Port 873 — rsync

TCP · Port 873/TCP is used for the rsync service, a popular utility for synchronizing files between systems. This port is critical in network security as it allows administrators to securely transfer and manage data across networks.

Port Number: 873
Service Name: rsync
Protocol: TCP
Common Software: rsync

Security Notes

Review IANA registry for port 873 usage. Apply principle of least privilege - only open ports that are required.

FAQ

What is port 873 used for?

Port 873 is used for rsync. Port 873/TCP is used for the rsync service, a popular utility for synchronizing files between systems. This port is critical in network security as it allows administrators to securely transfer and manage data across networks. Common software: rsync.

Is port 873 dangerous to leave open?

Review IANA registry for port 873 usage. Apply principle of least privilege - only open ports that are required.

How do I check if port 873 is open?

Use nmap: nmap -p 873 <target> or check locally: ss -tlnp | rg 873