How can website server recognize incoming Tor or VPN connection?

1. How do websites know you are using a VPN?
2. Can websites detect Tor?
3. How to detect Tor traffic in network?
4. Can you be tracked using a VPN and Tor?

How do websites know you are using a VPN?

The IP addresses of VPN servers aren't difficult to recognize — there are even databases specializing in VPN detection, that try to determine whether an IP belongs to a particular provider. When you access a website with a VPN on, it may be able to identify that you're using a VPN using your IP.

Can websites detect Tor?

Tor Browser prevents people from knowing the websites you visit. Some entities, such as your Internet Service Provider (ISP), may be able to see that you're using Tor, but they won't know where you're going when you do.

How to detect Tor traffic in network?

Traffic from the Tor network can be detected by configuring a firewall or gateway to audit and log connections from Tor exit nodes. This can be achieved by using an up-to-date list of Tor exit nodes in a block list that has been configured in audit mode instead of enforcement mode.

Can you be tracked using a VPN and Tor?

Using a VPN is, in itself, a pretty secure method to stay anonymous on the web. So is using the Tor network, which also directs your connection through several random nodes to make it impossible to trace the connection back to you.