Scanner de Ports (TCP/UDP)
Vérifiez les ports ouverts sur n'importe quelle adresse IP ou domaine
Scanner les Ports
Vérifiez les ports TCP ouverts sur un domaine ou une adresse IP.
What is an Online Port Scanner?
A Port Scanner is a network diagnostic tool used to check which TCP or UDP ports are open on a server, computer, or internet-connected device. Each network service (such as websites, email, or databases) uses a specific "port" to communicate.
Why check for open ports?
Checking for open ports is a crucial part of **cybersecurity** and systems administration. Professionals use scans for:
- Security Auditing: Identifying unnecessarily exposed services that could be attack vectors.
- Troubleshooting: Confirming if a service (like a web server on port 80 or 443) is accessible from the outside.
- Firewall Validation: Ensuring firewall rules are correctly blocking or allowing traffic.
Understanding Status: Open, Closed, and Filtered
- Open: The device is accepting connections on this port. A service is listening.
- Closed: The device responded, but indicated no active service on this port.
- Filtered: No response within the timeout. Usually means a firewall is dropping the packets.
Safety and Compliance
The Octovelo Port Scanner uses a secure backend to perform direct connection tests. Only use this tool on your own servers or addresses you have explicit permission to audit.