← Port Encyclopedia
873
rsync
TCP
File Transfer
High Risk
rsync — file synchronization, unauthenticated access if misconfigured
🔍 How to Scan Port 873
nmap -sV -p 873 target
nmap -sV -sC --script=banner -p 873 target
nc -zv target 873
🛡️ Security Considerations
- Scan port 873 with
nmap -sVto identify the exact service and version - If rsync is not needed, close or firewall this port immediately
- Check for default credentials if a management interface runs on this port
- Use
searchsploit rsyncto find known exploits - Monitor traffic on port 873 with Wireshark or tcpdump for anomalies
- Ensure the service is patched to the latest version to prevent known CVE exploitation