Use realistic expectations about “privacy” and IP visibility
A VPN’s core value is that it changes how your traffic is routed and can change which IP address is visible to the websites or services you connect to. However, it does not guarantee anonymity, safety, or universal access. Your overall privacy still depends on what websites and apps collect, how your device behaves, and whether other identifiers (such as accounts, browser data, or cookies) remain present.
How operation affects what you can observe
In practice, “IP addresses and privacy: concepts and operation” means you should expect different results depending on where you test, which protocol is used, and whether DNS lookups and application traffic are going through the tunnel. Some connectivity problems also look like “privacy problems” because traffic may bypass the VPN during setup, after sleep/wake, or when certain apps route differently.
Limitations to watch for during configuration and troubleshooting
The biggest limitations are practical rather than theoretical: performance and availability vary by network, device, location, provider routing, and time. Also, claims about current product behavior, legal compliance, or measured outcomes require up-to-date verification rather than assumption. Finally, encryption does not automatically prevent metadata exposure such as which endpoints you connect to, and it cannot stop tracking that relies on accounts or browser/device identifiers.
Practical verification steps (and common failure signals)
Confirm behavior with more than one check: compare IP-visible results before and during the VPN session, verify DNS behavior at the time of connection, and test the specific apps/services you care about. If traffic seems inconsistent, check for “tunnel not active” situations, connectivity changes after network switching, and whether apps are configured to use the VPN. Treat any unexpected leaks, timeouts, or location inconsistencies as signals to re-check settings and retest across multiple scenarios.