Yes, there are websites called VPNs (Virtual Private Networks) that allow you to connect to the internet over public Wi-Fi without your computer knowing you're doing so. VPNs work by encrypting or tunneling your data through public networks, making it appear as if you're using a private or public network. This can be useful for a variety of reasons, such as avoiding being detected by Wi-Fi managers or understanding IP addresses better.

1. Symmetric VPNs: These use a single encryption key to encrypt both the data you send and the key you receive. This makes them fast and easy to use, but they can be expensive in the long run.

2. Asymmetric VPNs: These use a pair of encryption keys—one for encrypting the data and another for decrypting it. This is slower and more expensive than symmetric VPNs but offers better security.

3. Public Proxy Server VPNs: These use a proxy server on the Internet that you can access and trust. This is useful if you want to make your VPN connections look like they're coming from a trusted source.

4. VPN Applications: These are software applications that you download and install on your computer. Examples include OpenVPN, Tor, and 2FA VPN.

5. VPN Services: These are online services that provide a range of VPN options, including public and private networks, and are often available over the web.

If you have any specific questions about VPNs or would like to discuss how they can be useful, feel free to ask!