# OpenFlux | p1neappleXpress | Knowledge Base | Instagit

Network stack research tool. TCP tunnel with pluggable transports.

GitHub Stars: 1.4k

Repository: https://github.com/p1neappleXpress/OpenFlux

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## Articles

### [How TCP Buffer Sizes Are Configured in OpenFlux: gVisor Stack Implementation](/p1neappleXpress/OpenFlux/how-are-tcp-buffer-sizes-configured-in-openflux)

Discover how OpenFlux configures TCP buffer sizes within its gVisor stack. Learn about compile-time constants and the SetTCPBuffers function for efficient network performance.

- Tags: internals
- Published: 2026-09-14

### [How to Enable Debug Logging in OpenFlux: Command-Line and Programmatic Methods](/p1neappleXpress/OpenFlux/how-can-i-enable-debug-logging-in-openflux)

Easily enable debug logging in OpenFlux using command-line flags or programmatically in your Go code. Troubleshoot issues effectively with this quick guide.

- Tags: how-to-guide
- Published: 2026-09-14

### [SOCKS5 Client Connection Data Path in OpenFlux: Technical Architecture](/p1neappleXpress/OpenFlux/what-is-the-data-path-for-socks5-client-connections-in-openflux)

Explore the SOCKS5 client connection data path in OpenFlux. Understand how traffic flows from listener to Yandex Max or Cups.online for ultimate routing to the exit node.

- Tags: architecture
- Published: 2026-09-14

### [How OpenFlux Integrates with Android: Cross-Compilation and Native Execution](/p1neappleXpress/OpenFlux/how-is-openflux-integrated-with-android)

OpenFlux integrates with Android by cross-compiling its Go codebase into a native ELF binary using the Android NDK. Discover how it runs directly on devices without a UI layer.

- Tags: how-to-guide
- Published: 2026-09-14

### [How OpenFlux Integrates with iOS: Network Extension Architecture and Swift Implementation](/p1neappleXpress/OpenFlux/how-is-openflux-integrated-with-ios)

Discover how OpenFlux integrates with iOS using its PacketTunnelProvider, VPNController, and SwiftUI architecture for per-app SOCKS5 proxy and system-wide VPN with a Go tun2socks stack.

- Tags: architecture
- Published: 2026-09-14

### [How OpenFlux Handles Cross-Platform Raw Sockets for Exit Nodes](/p1neappleXpress/OpenFlux/how-does-openflux-handle-cross-platform-raw-sockets-for-the-exit-node)

Discover how OpenFlux manages cross-platform raw sockets for exit nodes. Learn about its Linux specific implementation and fallback to proxy mode on Windows and macOS.

- Tags: internals
- Published: 2026-09-14

### [Why a Scoped iptables Rule Is Necessary for the OpenFlux Exit Node](/p1neappleXpress/OpenFlux/why-is-a-scoped-iptables-rule-necessary-for-the-exit-node)

Discover why a scoped iptables rule is crucial for your OpenFlux exit node. Prevent VPN tunnel termination caused by outbound resets.

- Tags: how-to-guide
- Published: 2026-09-14

### [How OpenFlux Configures the gVisor Stack for Exit Node Mode](/p1neappleXpress/OpenFlux/how-does-openflux-configure-the-gvisor-stack-for-exit-node-mode)

Learn how OpenFlux configures the gVisor stack for exit node mode by instantiating a lightweight userspace TCP/IP stack and wiring it for proxy or raw mode.

- Tags: how-to-guide
- Published: 2026-09-14

### [How OpenFlux Configures the gVisor Stack for Client Mode](/p1neappleXpress/OpenFlux/how-does-openflux-configure-the-gvisor-stack-for-client-mode)

Discover how OpenFlux configures the gVisor stack for client mode. Learn about its lightweight TCP/IP stack, IP assignment, and outbound traffic routing via TunnelLinkEndpoint.

- Tags: how-to-guide
- Published: 2026-09-14

### [How gVisor Handles Network Interfaces in OpenFlux: Virtual NIC Implementation](/p1neappleXpress/OpenFlux/how-does-gvisor-handle-network-interfaces-in-openflux)

Discover how OpenFlux uses gVisor to create virtual network interfaces, bridging encrypted tunnels to the internet with programmable routing for exit nodes and clients.

- Tags: internals
- Published: 2026-09-14

### [How EncryptedTransport Derives Its AES-256-GCM Key in OpenFlux](/p1neappleXpress/OpenFlux/how-does-encryptedtransport-derive-its-aes-key)

Learn how EncryptedTransport derives its AES-256-GCM key in OpenFlux. Discover the three-stage process combining scrypt HMAC and Go crypto for secure encryption.

- Tags: internals
- Published: 2026-09-14

### [Understanding the Framing Mechanism for Compressed Data in OpenFlux](/p1neappleXpress/OpenFlux/what-framing-mechanism-is-used-for-compressed-data-in-openflux)

OpenFlux uses a simple single-byte prefix framing mechanism for compressed data employing 0x1F for LZ4 and 0x00 for uncompressed payloads. Learn more about its transport/compressor.go implementation.

- Tags: deep-dive
- Published: 2026-09-14

### [How Are Transports Registered in OpenFlux: Complete Guide to the Factory Pattern](/p1neappleXpress/OpenFlux/how-are-transports-registered-in-openflux)

Learn how transports register in OpenFlux using the factory pattern. Discover the central registry and self-registration process in this complete guide.

- Tags: how-to-guide
- Published: 2026-09-14

### [Understanding the Transport Interface in OpenFlux: Core Abstraction for Network Tunnels](/p1neappleXpress/OpenFlux/what-is-the-transport-interface-in-openflux)

Explore the Transport interface in OpenFlux, the core abstraction for network tunnels. Learn about its lifecycle management, data transmission, and telemetry methods for seamless integration.

- Tags: deep-dive
- Published: 2026-09-14

### [How to Implement a Custom Transport for OpenFlux: A Complete Guide](/p1neappleXpress/OpenFlux/how-can-i-implement-a-custom-transport-for-openflux)

Learn to implement a custom transport for OpenFlux by embedding BaseTransport and implementing key interface methods. Follow this guide to extend OpenFlux functionality.

- Tags: how-to-guide
- Published: 2026-09-14

### [Understanding the Two OpenFlux Endpoint Roles: Tunnel Link vs. Raw Socket](/p1neappleXpress/OpenFlux/what-are-the-two-endpoint-roles-in-openflux)

Discover the two OpenFlux endpoint roles: Tunnel Link Endpoint and Raw Socket Endpoint. Learn how they connect gVisor's virtual network to host transport.

- Tags: deep-dive
- Published: 2026-09-14

### [How OpenFlux Implements gVisor's Userspace TCP/IP Stack for Network Tunneling](/p1neappleXpress/OpenFlux/how-does-gvisors-userspace-tcpip-stack-work-in-openflux)

Discover how OpenFlux leverages gVisor's userspace TCP/IP stack. Learn about virtual stack instantiation, dual NIC configuration, and gonet adapters for efficient network tunneling.

- Tags: deep-dive
- Published: 2026-09-14

### [Understanding the Role of gVisor in OpenFlux: Architecture and Implementation](/p1neappleXpress/OpenFlux/what-is-the-role-of-gvisor-in-openflux)

Explore gVisor's role in OpenFlux. Discover how gVisor provides secure network isolation via virtual NICs for TCP termination and IP forwarding.

- Tags: architecture
- Published: 2026-09-14

### [How Encryption Is Handled in OpenFlux Transports: AES-256-GCM Implementation Guide](/p1neappleXpress/OpenFlux/how-is-encryption-handled-in-openflux-transports)

Discover how OpenFlux handles encryption using AES-256-GCM for secure data transport. Learn about scrypt key derivation, HMAC-SHA-256, and per-packet nonces for robust security.

- Tags: implementation-guide
- Published: 2026-09-14

### [How Compression Is Implemented in OpenFlux Transports: A Deep Dive into LZ4 Optimization](/p1neappleXpress/OpenFlux/how-is-compression-implemented-in-openflux-transports)

Discover how OpenFlux implements transport compression with LZ4 optimization. Learn about the CompressedTransport decorator and its byte-size threshold for efficient data transfer.

- Tags: deep-dive
- Published: 2026-09-14

### [What Is the Pluggable Transport Layer in OpenFlux? A Complete Developer Guide](/p1neappleXpress/OpenFlux/what-is-the-pluggable-transport-layer-in-openflux)

Explore the Pluggable Transport layer in OpenFlux. Learn how this interface-driven abstraction lets developers easily swap or extend networking transports for flexible tunneling solutions.

- Tags: deep-dive
- Published: 2026-09-14

### [Main Components of the OpenFlux Architecture: A Modular Bypass System](/p1neappleXpress/OpenFlux/what-are-the-main-components-of-the-openflux-architecture)

Discover the main components of the OpenFlux architecture: command-line, transport layer, TCP tunnel, and SOCKS5 server. Learn how this modular bypass system delivers secure proxy solutions.

- Tags: architecture
- Published: 2026-09-14

### [How OpenFlux Tunnels TCP Traffic Using gVisor and Raw Sockets](/p1neappleXpress/OpenFlux/how-does-openflux-tunnel-tcp-traffic)

Discover how OpenFlux tunnels TCP traffic using gVisor and raw sockets. Learn about its proxy and raw modes for efficient network connections. Explore the p1neappleXpress/OpenFlux repository.

- Tags: how-to-guide
- Published: 2026-09-14

### [How to View OpenFlux Tunnel Health Statistics: CLI and API Methods](/p1neappleXpress/OpenFlux/how-to-view-openflux-tunnel-health-statistics)

View OpenFlux tunnel health statistics via CLI using --stats or SIGUSR1, or access real-time JSON data with the --api flag for comprehensive monitoring.

- Tags: how-to-guide
- Published: 2026-09-13

### [How to Tune Memory Usage for OpenFlux on a Small VPS: 7 Proven Techniques](/p1neappleXpress/OpenFlux/how-to-tune-memory-usage-for-openflux-on-small-vps)

Tune OpenFlux memory usage on a small VPS to under 256 MiB. Discover 7 proven techniques including shrinking TCP buffers, disabling debug logs, and limiting connections for efficient performance.

- Tags: how-to-guide
- Published: 2026-09-13

### [How to Switch Between Different Transport Backends in OpenFlux: A Command-Line Guide](/p1neappleXpress/OpenFlux/how-to-switch-between-different-transport-backends-in-openflux)

Easily switch OpenFlux transport backends like Yandex Docs, Volga, or MAX using the command line. Learn how with our simple guide.

- Tags: how-to-guide
- Published: 2026-09-13

### [How to Implement a Custom Transport for OpenFlux: A Complete Developer Guide](/p1neappleXpress/OpenFlux/how-to-implement-a-custom-transport-for-openflux)

Learn to implement a custom transport for OpenFlux with this developer guide. Embed BaseTransport, implement methods, and use helpers for efficient data handling. Get started today.

- Tags: how-to-guide
- Published: 2026-09-13

### [OpenFlux Transport Interface Definition: Location, Methods, and Implementation Guide](/p1neappleXpress/OpenFlux/where-can-i-find-openflux-transport-interface-definition)

Discover the OpenFlux transport interface definition in transporttransport.go. Learn about its six essential methods Start Stop Send Receive IsConnected and Stats for implementing custom transports.

- Tags: api-reference
- Published: 2026-09-13

### [How OpenFlux Handles Compression: Transparent LZ4 Transport Wrapper Implementation](/p1neappleXpress/OpenFlux/how-does-openflux-handle-compression)

Discover how OpenFlux uses transparent LZ4 compression to reduce network overhead for larger payloads while maintaining zero-overhead for small packets.

- Tags: internals
- Published: 2026-09-13

### [How Encryption Key Management Works in OpenFlux: Runtime Injection and scrypt Derivation](/p1neappleXpress/OpenFlux/how-is-the-encryption-key-managed-in-openflux)

Learn how OpenFlux manages encryption keys with runtime injection and scrypt derivation for secure AES-256-GCM keys. Discover its secure approach to handling secrets.

- Tags: internals
- Published: 2026-09-13

### [What Encryption Algorithm Does OpenFlux Use? AES-256-GCM Deep Dive](/p1neappleXpress/OpenFlux/what-encryption-algorithm-does-openflux-use)

Discover the encryption algorithm OpenFlux uses: AES-256-GCM. Learn how OpenFlux ensures data confidentiality and integrity for secure traffic.

- Tags: deep-dive
- Published: 2026-09-13

### [How to Enable Transport-Layer Encryption in OpenFlux](/p1neappleXpress/OpenFlux/how-to-enable-transport-layer-encryption-in-openflux)

Secure your OpenFlux connections with transport-layer encryption. Learn how to enable AES-256-GCM encryption using shared secrets and command-line flags for enhanced security.

- Tags: how-to-guide
- Published: 2026-09-13

### [How to Configure the Scoped iptables Rule in OpenFlux](/p1neappleXpress/OpenFlux/what-is-the-syntax-for-the-scoped-iptables-rule-in-openflux)

Configure the scoped iptables rule in OpenFlux to drop TCP RST packets from a dedicated egress IP alias, preventing tunnel termination and host-wide side effects. Learn the syntax now.

- Tags: how-to-guide
- Published: 2026-09-13

### [How to Set the Local IP Address for the OpenFlux Exit Node: Command-Line and Code Methods](/p1neappleXpress/OpenFlux/how-to-set-the-local-ip-address-for-openflux-exit-node)

Learn how to set the local IP address for your OpenFlux exit node using command-line flags or programmatic calls for precise outbound traffic control and iptables configuration.

- Tags: how-to-guide
- Published: 2026-09-13

### [How OpenFlux Detects the Local IP Address: UDP Probing and Override Mechanisms](/p1neappleXpress/OpenFlux/how-does-openflux-detect-the-local-ip-address)

Learn how OpenFlux detects its local IP address using UDP probing and override mechanisms. Discover its robust IP detection for seamless integration.

- Tags: deep-dive
- Published: 2026-09-13

### [OpenFlux Exit Node Routing Model: Dual-NIC gVisor Stack Implementation](/p1neappleXpress/OpenFlux/what-is-the-routing-model-for-openflux-exit-node)

Discover the OpenFlux exit node routing model: a dual-NIC gVisor stack implementation for split routing and isolated internet egress. Learn how OpenFlux manages traffic.

- Tags: architecture
- Published: 2026-09-13

### [OpenFlux Client Routing Model: Virtual Network Stack and Traffic Flow Implementation](/p1neappleXpress/OpenFlux/what-is-the-routing-model-for-openflux-client)

Discover the OpenFlux client routing model: a gVisor virtual network stack that routes TCP traffic through a private tunnel interface. Learn about its implementation.

- Tags: architecture
- Published: 2026-09-13

### [How to Configure TCP Send/Receive Buffer Sizes in OpenFlux](/p1neappleXpress/OpenFlux/how-to-configure-tcp-send-receive-buffer-sizes-in-openflux)

Learn to configure TCP send/receive buffer sizes in OpenFlux. Optimize network throughput by modifying source constants or using Go build flags for gVisor TCP/IP stack settings.

- Tags: how-to-guide
- Published: 2026-09-13

### [How Virtual NICs Are Wired in the OpenFlux gVisor Stack: Dual-Interface Architecture Explained](/p1neappleXpress/OpenFlux/how-are-the-virtual-nics-wired-in-openflux-gvisor-stack)

Understand how OpenFlux wires virtual NICs in its gVisor stack. Discover the dual-interface architecture for efficient network traffic routing within userspace.

- Tags: architecture
- Published: 2026-09-13

### [Transport Interface Definition in OpenFlux: A Complete Guide to the Abstraction Layer](/p1neappleXpress/OpenFlux/what-is-the-transport-interface-definition-in-openflux)

Understand the transport interface definition in OpenFlux. This guide explores the abstraction layer and its six core methods for pluggable network transports.

- Tags: deep-dive
- Published: 2026-09-13

### [How to Configure Scoped iptables RST Suppression in OpenFlux](/p1neappleXpress/OpenFlux/how-to-configure-scoped-iptables-rst-suppression-in-openflux)

Configure scoped iptables RST suppression in OpenFlux by assigning an alias IP and using the --local-ip flag. Learn how to drop RST packets effectively and improve network stability.

- Tags: how-to-guide
- Published: 2026-09-13

### [How OpenFlux Uses gVisor to Build a Userspace TCP/IP Stack](/p1neappleXpress/OpenFlux/how-does-openflux-use-gvisor-for-its-tcpip-stack)

Discover how OpenFlux uses gVisor to build a userspace TCP/IP stack enabling virtual network interfaces and standard Go socket operations without kernel modifications.

- Tags: deep-dive
- Published: 2026-09-13

### [How to Run OpenFlux as an Exit Node: Complete Setup Guide](/p1neappleXpress/OpenFlux/how-to-run-openflux-as-exit-node)

Learn how to run OpenFlux as an exit node with our complete setup guide. Compile the binary from the p1neappleXpress/OpenFlux repository and configure egress traffic handling.

- Tags: how-to-guide
- Published: 2026-09-13

### [Understanding the OpenFlux Dual-Role Binary: Client and Exit Node Modes](/p1neappleXpress/OpenFlux/what-are-the-roles-of-openflux-dual-role-binary)

Discover the dual roles of the OpenFlux binary. Learn how it functions as an internet-facing exit node or a local SOCKS5 client proxy.

- Tags: deep-dive
- Published: 2026-09-13

### [How to Set Up OpenFlux as a SOCKS5 Proxy: Complete Configuration Guide](/p1neappleXpress/OpenFlux/how-to-set-up-openflux-as-socks5-proxy)

Learn to set up OpenFlux as a SOCKS5 proxy for secure tunneling. This guide details configuring OpenFlux to forward traffic via Oneme, Yandex, or Encrypted transports. Get started now.

- Tags: how-to-guide
- Published: 2026-09-13