Inspect exposed services with targeted port ranges.
Verify with permission. Flag unexpected open services.
This page checks whether selected TCP ports appear reachable from the server running the tool. The interface stays intact, while the supporting content explains an important limitation: port visibility depends on the observation point, firewalls, NAT, and current network policy.
Enter a target host or IP, choose a port range or profile, and optionally label the check for your own process. The result summarizes what the probe could reach, not every possible path that exists on the Internet.
The tool attempts targeted connection checks against the requested ports and reports what appears open or filtered from that source. It is a service exposure test, not a full vulnerability assessment.
Scan a web host with a profile such as common services. If ports 80 and 443 appear open but an application issue remains, the result tells you the network path is at least permitting connection attempts. It does not prove the application layer is healthy.
Use open port checks to validate firewall changes, confirm intended exposure, troubleshoot reachability, and identify unexpected services.
Open port, ping, and traceroute tests can all be affected by firewalls, routing policy, NAT, and rate limits. Results are informational estimates from one observation point. Only test hosts you are authorized to assess.
It shows whether selected TCP ports appear reachable from the observation point running the test and summarizes likely exposed services.
No. A port can accept connections while the application behind it is degraded, misconfigured, or restricted after connection.
Yes. Firewalls, routing policy, NAT, load balancers, and rate limits can make ports appear closed, filtered, or inconsistent from different locations.
It is useful for validating change windows, confirming service exposure, checking firewall updates, and spotting unintended reachable ports.
Yes. Only test systems you own or are authorized to assess.
The output is informational and reflects what the probing system can reach at that moment. Different networks can see different exposure.
Check basic reachability before testing specific services.
Map the path when a port is unreachable from this probe source.
Add risk context when an exposed service looks suspicious.