Description
The port-checker-tool script helps administrators verify the accessibility of one or more ports on a local or remote system. It functions by attempting to initiate a TCP (or UDP, if supported) connection to the specified port and host, and records whether the connection is successful, refused, or timed out.
This script is commonly used in troubleshooting network services, such as web servers (port 80/443), mail servers (25, 587), VPN services (1194, 500), or custom application ports. It’s especially useful in diagnosing issues related to firewalls, NAT, port forwarding, and service misconfiguration.
Entries are logged with timestamp, IP/hostname, port number, result, and response time. For routine checks, the script can be automated and integrated with alerting systems to flag when services go offline or become unreachable.
Some versions also include banner grabbing or service detection to validate whether the correct service is responding on the port. It’s a lightweight but powerful tool that belongs in any network troubleshooting toolkit.
Oluwaseyi –
“This port-checker-tool is a fantastic, simple utility that’s proven invaluable for troubleshooting network issues. I especially appreciate the ability to check remote targets and the included timeout/retry logic which makes it more reliable. The logging is clear and concise, and the tool has already helped me pinpoint several problems. It’s a solid piece of software that’s exceeded my expectations.”
Basirat –
“This port checker tool is incredibly useful! It’s straightforward to use and quickly helps me determine if services are running and listening on the correct ports, both locally and remotely. The inclusion of timeout and retry features ensures reliable results, and the logging provides valuable information for troubleshooting. A fantastic addition to my diagnostic toolkit!”
Ayobami –
“This port-checker-tool has been incredibly useful for troubleshooting network issues. The ability to quickly test port availability on both local and remote servers, with built-in timeout and retry logic, has saved me a significant amount of time. The logging feature is also a great addition for monitoring port status and latency. A fantastic utility that’s easy to use and very effective.”
Yusif –
“This port-checker-tool is incredibly useful! It quickly and efficiently identifies open ports, both locally and remotely, making troubleshooting network issues a breeze. The timeout and retry features are particularly helpful, and the logging provides a clear picture of port status and latency. It’s a fantastic resource for anyone needing to monitor service availability.”