How websites know that you use a VPN, and which VPN service adds more IP addresses often?

VPN
1

How websites know that you use a VPN, and which VPN service adds more IP addresses often ?
hello, I guess that websites owners can list the VPN IP address to stop them ?
but if a VPN service changes it’s IP addresses often, then VPN cannot be stopped anymore ?
or is there a way for websites owners to ALWAYS know that someone uses a VPN ?
can you help me understand please ?
And do you know also why reddit stops people from posting when using a VPN ?
thanks a lot !

I tried to post the question there but I don’t know why it was deleted ? sorry if I am wrong

https://www.reddit.com/r/VPN/comments/vacs45/how\_websites\_know\_that\_you\_use\_a\_vpn\_and\_which/

2

Via lists of exit nodes and IP address ranges owned by vpn companies

3

Strictly speaking a website cannot simply just “detect” if your connection is coming from a VPN. As you mentioned one of the ways websites can detect VPN usages is by the IP address. Primarily websites and services have an array of factors they test to best determine if your connection is coming from a shared use VPN or proxy.

One way that a service or website can detect your VPN usage is via DNS leakage or IPv6 leakage as these services can deliver contradicting IP / Location information.

In addition website can use cookies and beacons to detect if you have previously connect via a different IP address and if there is enough difference such as changing country in a short span of time website may flag the IP address as a shared usage / VPN address.

While there are additional ways to detect such as whitelisted and blacklisted IP addresses I am unable to provide an exhaustive list of these methods.

As for your other question regarding Reddit blocking posts from VPN connections it may be bot / spam detection tripping. I personally have a few VPN clients running on my router and my connection is always routed through them and I don’t have any issues posting to Reddit.

4

I think the question is why would a website want to block VPN users?

5

thanks a lot !

reddit limits comments of anybody with a vpn

6

online gambling isn’t legal in every state.

7

I don’t think this is true.

8

I always use VPN (PIA lately) when travelling, and I have never had an issue with Reddit.

With google search - yes (keep on getting captcha and then timed out).

With financial/banks - yes (I have to make sure to choose a server close to home).

9

I understand that to a point. We get our netflix through Tmobile family plan, so 6 phones are spread out across the US. Netflix limits us to a certain number of concurrent streams. While I understand where they’d want to limit who has access on an account (friends, friends of friends, friends of those friend, etc.), I also feel that if they limit an account to say 4 streams at a time, then what’s it matter who’s using those streams (as far as I know only family members are using our streams). I see it from both sides though. They view it as lost revenue. But they also can ID a device using there service regardless of IP address. Each computer/roku/etc. has unique identifiers and I’m sure there software can detect them.

I know I went a little off topic, but thank you for pointing out why a website would want to prevent a VPN. They’d want to if they want to limit to a single users with a static IP. I guess I just wanted to know why and what types of websites would want to do that. You made a valid answer. I was thinking along the lines of forums, etc. that require a log on. Why would a discussion website want to? Why would Reddit want to?