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Guides from the NOC

Written from running the hardware — what breaks, why, and the command that fixes it.

2 posts matching “firewall” in Troubleshooting · Clear

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Troubleshooting ERR_CONNECTION_TIMED_OUT: Causes and the Fix

Nothing answered at all. Silence means a packet was dropped rather than rejected, and that narrows the search to the firewall layers between you and the port.

31 August 2026 · 5 min · 50 views Troubleshooting ERR_CONNECTION_REFUSED: Causes and the Fix

The server answered, and the answer was no. That is a much more specific failure than a timeout, and it points at four causes rather than twenty.

31 August 2026 · 5 min · 45 views