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Project title: C++ Dev- Multi-Internet Sys with Netfilter SDK (WFP) for UDP/TCP
Posted by: External project from PeoplePerHour
Started: 18-Aug-2025 15:19 GMT
Description: We are looking for an experienced C++ developer with strong knowledge of Windows Filtering Platform (WFP) and Netfilter SDK to build a multi-internet packet duplication system for Windows 10/11.

Goal:
Use two or more active internet connections simultaneously (e.g., Ethernet + Wi-Fi, Ethernet + 4G from different ISPs) to send duplicated packets from a selected game/application to a proxy server (localhost or external). The system must not work as fallback — both connections must be active at the same time, and if one is disconnected, the game must continue without interruption. When the connection is restored, it must be used again automatically.

Note: The Netfilter SDK driver is paid software, but we already have a valid license. The developer will not need to purchase it.

Traffic Flow:
Network (Internet A + Internet B) → Proxy Server (Localhost or External) → Game

Key Requirements:
Windows 10/11
C++ development
Netfilter SDK2 (http://netfiltersdk.com/) with WFP driver
Must support UDP (priority) and TCP, ICMP, ICMPv6
IPv4 and IPv6 support
Multi-threaded design for high performance
Throughput - 1 Gbps, added latency - 0.1 ms
Traffic filtering by executable name, ports, and IP ranges
Dynamic filter configuration without restart

Main Challenge:
Duplicate outgoing packets through all active interfaces
Handle duplicate incoming packets correctly
Maintain connection during interface failure
Automatic reconnection for restored interfaces

Delivery Requirement:
Full C++ source code + build instructions
Configuration file and documentation

Demonstration video:
Run one TCP game (Medivia, free to download) and one UDP game (Albion Online or Fortnite, free to download) through the system
Unplug cable or disable one interface → game stays connected via the other
Reconnect and repeat test with the other interface
Project ID: 3445579
Project category:
Project budget:
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