All ports
Port222/UDP
rsh-spxPort
222
Protocol
UDP
Category
Well-Known
Service
rsh-spx
What is port 222?
Port 222/UDP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the rsh-spx service.
Berkeley rshd with SPX auth
Useful commands
nmapnmap -p 222 -sV example.comnetcatnc -zv example.com 222curlcurl -v http://example.com:222/telnettelnet example.com 222bash(echo > /dev/udp/example.com/222) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 222/udpDeny
sudo ufw deny 222/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 222 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 222 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=222/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 222" dir=in action=allow protocol=UDP localport=222Security 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- Outdated versions with vulnerabilities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 222/UDP?
Port 222/UDP is associated with the rsh-spx service. Berkeley rshd with SPX auth
Is it safe to expose port 222 to the Internet?
It depends on the service and configuration. Port 222 (rsh-spx) is a Well-Known 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 222 is open?
You can use nmap: `nmap -p 222 -sV example.com`, netcat: `nc -zv example.com 222`, or the bash command: `(echo > /dev/udp/example.com/222) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 222 on my firewall?
On Linux with UFW: `sudo ufw allow 222/udp` (open) or `sudo ufw deny 222/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 222 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 222" dir=in action=allow protocol=UDP localport=222`.
What applications and services use port 222?
Port 222/UDP is used by the rsh-spx service. Specific uses depend on the software and configuration. Check our related tools section for more information.