What a VPN does, and what it does not
A VPN creates an encrypted tunnel between your device and a server run by the VPN provider. Websites see the provider’s server address instead of yours, and your internet provider sees only that you are connected to a VPN. That helps on public Wi-Fi, keeps your browsing private from your provider and lets you appear in another country.
A VPN does not make you anonymous to sites where you sign in, does not stop tracking through cookies and accounts, and moves your trust from your internet provider to the VPN company. Choosing a VPN is therefore mostly a decision about which company you trust with your traffic.
What to compare
| Criterion | Why it matters | What to look for |
|---|---|---|
| Privacy policy | Defines what the provider stores | Clear, short statement of what is and is not logged |
| Independent audits | Tests whether the policy holds | Recent audit by a known security firm, published in full |
| Jurisdiction | Decides which laws apply | Company location and how it handles legal requests |
| Protocols | Affect speed and security | WireGuard or OpenVPN; avoid outdated protocols |
| Server locations | Affect speed and access | Servers near you and where you need to appear |
| Apps and devices | Decide where you can use it | Apps for every device you own, router support if needed |
| Price and refunds | Decide the real cost | Renewal price, not only the first-term discount |
How to test a VPN before committing
- Use the trial or refund period
Most paid services offer one; test during your normal daily use.
- Measure speed with and without it
Run the same speed test twice, connected and disconnected, at the same time of day.
- Open the sites you use most
Banks, streaming services and shops are the most likely to block VPN addresses.
- Check for leaks
A DNS leak test page shows whether your real provider still answers your lookups while connected.
- Try the kill switch
Disconnect the VPN server on purpose and see whether your traffic stops instead of falling back to your normal connection.
When the VPN is the reason a site “is down”
A large share of the “site is down” problems that turn out to be local come from VPNs. Sites block VPN server addresses because they are shared by many users, some of them abusive. The result can be a 403 error, an endless security check, a missing catalogue or a page that never loads. The checker on the homepage runs without your VPN, so if it shows a site as reachable while the site fails for you with the VPN on, switch the VPN off or pick a server in another city before assuming an outage.
Marketing claims to ignore
Phrases such as military-grade encryption, total anonymity and unlimited everything describe nothing that sets one service apart. Every reputable VPN uses strong standard encryption. What separates them is their logging practice, their track record, the speed of their network near you and the quality of their apps. Reviews that test those things are worth more than any feature list.
When the VPN app itself will not connect
Hotel, airport and café networks often hold every connection behind a sign-in page until you accept their terms. A VPN that starts before that page has been accepted has nowhere to go, so it spins or reports a timeout. Disconnect it, open any plain website so the sign-in page appears, accept it, then reconnect.
Some networks block the protocols VPNs use. Offices, schools and certain public networks let ordinary web traffic through while dropping WireGuard or OpenVPN on their usual ports. Most VPN apps have a protocol setting, and switching from automatic to another protocol, or to a TCP-based option, often gets the tunnel up where the default fails. If nothing connects on one network but everything works on mobile data, that network is filtering VPNs, and no setting on your side changes its policy.
A connected VPN that loads nothing at all usually has a name lookup problem. The app routes your lookups to its own DNS servers, and when those stall, every site looks down even though the tunnel is up. Reconnecting to another server is the quick test. If sites still fail by name after you disconnect, your device may be holding stale answers, and the guide to clearing the DNS cache covers each operating system.
Split tunneling for sites that refuse VPN traffic
Many apps offer split tunneling, which sends chosen apps or sites outside the tunnel while everything else stays inside it. That is the practical answer to a bank or streaming service that keeps rejecting the VPN’s address: exclude that one app instead of switching the whole VPN off every time. The feature is not available in every app or on every platform, and on some phones it covers apps but not individual websites.
Kill switches and split tunneling can get in each other’s way. With a strict kill switch on, an excluded app may lose its connection whenever the VPN reconnects, which looks like the site failing at random. Test the combination once while nothing important is open.
Questions
Do I need a VPN at home?
On a trusted home network with a reputable provider, most people do not need one for safety, because nearly every site already uses encrypted connections. VPNs are more useful on public Wi-Fi, when travelling, or when you want to hide your browsing from your provider.
Can a VPN make a website look down?
Yes. Many sites block known VPN addresses or show extra checks to them. Streaming services, banks and shops are the most common. If a site fails only while the VPN is on, the block is the cause, not an outage.
Are free VPNs safe?
Some are run by reputable companies with limits on data or speed. Others pay for the service by collecting and selling data. Read the privacy policy and look for an independent audit before trusting a free VPN.
Does a VPN slow down my internet?
Usually a little, because traffic takes a longer path and is encrypted. Choosing a server close to you and a modern protocol such as WireGuard keeps the slowdown small.
What does a no-logs policy mean?
The provider says it does not store records of what you do while connected. The claim is only as good as the company behind it; independent audits and court cases where no data could be handed over are the strongest evidence.
Is using a VPN legal?
In the US, UK, Canada and Australia, using a VPN is legal. Using it to break a service's terms, such as a streaming licence, can get an account suspended. Some countries restrict or ban VPNs.