All ports
Port2873/UDP
psrtPort
2873
Protocol
UDP
Category
Registered
Service
psrt
What is port 2873?
Port 2873/UDP is a Registered port, registered with IANA for specific applications. It is associated with the psrt service.
PubSub Realtime Telemetry Protocol
Useful commands
nmapnmap -p 2873 -sV example.comnetcatnc -zv example.com 2873curlcurl -v http://example.com:2873/telnettelnet example.com 2873bash(echo > /dev/udp/example.com/2873) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 2873/udpDeny
sudo ufw deny 2873/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 2873 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 2873 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=2873/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 2873" dir=in action=allow protocol=UDP localport=2873Security Risks
- Unauthorized access to the service
- Data exposure if the service is unauthenticated
- Outdated versions with vulnerabilities
- Incorrect service configuration
Frequently Asked Questions
What service runs on port 2873/UDP?
Port 2873/UDP is associated with the psrt service. PubSub Realtime Telemetry Protocol
Is it safe to expose port 2873 to the Internet?
It depends on the service and configuration. Port 2873 (psrt) is a Registered port. If you need to expose it, keep the service updated, use strong authentication, and configure a firewall. It's always recommended to restrict access by IP when possible.
How do I check if port 2873 is open?
You can use nmap: `nmap -p 2873 -sV example.com`, netcat: `nc -zv example.com 2873`, or the bash command: `(echo > /dev/udp/example.com/2873) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 2873 on my firewall?
On Linux with UFW: `sudo ufw allow 2873/udp` (open) or `sudo ufw deny 2873/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 2873 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 2873" dir=in action=allow protocol=UDP localport=2873`.
What applications and services use port 2873?
Port 2873/UDP is used by the psrt service. Specific uses depend on the software and configuration. Check our related tools section for more information.