GigaTap articles tagged troubleshooting.
- Silent Failures That Look Like Blocking - Some failures happen with no error at all: the server drops the client silently, and from outside that is indistinguishable from blocking. A catalogue, and why to check it first.
- Upgrades as a Source of Failure: Why It Broke Right After the Update - An upgrade changes defaults, tightens checks and relocates parameters. Four mechanisms, each of which looks exactly like blocking, and the correct order of upgrading.
- Your VPN Check Says Timeout but the Connection Works — and Vice Versa - The built-in connection check in VPN clients measures the wrong quantity. That produces two symptoms: red-but-working, and the more dangerous green-but-broken.
- Why Blocking Hits One User and Not Another - The same config behaves differently for two people, and luck has nothing to do with it. Filtering is distributed and counts per sender-destination pair, not per service.