All ports
Port1138/UDP
encrypted_adminPort
1138
Protocol
UDP
Category
Registered
Service
encrypted_admin
What is port 1138?
Port 1138/UDP is a Registered port, registered with IANA for specific applications. It is associated with the encrypted_admin service.
encrypted admin requests
Useful commands
nmapnmap -p 1138 -sV example.comnetcatnc -zv example.com 1138curlcurl -v http://example.com:1138/telnettelnet example.com 1138bash(echo > /dev/udp/example.com/1138) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 1138/udpDeny
sudo ufw deny 1138/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 1138 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 1138 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=1138/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 1138" dir=in action=allow protocol=UDP localport=1138Security 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- Outdated versions with vulnerabilities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 1138/UDP?
Port 1138/UDP is associated with the encrypted_admin service. encrypted admin requests
Is it safe to expose port 1138 to the Internet?
It depends on the service and configuration. Port 1138 (encrypted_admin) 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 1138 is open?
You can use nmap: `nmap -p 1138 -sV example.com`, netcat: `nc -zv example.com 1138`, or the bash command: `(echo > /dev/udp/example.com/1138) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 1138 on my firewall?
On Linux with UFW: `sudo ufw allow 1138/udp` (open) or `sudo ufw deny 1138/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 1138 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 1138" dir=in action=allow protocol=UDP localport=1138`.
What applications and services use port 1138?
Port 1138/UDP is used by the encrypted_admin service. Specific uses depend on the software and configuration. Check our related tools section for more information.