Direct answer
When diagnosing or configuring a VPN connection in hotels and airports, focus on operating conditions (Wi‑Fi network rules, captive portals, device settings) and on the main limitation: a VPN doesn’t guarantee anonymity, safety, or consistent access. Treat performance and reachability as variable, then verify with practical tests before you depend on the connection.
What it means in practice
Hotels and airports often use Wi‑Fi networks that apply network-level restrictions. That can affect whether VPN handshakes complete, whether certain protocols are allowed, and whether you need to sign in through a captive portal first. Your goal is to make your VPN setup resilient to these differences across locations and times, while keeping expectations realistic.
How it works (a simple model)
A VPN client creates an encrypted tunnel between your device and the VPN service. Your device then routes eligible traffic through that tunnel. In travel settings, the key decision is whether the VPN protocol and transport are likely to connect on that particular network and whether your device can reach the VPN server after Wi‑Fi restrictions and sign-in steps are applied.
Main limitations to keep in mind
A VPN does not guarantee anonymity, safety, or guaranteed access to websites or services. Performance and availability can vary by network, device, location, provider, and time. Also, some networks may block or rate-limit common VPN behaviors, which can make troubleshooting necessary.
What to check and verify (practical steps)
Start with your basics: confirm you can reach the internet without the VPN, then enable the VPN and check whether the connection establishes successfully. If it fails, try a different VPN protocol/transport option available in your client (if your setup supports it), and repeat the test. If the Wi‑Fi requires a captive portal, complete the sign-in before concluding the VPN is the issue. Rebooting the device’s Wi‑Fi, switching networks (when possible), and retesting can help isolate whether the problem is the local network or the VPN client configuration.
Consider keeping notes on what changed (network name, time, protocol option, and whether captive portal sign-in was required).