just because ping works doesnt mean your app will. learned this the hard way when ICMP was allowed but TCP 8080 was blocked. always test the actual ports
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Comments (2)
VPNveteranJan 14, 2026 5:36 PM
nc -zv is my go to for port testing
SwitchMasterJan 14, 2026 9:36 PM
telnet to port is old school but still works for quick tests
Comments (2)