WinDivert ignore tor traffic

  • 8 months ago
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WinDivert is a Windows packet capturing and modifying library, often used for implementing network filters, firewalls, and other network-related applications. If you want to ignore Tor traffic using WinDivert, you can follow these general steps:

  1. Identify Tor Traffic:
    Tor traffic often uses specific ports and protocols. You can identify Tor traffic by looking at its destination port and protocol. Tor traffic generally uses TCP or UDP on ports 9001 and 9030. However, these ports can change due to network configurations and updates.

  2. Filtering Rules:
    WinDivert allows you to create filtering rules using the WinDivertOpen function. You can set up rules to capture or drop packets based on specific conditions.

  3. Writing a Filtering Driver:
    To ignore Tor traffic, you'll need to write a filtering driver using WinDivert. You'll need to implement the logic to identify and filter out the Tor traffic based on its characteristics.

    Here's a simple example of how you might use WinDivert to drop Tor traffic:

    c
    HANDLE handle = WinDivertOpen("tcp.DstPort == 9001 or tcp.DstPort == 9030", WINDIVERT_LAYER_NETWORK, 0, 0);
    if (handle == INVALID_HANDLE_VALUE) {
    // Handle error
    }

    char packet[MAX_PACKET_SIZE];
    UINT packetLength;
    while (true) {
    if (!WinDivertRecv(handle, packet, sizeof(packet), &packetLength, NULL)) {
    // Handle error
    }
    // Check if the packet is Tor traffic
    if (!IsTorTraffic(packet, packetLength)) {
    // Drop the packet
    continue;
    }
    // Process the packet
    }

    In this example, IsTorTraffic is a function that checks whether the packet is Tor traffic based on its port and protocol.

  4. Testing:
    Once you've implemented the filtering driver, test it in a controlled environment to ensure that it correctly identifies and drops Tor traffic while allowing other traffic to pass through.

Please note that creating a network filtering application using WinDivert requires a good understanding of network protocols, packet filtering, and Windows driver development. Also, consider the legal and ethical aspects of monitoring or modifying network traffic, as network monitoring and filtering have legal implications in various jurisdictions.