Direct answer: the main risks and limitations

If you’re diagnosing or configuring a VPN connection on a home network, the biggest risks are expecting “automatic” privacy, safety, or access guarantees. In practice, VPN behavior depends on operating conditions (your router/network, device settings, chosen VPN settings, and the remote network/provider side). Performance can also vary, and some outcomes you want (like reaching a specific service) may fail despite a “connected” status.

How it works (and why outcomes vary)

A home VPN setup typically changes how your device routes traffic: after the VPN tunnel is established, relevant traffic goes through the VPN connection. What “relevant traffic” means depends on the client’s configuration (for example, which destinations are routed through the VPN). If DNS and routing settings don’t match your expectation, you can see partial protection (some traffic goes elsewhere) or confusing diagnostics (traffic appears to behave “normally” while other parts don’t).

Practical context: what can go wrong at home

Realistic scenarios include:

  1. The tunnel connects, but specific apps still fail because they use different network paths or cached data.
  2. A router feature, firewall rule, or IPv6 behavior bypasses parts of traffic, creating inconsistent results.
  3. Local network policies (guest Wi‑Fi, parental controls, segmenting) affect what devices can reach.
  4. Travel or location changes trigger different routing, latency, or availability patterns.

Limitations to keep in mind

A VPN does not guarantee anonymity, safety, or access. Your actual privacy and security outcomes depend on threat model, endpoint security (your device), update level, and how the VPN client handles leaks during disconnects. Also, performance and availability vary by network, device, location, provider, and time. Finally, any current product, legal, or empirical claims about features or capabilities should be treated as conditional unless verified from up-to-date, authoritative information.

Verification steps you can do without assumptions

Use a staged approach:

  • Confirm the VPN client state is truly connected and stable (not just “attempting”). - Check local DNS behavior: verify whether DNS queries are going through the VPN or using local resolvers, based on your client/router settings.