All ports
Port4621/TCP
Port
4621
Protocol
TCP
Category
Registered
Service
Unassigned
What is port 4621?
Port 4621/TCP is a Registered port, registered with IANA for specific applications. It currently has no assigned service in the IANA registry.
Reserved
Useful commands
nmapnmap -p 4621 -sV example.comnetcatnc -zv example.com 4621curlcurl -v http://example.com:4621/telnettelnet example.com 4621bash(echo > /dev/tcp/example.com/4621) 2>/dev/nullFirewall commands
UFWAllow
sudo ufw allow 4621/tcpDeny
sudo ufw deny 4621/tcpiptablesAllow
sudo iptables -A INPUT -p tcp --dport 4621 -j ACCEPTDeny
sudo iptables -D INPUT -p tcp --dport 4621 -j ACCEPTfirewalldAllow
sudo firewall-cmd --permanent --add-port=4621/tcpWindowsAllow
netsh advfirewall firewall add rule name="Open Port 4621" dir=in action=allow protocol=TCP localport=4621Security 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- Outdated versions with vulnerabilities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 4621/TCP?
Port 4621/TCP is associated with the Unassigned service. Reserved
Is it safe to expose port 4621 to the Internet?
It depends on the service and configuration. Port 4621 (Unassigned) 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 4621 is open?
You can use nmap: `nmap -p 4621 -sV example.com`, netcat: `nc -zv example.com 4621`, or the bash command: `(echo > /dev/tcp/example.com/4621) 2>/dev/null && echo "Open" || echo "Closed"`.
How do I open or close port 4621 on my firewall?
On Linux with UFW: `sudo ufw allow 4621/tcp` (open) or `sudo ufw deny 4621/tcp` (close). With iptables: `sudo iptables -A INPUT -p tcp --dport 4621 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 4621" dir=in action=allow protocol=TCP localport=4621`.
What applications and services use port 4621?
Port 4621/TCP is used by the Unassigned service. Specific uses depend on the software and configuration. Check our related tools section for more information.