H.Wfp

H.Vpn

A set of C# libraries for VPN implementation

Features

• Supports firewall that will block the internet if there are connection problems.
• Based on OpenVPN

Nuget

Usage

H.Firewall

Forbids for 15 seconds everything except LAN/DNS/Localhost requests and Chrome applications.
NOTE: To use this code in your application, you must either run it as an administrator or run it through a service talking to it via IPC (eg H.Pipes). Else you will get the following error: 0x8032000D. The call must be made from within an explicit transaction.

using var firewall = new HFirewall();

firewall.Start();
firewall.RunTransaction(ptr =>
{
    var (providerKey, subLayerKey) = firewall.RegisterKeys();
    firewall.PermitAppId(
        providerKey,
        subLayerKey,
        @"C:\Users\haven\AppData\Local\Google\Chrome\Application\chrome.exe",
        15);

    firewall.PermitLan(providerKey, subLayerKey, 12);
    firewall.PermitDns(providerKey, subLayerKey, 11, 10);
    firewall.PermitLocalhost(providerKey, subLayerKey, 1);

    // Block everything not allowed explicitly
    firewall.BlockAll(providerKey, subLayerKey, 0);
});

await Task.Delay(TimeSpan.FromSeconds(15));

H.Firewall uses WFP calls internally, you can learn more about this.

Usage

Contacts

• mail