← Port Encyclopedia
27

Port-27

TCP
System Low Risk
Reserved or unassigned port 27 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 27

nmap -sV -p 27 target
nmap -sV -sC --script=banner -p 27 target
nc -zv target 27

🛡️ Security Considerations

  • Scan port 27 with nmap -sV to identify the exact service and version
  • If Port-27 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-27 to find known exploits
  • Monitor traffic on port 27 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 22
SSH
Port 23
Telnet
Port 24
Port-24
Port 25
SMTP
Port 26
RSFTP
Port 28
Port-28
Port 29
Port-29
Port 30
Port-30
Port 31
Port-31
Port 32
Port-32
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