sixtunnel
« Back to VersTracker
Description:
Tunnelling for application that don't speak IPv6
Type: Formula  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  formulae.brew.sh
Category: Networking
Tags: ipv6 networking proxy tunnel tcp ipv4
Install: brew install sixtunnel
About:
6tunnel is a specialized TCP proxy designed to enable IPv4-only applications to communicate with IPv6 addresses. It listens on a local IPv4 port and forwards all incoming traffic to a specified IPv6 destination. This lightweight utility serves as a crucial bridge for legacy software that lacks native IPv6 support, ensuring connectivity in modern network environments.
Key Features:
  • Forwards TCP connections from IPv4 to IPv6
  • Supports listening on specific network interfaces
  • Can relay connections to remote hosts
  • Handles port forwarding for legacy applications
  • Lightweight and simple command-line interface
Use Cases:
  • Running IPv4-only applications in IPv6-only network environments
  • Providing access to IPv6-only services from legacy IPv4 clients
  • Setting up simple TCP relays for network bridging
Alternatives:
  • socat – More versatile but with a more complex syntax; 6tunnel is purpose-built for IPv4-to-IPv6 translation
  • haproxy – Enterprise-grade load balancer that can handle IPv6, but significantly heavier than 6tunnel for simple proxying
Version History
Detected Version Rev Change Commit
Sep 15, 2025 10:50am 0 VERSION_BUMP ad49059d