port-132
Port 134
Port-134
Port 135
MSRPC
Port 136
Port-136
Port 137
NetBIOS-NS
Port 138
NetBIOS-DGM
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