← Port Encyclopedia
311

Port-311

TCP
System Low Risk
Reserved or unassigned port 311 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 311

nmap -sV -p 311 target
nmap -sV -sC --script=banner -p 311 target
nc -zv target 311

🛡️ Security Considerations

  • Scan port 311 with nmap -sV to identify the exact service and version
  • If Port-311 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-311 to find known exploits
  • Monitor traffic on port 311 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 306
Port-306
Port 307
Port-307
Port 308
Port-308
Port 309
Port-309
Port 310
Port-310
Port 312
Port-312
Port 313
Port-313
Port 314
Port-314
Port 315
Port-315
Port 316
Port-316
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