![]() ![]() But that implies that your tethering app has to be capable to tether through VPN and that you actually have VPN server somewhere out there to connect to. The only way I can think of is setting up a VPN connection on your phone and then tethering your laptop "through" that VPN connection. Therefor they can assume that there must be something going on at your end. So when they are looking at the TTL of the packet they can see that it has decreased by 1 second they cannot account for. Your provider can obviously check the time it takes for a packet from your phone to their server (which is usually milliseconds). Basically every packet has a TTL and every time a packet hits a "hop" (usually a router or routing point) the TTL is decreased by the time passed but at least by one. Some applications out there actually use the built-in tethering and just give you a different interface to it.Īnother hint towards tethering is the Time To Live of the packets sent. The same applies to third-party applications. They may be different from provider to provider and not all of them might be known or can be worked around.įor example the phones built-in tethering usually asks the network if tethering is allowed or it does send an information packet that you are currently tethering. There are various methods how tethering can be detected. ![]()
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