How to Check if a Port Is Open (nc, telnet, nmap & More)
Copy-paste commands to test any port on Windows, Mac and Linux: nc, telnet, nmap, Test-NetConnection and /dev/tcp — plus how to monitor ports 24/7.
May 31, 2026
8 min read
Nginx Monitoring: Uptime, Errors, and Performance
Nginx powers a third of the web. Learn how to monitor Nginx for uptime, error rates, slow responses, and misconfigurations before users notice.
March 23, 2026
10 min read
Port Monitoring: How to Check if a Server Port is Open and Responding
TCP port monitoring catches service failures that HTTP checks miss. Learn which ports to monitor and how to alert when they stop responding.
February 22, 2026
10 min read