NetworkOptimizer-Proxy

A Traefik reverse proxy setup designed for Network Optimizer that solves the HTTP/1.1 speed test problem with a single proxy instance.

The Problem

OpenSpeedTest requires HTTP/1.1 for accurate throughput measurements - HTTP/2 multiplexing and flow control interfere with speed test results. Most reverse proxies (including Caddy) negotiate HTTP/2 at the TLS level and can't serve different protocols per hostname on the same port.

The Solution

Traefik supports per-router TLS options, including ALPN protocol selection. This setup uses a custom TLS option (h1only) that only advertises http/1.1 during the TLS handshake for the speed test hostname, while the main app uses the default HTTP/2 negotiation. One proxy, one IP, one port 443.

Quick Start (Docker)

git clone https://github.com/Ozark-Connect/NetworkOptimizer-Proxy.git
cd NetworkOptimizer-Proxy

# Run setup script (creates config files from examples, sets permissions)
bash setup.sh

# Edit your configuration
nano .env                    # Cloudflare token, email, listen IP
nano dynamic/config.yml      # Update hostnames

# Start
docker compose up -d

Windows (MSI)

Traefik is included as an optional feature in the Network Optimizer MSI installer. When selected, the installer prompts for Cloudflare DNS settings and the service manages Traefik as a child process alongside nginx.

The windows/ directory contains the config templates used by the MSI build:

• traefik.yml.template - Static config with placeholders for registry values
• config.yml.template - Dynamic config with placeholders for hostnames/ports

Requirements

• For Linux: Docker and Docker Compose
• For Windows: Network Optimizer MSI installer (Traefik feature)
• A domain with DNS managed by Cloudflare (for automatic Let's Encrypt certificates)
• Two DNS A records pointing to the host running Traefik:
  • e.g. optimizer.yourdomain.com - Network Optimizer web UI
  • e.g. speedtest.yourdomain.com - OpenSpeedTest (HTTP/1.1)

Configuration

Environment Variables (.env)

Variable	Required	Default	Description
ACME_EMAIL	Yes	-	Email for Let's Encrypt registration
CF_DNS_API_TOKEN	Yes	-	Cloudflare API token with Zone:DNS:Edit permissions
LISTEN_IP	No	0.0.0.0	Bind to a specific IP address
LOG_LEVEL	No	INFO	Log verbosity: DEBUG, INFO, WARN, ERROR

Dynamic Config (dynamic/config.yml)

Copy from the example and update hostnames:

cp config.example.yml dynamic/config.yml

The example config includes two routers:

• optimizer - Network Optimizer on HTTP/2 (default TLS)
• speedtest - OpenSpeedTest on HTTP/1.1 (h1only TLS option)

Edit the Host() rules to match your DNS:

optimizer:
  rule: "Host(`optimizer.yourdomain.com`)"
  # ...

speedtest:
  rule: "Host(`speedtest.yourdomain.com`)"
  # ...

Secrets (dynamic/secrets.yml)

Optional file for middleware that injects credentials (e.g., Basic Auth headers for backend services). Copy from example if needed:

cp secrets.example.yml dynamic/secrets.yml

This file is gitignored and managed directly on the host.

How It Works

HTTP/1.1 for Speed Tests

The h1only TLS option restricts ALPN negotiation to http/1.1 only:

tls:
  options:
    h1only:
      minVersion: VersionTLS12
      alpnProtocols:
        - "http/1.1"

When a browser connects to the speed test hostname, the TLS handshake negotiates HTTP/1.1 instead of HTTP/2. The speed test router references this option:

speedtest:
  rule: "Host(`speedtest.yourdomain.com`)"
  tls:
    options: h1only  # Forces HTTP/1.1 on the client connection

Speed Test Optimizations

In addition to HTTP/1.1, the speed test route strips the Accept-Encoding header to prevent transparent compression from skewing results.

Automatic HTTPS

Traefik uses Let's Encrypt with Cloudflare DNS-01 challenges, so:

• No port 80 exposure required for certificate validation
• Wildcard certificates are supported
• Certificates auto-renew before expiry

By default, DNS propagation checking is disabled (disablepropagationcheck=true) and replaced with a fixed 15-second delay. This avoids certificate failures caused by local DNS resolvers (Pi-hole, NextDNS, AdGuard Home, etc.) that may not see the Cloudflare TXT records during validation. Cloudflare's API is fast enough that 15 seconds is plenty.

Adding More Services

To proxy additional services behind Traefik, add routers and services to dynamic/config.yml. Example:

http:
  routers:
    my-service:
      rule: "Host(`myservice.yourdomain.com`)"
      entryPoints:
        - websecure
      service: my-service
      tls:
        certResolver: letsencrypt
      middlewares:
        - security-headers

  services:
    my-service:
      loadBalancer:
        servers:
          - url: "http://localhost:9090"

IP Restrictions

Use the ipAllowList middleware to restrict access:

http:
  middlewares:
    lan-only:
      ipAllowList:
        sourceRange:
          - "192.168.0.0/16"
          - "10.0.0.0/8"

  routers:
    my-service:
      middlewares:
        - security-headers
        - lan-only

Architecture

Internet
    |
    v
[Traefik :443]
    |
    |-- optimizer.example.com (HTTP/2, default TLS)  -->  localhost:8042
    |
    |-- speedtest.example.com (HTTP/1.1, h1only TLS) -->  localhost:3005
    |
    |-- (other services...)
    |
[Traefik :80]
    |-- All HTTP --> 301 redirect to HTTPS

• Single Traefik instance handles all hostnames
• Host networking (network_mode: host) for direct access to local services
• DNS-01 challenges via Cloudflare (no HTTP-01, no port 80 exposure needed)
• File provider watches dynamic/ for config changes (hot reload, no restart needed)

Extracting Certificates

Traefik stores all Let's Encrypt certificates in acme/acme.json. To extract a certificate for use elsewhere (e.g., a UniFi gateway):

# Install traefik-certs-dumper (or use jq)
docker run --rm -v ./acme:/acme ldez/traefik-certs-dumper file \
  --source /acme/acme.json --dest /acme/certs \
  --domain-subdir

Troubleshooting

Certificates not issuing: Check that your Cloudflare API token has Zone:DNS:Edit permissions and that the domain's DNS is managed by Cloudflare. Check logs with docker compose logs. If you see NXDOMAIN or propagation timeout errors, your local DNS resolver may be interfering - the default config already handles this, but you can increase delaybeforecheck in docker-compose.yml if needed.

Speed test still using HTTP/2: Verify the speed test router references options: h1only in its TLS config. Check with: curl -v https://speedtest.yourdomain.com 2>&1 | grep ALPN.

Port conflict: If another service (e.g., Caddy) is already using port 443, set LISTEN_IP in .env to bind Traefik to a specific IP address.

License

MIT