Port 873 · rsync

Port 873 is rsync, TCP.

rsync daemon — efficient file synchronisation and transfer. Runs unencrypted; use rsync over SSH for secure transfers.

Palo Alto

Create the service object for this port, then allow the App-ID on it. Restricting the rule to the port's service object keeps the rule working on a non-default port and stops the App-ID matching on other ports. Replace the placeholders with your own rule name and zones.

set service tcp-873 protocol tcp port 873

set rulebase security rules <rule-name> from <from-zone> to <to-zone> source any destination any application rsync service tcp-873 action allow

Risk and exposure

Rated medium risk. Restrict this port to the sources that need it and keep the service patched; avoid exposing it to the whole internet unless the service is meant to be public.

Check it

• Linux ss -tlnp | grep :873
• PowerShell Test-NetConnection <host> -Port 873
• nmap nmap -p 873 <host>

Related ports

• 20 FTP Data
• 21 FTP Control
• 111 RPC Portmapper
• 123 NTP
• 143 IMAP
• 990 FTPS

← Search all ports