← Port Encyclopedia
517

Port-517

TCP
System Low Risk
Reserved or unassigned port 517 — may appear in network scans as open, closed, or filtered

🔍 How to Scan Port 517

nmap -sV -p 517 target
nmap -sV -sC --script=banner -p 517 target
nc -zv target 517

🛡️ Security Considerations

  • Scan port 517 with nmap -sV to identify the exact service and version
  • If Port-517 is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit port-517 to find known exploits
  • Monitor traffic on port 517 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 512
rexec
Port 513
rlogin
Port 514
Syslog
Port 515
LPD
Port 516
Port-516
Port 518
Port-518
Port 519
Port-519
Port 520
RIP
Port 521
RIPng
Port 522
Port-522
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