All ports
Port5767/UDP
s-openmailPort
5767
Protocol
UDP
Category
Registered
Service
s-openmail
What is port 5767?
Port 5767/UDP is a Registered port, registered with IANA for specific applications. It is associated with the s-openmail service.
OpenMail Suer Agent Layer (Secure)
Useful commands
nmapnmap -p 5767 -sV example.comnetcatnc -zv example.com 5767curlcurl -v http://example.com:5767/telnettelnet example.com 5767bash(echo > /dev/udp/example.com/5767) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 5767/udpDeny
sudo ufw deny 5767/udpiptablesAllow
sudo iptables -A INPUT -p udp --dport 5767 -j ACCEPTDeny
sudo iptables -D INPUT -p udp --dport 5767 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=5767/udpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 5767" dir=in action=allow protocol=UDP localport=5767Security Risks
- Open relay used for spam
- Email spoofing
- Brute force attacks against email accounts
- Information disclosure in email headers
Frequently Asked Questions
What service runs on port 5767/UDP?
Port 5767/UDP is associated with the s-openmail service. OpenMail Suer Agent Layer (Secure)
Is it safe to expose port 5767 to the Internet?
It depends on the service and configuration. Port 5767 (s-openmail) 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 5767 is open?
You can use nmap: `nmap -p 5767 -sV example.com`, netcat: `nc -zv example.com 5767`, or the bash command: `(echo > /dev/udp/example.com/5767) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 5767 on my firewall?
On Linux with UFW: `sudo ufw allow 5767/udp` (open) or `sudo ufw deny 5767/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 5767 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 5767" dir=in action=allow protocol=UDP localport=5767`.
What applications and services use port 5767?
Port 5767/UDP is used by the s-openmail service. Specific uses depend on the software and configuration. Check our related tools section for more information.