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funnelproxy

Overview

This is a quick & dirty HTTP proxy to expose a URL on its own hostname through Tailscale Funnel.

This can be thought of as equivalent to running the following on a Tailscale node:

sudo tailscale serve https / https://target-url
sudo tailscale funnel 443 on

The difference is, funnelproxy creates its own hostname for the served URL. This can be useful in cases where you need to serve more than one webapp, and those webapps don't work with relative paths.

Prerequisites

  1. Follow the Tailscale Funnel setup instructions (if you have not used Funnel before)
  2. Generate an auth key at Admin console > Settings > Keys

Usage

go install github.com/tris/funnelproxy@latest
TS_AUTHKEY=tskey-auth-xxx funnelproxy fun http://target-url

This will create https://fun.<tailnet>.ts.net, forwarding all requests to http://target-url.

Docker

docker volume create fp_fun
TS_AUTHKEY=tskey-auth-xxx docker run --rm \
  --name fp_fun \
  -v fp_fun:/state \
  -e TS_AUTHKEY \
  ghcr.io/tris/funnelproxy -- -d /state fun http://target-url

Docker Compose

version: '3'

volumes:
  fp_fun: {}

services:
  fp_fun:
    image: ghcr.io/tris/funnelproxy
    volumes:
    - fp_fun:/state
    environment:
    - TS_AUTHKEY=tskey-auth-xxx
    command:
    - '--statedir=/state'
    - 'fun'
    - 'http://target-url'
    restart: unless-stopped

See also