Why do VPN links damage when I rest my computer system?
I assume Bob Somers struck the solution, yet there is an additional opportunity. You can be resting your computer system via the rekey period, which damages the link.
VPNs bargain a session key for every single link. This key obtains "stagnant" eventually, and also might be at risk to strike if adequate information has actually been passed with it. To keep the security of the VPN network, there is a rekey period where both finishes instantly renegotiate a fresh session key. This is generally clear to both sides of the passage, thinking both sides are attached. When you place your computer system to rest, it is feasible the rekey period is up throughout that time, and also the VPN host shuts the link due to the fact that it can not renegotiate the session key.
I'm not specifically certain yet my hunch is due to the fact that the network card (NIC) has actually been separated from the os pile. The reality that a VPN link continues to be open is not a lot hardware relevant yet extra by the software program layers (reflect to your 7 layer style).
Bingo. The majority of VPN software program is applied making use of the TCP/IP pile, which is not stateless. They have actually timeouts related to the links and also when you place your computer system to rest there's no other way to maintain that link active.