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Cake day: June 12th, 2023

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  • The addAddress call may just be configuring the local side of the VPN. It’s hard to know without looking at the rest of the code.
    The general workflow when establishing a VPN connection is:

    • open a socket to the destination VPN service (ProtonVPN, or whatever suspect service).
    • configure parameters such as DNS, split tunneling, and which networks to route over the VPN (generally everything from your local system, except the VPN connection itself).
    • update the local routing so traffic starts flowing over the VPN.

    addAddress may just be part of the configuration. A very cursory search suggests that OpenVPN may be being used as the underlying VPN implementation framework (not uncommon).