← Port Encyclopedia
512

rexec

TCP
Remote Access Critical Risk
Remote execution — executes commands on remote Unix systems, cleartext auth

🔍 How to Scan Port 512

nmap -sV -p 512 target
nmap -sV -sC --script=banner -p 512 target
nc -zv target 512

🛡️ Security Considerations

  • Scan port 512 with nmap -sV to identify the exact service and version
  • If rexec is not needed, close or firewall this port immediately
  • Check for default credentials if a management interface runs on this port
  • Use searchsploit rexec to find known exploits
  • Monitor traffic on port 512 with Wireshark or tcpdump for anomalies
  • Ensure the service is patched to the latest version to prevent known CVE exploitation

🔗 Related Remote Access Ports

Port 22
SSH
Port 23
Telnet
Port 513
rlogin
Port 543
Klogin
Port 544
Kshell
Port 1494
Citrix-ICA
Port 1500
RDP-Alt
Port 2222
SSH-Alt
Port 2323
Telnet-Alt
Port 2598
Citrix-CGP
Port 3283
Apple-Remote
Port 3389
RDP

📍 Nearby Ports

Port 507
Port-507
Port 508
Port-508
Port 509
Port-509
Port 510
Port-510
Port 511
Port-511
Port 513
rlogin
Port 514
Syslog
Port 515
LPD
Port 516
Port-516
Port 517
Port-517
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