← Port Encyclopedia
181
Port-181
TCP
System Low Risk
Reserved or unassigned port 181 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 181

nmap -sV -p 181 target
nmap -sV -sC --script=banner -p 181 target
nc -zv target 181

🛡️ Security Considerations

  • Scan port 181 with nmap -sV to identify the exact service and version
  • If Port-181 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-181 to find known exploits
  • Monitor traffic on port 181 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 176
Port-176
Port 177
Port-177
Port 178
Port-178
Port 179
BGP
Port 180
Port-180
Port 182
Port-182
Port 183
Port-183
Port 184
Port-184
Port 185
Port-185
Port 186
Port-186
📚 Learn Network Scanning — Free Course