All ports
Port4011/UDP
altservicebootPort
4011
Protocol
UDP
Category
Registered
Service
altserviceboot
What is port 4011?
Port 4011/UDP is a Registered port, registered with IANA for specific applications. It is associated with the altserviceboot service.
Alternate Service Boot
Useful commands
nmapnmap -p 4011 -sV example.comnetcatnc -zv example.com 4011curlcurl -v http://example.com:4011/telnettelnet example.com 4011bash(echo > /dev/udp/example.com/4011) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4011/udpDeny
sudo ufw deny 4011/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 4011 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 4011 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4011/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4011" dir=in action=allow protocol=UDP localport=4011Security 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- Outdated versions with vulnerabilities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 4011/UDP?
Port 4011/UDP is associated with the altserviceboot service. Alternate Service Boot
Is it safe to expose port 4011 to the Internet?
It depends on the service and configuration. Port 4011 (altserviceboot) 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 4011 is open?
You can use nmap: `nmap -p 4011 -sV example.com`, netcat: `nc -zv example.com 4011`, or the bash command: `(echo > /dev/udp/example.com/4011) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4011 on my firewall?
On Linux with UFW: `sudo ufw allow 4011/udp` (open) or `sudo ufw deny 4011/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 4011 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4011" dir=in action=allow protocol=UDP localport=4011`.
What applications and services use port 4011?
Port 4011/UDP is used by the altserviceboot service. Specific uses depend on the software and configuration. Check our related tools section for more information.