so2check

So2Check is a simple yet powerful network connectivity testing app designed for network engineers, system administrators, and developers. 【Key Features】 ■ TCP Connection Test Instantly test connections to any hostname or IP address and port number. Clearly displays connection success, failure, or timeout status, with response time measured in milliseconds. ■ Destination Management Save frequently used destinations and run tests with a single tap. Sample destinations like Google DNS and Cloudflare DNS are included so you can start testing right away. ■ Test History Automatically saves all test results. Search by name, host, port, status, or error message. Filter by success, failure, or timeout to find exactly what you need. ■ Preset Feature Save test results as presets with one tap. Organize by category to streamline your regular monitoring tasks. 【Use Cases】 ・Server and service availability monitoring ・Firewall configuration verification ・Network troubleshooting and diagnosis ・Connectivity verification for new service deployments ・Post-VPN connection testing 【Security】 All test results are encrypted and stored locally on your device. No data is ever sent to external servers. Safe for enterprise use.