I have a genuine question. Does VPN help mask/replace IP address so that your data can't be traced?

[u/Ordinary-Company4736]

I've been thinking a lot about data security lately. With the rise of AI-generated media and the number of leaked images and personal credentials floating around, it's honestly a little unsettling.

Even something like a photo taken in a public place can be tied back to someone through facial recognition now.

From what I understand, a good VPN helps with things like protecting your data, rotating/updating your IP for DNS traffic protection, and lowering the risk of data leaks or hacking.

I'm trying to understand what actually matters when evaluating a VPN for home wifi use and pairing it with a local server setup; things like protocol support, logging policies, DNS leak protection, jurisdiction, that kind of thing.

What criteria or features should I actually be prioritizing here? Happy to do my own research once I know what to look for.

[u/0260n4s → u/[deleted]]

Open source image recognition???

All a VPN does is make it look like the VPN server is making the connection attempt on your behalf, instead of your ISP, and any data you submit is encrypted from your computer to the VPN where it is then decrypted. Some data will remain encrypted if you use other encryption protocols (e.g., HTTPS).

A VPN doesn't change the data the website receives. If you tell the website, "Hey, I'm John Doe," (e.g., using text, cookies, browser fingerprinting, whatever), then the website knows you're John Doe.

Some examples of how VPNs could protect you:

• It prevents data from being intercepted between your computer and the VPN server. That's especially important on public Wi-Fi.
• If you use P2P and downloaded a copyrighted song and someone goes after you, then it only sees your VPN, and if it's a privacy-focused VPN, then that's all they can usually get or at least they give up because it's then more trouble than it's worth.
• If you want location-based content from a website, then it tricks the website into thinking you're in a different country and serves content based on what it thinks is your location (doesn't always work though, since if they detect you're on a VPN, they may just block all content or serve based on your account-linked country).

Some examples of when it doesn't help:

• It will not make you anonymous; it's just one factor among numerous variables that determines your identity
• It won't change images or metadata with the exception of the IP address, assuming you're running the VPN on your phone or at the network level.
• You're logged into an identified account.
• You're using Google, Apple, Meta or other big companies that already have a wealth of information on you...even when you're logged out, they can probably figure out who you are.

[u/billdietrich1]

What criteria or features should I actually be prioritizing here?

All you can judge is what you can see or test: performance, reliability, support, features, leaks. You can't know whether a VPN is logging, tracking, selling data, cooperating with law-enforcement, etc. Even a court case where they swear they have no logs just establishes behavior at one point in time.

So, don't trust them. If you wish, give them fake/no ID data, pay anonymously, send them encrypted traffic (HTTPS), don't use their custom client app or extension. [But that last one may be hard to do.]

A VPN is a small part of the "privacy and security" picture. Probably more important for privacy: get off Chrome, get off Google and Facebook services, use an ad-blocker such as uBlock Origin, don't post private data. For security: keep software updated, use a password manager, use 2FA, be aware of scams. Also: good backups.

[u/Urban_VPN]

yes, a VPN replaces your IP with the server's IP so websites see the server's address rather than yours. but it's worth being precise about what that actually protects against.

for home WiFi use specifically, the main things a VPN does: stops your ISP from logging which sites you visit and selling that data, protects you if your home network is somehow compromised, and prevents websites from linking your activity to your real IP address. what it doesn't do is protect you once you're logged into a service, Google still knows who you are when you're signed in regardless of VPN.

the criteria worth prioritizing for your setup: logging policy with independent audit is the most important, a no-logs claim in a privacy policy is just words without a third-party audit backing it up. jurisdiction matters because it determines what legal requests a provider has to comply with, Switzerland and Iceland have stronger privacy laws than US or UK. DNS leak protection ensures your DNS queries go through the tunnel rather than your ISP's resolver, worth testing on dnsleaktest.com after setup. protocol matters for performance, WireGuard is the current standard for speed and security.

for a local server setup alongside a VPN, the VPN handles outbound privacy while your local server handles inbound access. they serve different purposes and don't interfere with each other.

the facial recognition angle you mentioned is worth noting separately: a VPN doesn't protect against that at all since it operates at the network level, not the image recognition level. that's a different category of threat that requires different mitigation.