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bail3yz

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If I have software on someones computer is it possible for me to detect if they are on using a VPN?

If the VPN is set up so it never uses the normal connection.. ie so if the vpn disconnects software on the computer wont reconnect using the regular connection.

Is it possible for software on the computer to see the other connections and to know its currently running on a VPN?

I imagine if it is.. there are ways to hide it?.. one way would be to set up the VPN on a router or something else.. and have the computer connected to that... so the computer doesnt even know its using a VPN?

Also is there anyway to tell if an IP is coming from a VPN?  if I was running a website and I could see the IPs connected to me..is there any way to tell if any of the IPs are from a VPN?


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Mechanic_Kharkov
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Hello, Your question does not seem to be obvious enough.
Can You be a bit specific?
E.g. What kind of software the opposite side uses, client or server? On which side of connection do you need to know about VPN is active, local or remote?
For what exactly do you want to know VPN is in use? Is the connection inaccessibility after the VPN goes down the main trouble, or something else.
And of course, are the VPN server and its client both under your control?

If I understood your configuration right, and some host has some software that works correctly only when VPN connection is active, then there is a simple way to see it's active: just ping another side of a VPN connection. It must be the VPN tunnel server's endpoint IP. If another connection is active but not the VPN, and outgoing traffic is routed thru that another interface, then of course, the VPN's interface internal addresses would be unreachable.
If your VPN tunnel has fixed local IP, you can ping this local one too.
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bail3yz

ASKER

I am running a client software on my computer and I want to HIDE that I am using a VPN.. I dont want them to know that I am using a VPN...
So I want the VPN set up so the software never connects via my regular IP if the VPN goes down..
So I am wondering if they can add something to their software to notify them if I am on a VPN?

which is also why I am also wondering if they can tell its a VPN IP from their side
ASKER CERTIFIED SOLUTION
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Dave Howe
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