Direct answer

Problems and verification are useful for kill switches when you want to know whether the protection actually works on your setup under realistic failure conditions (for example, an abrupt VPN disconnect). The main limit is that verification cannot guarantee anonymity, safety, or access in all circumstances; it only increases confidence that your current configuration reduces exposure during specific events.

What it means in practice

A kill switch is designed to prevent traffic from leaving your device when the VPN connection is not in the expected state. “Problems” typically refer to failure modes you can observe: unexpected reconnects, partial outages, app-specific routing, or background traffic continuing during a disconnect. “Verification” means checking whether the kill switch behaves as intended on your device, with the apps you care about, and with the networks you use.

For a privacy-conscious digital nomad, this focus matters because your connectivity environment changes often (new Wi‑Fi, mobile hotspots, captive portals, power-saving modes), and kill switch behavior can differ across those conditions.

How it works (simple model)

Think of the kill switch as a gate: it blocks outbound traffic when the VPN is not active, and it allows traffic when the VPN is active and in the expected state. Verification is useful because the “not active” moment and the “block everything” scope can be imperfect in real life. Testing helps you identify whether the gate closes quickly enough and whether it covers the traffic paths your device uses (foreground apps, background sync, DNS requests).

Practical context and what to check

When testing is most useful:

  • During abrupt disconnects (turning off the VPN connection while an app is running).
  • When network conditions change (switching Wi‑Fi to mobile hotspot, reconnecting after brief outages).
  • When the device enters or exits sleep/standby.
  • With the specific apps you rely on (browsing, messaging, streaming, cloud sync).

Main limitation to keep in mind: even if a kill switch works in your tests, it may not cover every app, every protocol, or every edge case.