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@ -6,18 +6,18 @@ The following traffic attacks are mitigated in NaïveProxy:
* Website fingerprinting / traffic classification: [mitigated](https://arxiv.org/abs/1707.00641) by traffic multiplexing in HTTP/2. * Website fingerprinting / traffic classification: [mitigated](https://arxiv.org/abs/1707.00641) by traffic multiplexing in HTTP/2.
* [TLS parameter fingerprinting](https://arxiv.org/abs/1607.01639): defeated by reusing [Chrome's network stack](https://www.chromium.org/developers/design-documents/network-stack). * [TLS parameter fingerprinting](https://arxiv.org/abs/1607.01639): defeated by reusing [Chrome's network stack](https://www.chromium.org/developers/design-documents/network-stack).
* [Active probing](https://ensa.fi/active-probing/): defeated by *application fronting*, i.e. hiding proxy servers behind a commonly used frontend with application-layer routing. * [Active probing](https://ensa.fi/active-probing/): defeated by *application fronting*, i.e. hiding proxy servers behind a commonly used frontend server with application-layer routing.
* Length-based traffic analysis: mitigated by length padding. * Length-based traffic analysis: mitigated by length padding.
## Architecture ## Architecture
[Browser → Naïve (client)] ⟶ Censor ⟶ [Frontend → Naïve (server)] ⟶ Internet [Browser → Naïve client] ⟶ Censor ⟶ [Frontend → Naïve server] ⟶ Internet
NaïveProxy uses Chrome's network stack. Its visible traffic behavior is identical to regular HTTP/2 traffic between Chrome and standard Frontend (e.g. Caddy, HAProxy). NaïveProxy uses Chrome's network stack to ensure its observable behavior is identical to regular HTTP/2 traffic between Chrome and standard frontend servers.
Frontend also reroutes unauthenticated users and active probes to a backend HTTP server, making it impossible to detect the existence of a proxy, like this: Probe ⟶ Frontend ⟶ index.html The frontend server can be any reverse proxy that is able to route HTTP/2 traffic based on HTTP authorization headers, preventing active probing of proxy existence. Known ones include Caddy with its forwardproxy plugin and HAProxy.
Starting from v84, users can run a naïve fork of Caddy forwardproxy without the Naïve server. The Naïve server here works as a forwarding proxy and a packet length padding layer. Caddy forwardproxy is also a forwarding proxy but it lacks a padding layer. A [fork](https://github.com/klzgrad/forwardproxy) adds the NaïveProxy padding layer to Caddy forwardproxy, combining both in one.
## Download binaries ## Download binaries
@ -25,15 +25,17 @@ Starting from v84, users can run a naïve fork of Caddy forwardproxy without the
Users should always use the latest version to keep signatures identical to Chrome. Users should always use the latest version to keep signatures identical to Chrome.
## Setup ## Server setup
On the server, build and run Caddy v2 with naïve fork of forwardproxy: The following describes the [naïve fork of Caddy](https://github.com/klzgrad/forwardproxy) setup.
Build:
```sh ```sh
go get -u github.com/caddyserver/xcaddy/cmd/xcaddy go get -u github.com/caddyserver/xcaddy/cmd/xcaddy
~/go/bin/xcaddy build --with github.com/caddyserver/forwardproxy@caddy2=github.com/klzgrad/forwardproxy@naive ~/go/bin/xcaddy build --with github.com/caddyserver/forwardproxy@caddy2=github.com/klzgrad/forwardproxy@naive
sudo setcap cap_net_bind_service=+ep ./caddy
``` ```
Then `./caddy start` with the following Caddyfile (replace `user` and `pass` accordingly):
Example Caddyfile (replace `user` and `pass` accordingly):
``` ```
:443, example.com :443, example.com
tls me@example.com tls me@example.com
@ -47,9 +49,19 @@ route {
file_server { root /var/www/html } file_server { root /var/www/html }
} }
``` ```
`:443` must appear first for this Caddyfile to work. For more advanced usage consider using [JSON for Caddy 2's config](https://caddyserver.com/docs/json/).. `:443` must appear first for this Caddyfile to work. For more advanced usage consider using [JSON for Caddy 2's config](https://caddyserver.com/docs/json/).
Locally run `./naive` with the following `config.json` to get a SOCKS5 proxy at local port 1080. Run with the Caddyfile:
```
sudo setcap cap_net_bind_service=+ep ./caddy
./caddy start
```
See also [Systemd unit example](https://github.com/klzgrad/naiveproxy/wiki/Run-Caddy-as-a-daemon) and [HAProxy setup](https://github.com/klzgrad/naiveproxy/wiki/HAProxy-Setup).
## Client setup
Run `./naive` with the following `config.json` to get a SOCKS5 proxy at local port 1080.
```json ```json
{ {
"listen": "socks://127.0.0.1:1080", "listen": "socks://127.0.0.1:1080",
@ -57,16 +69,16 @@ Locally run `./naive` with the following `config.json` to get a SOCKS5 proxy at
} }
``` ```
See [USAGE.txt](https://github.com/klzgrad/naiveproxy/blob/master/USAGE.txt) for more parameters in `config.json`. See also [Performance Tuning](https://github.com/klzgrad/naiveproxy/wiki/Performance-Tuning). See also [parameter usage](https://github.com/klzgrad/naiveproxy/blob/master/USAGE.txt) and [performance tuning](https://github.com/klzgrad/naiveproxy/wiki/Performance-Tuning).
## Build from source ## Build from source
If you don't like to download binaries, you can build NaïveProxy. If you don't like to download binaries, you can build NaïveProxy.
Prerequisites: Prerequisites:
* Ubuntu (apt-get install): git, python, ninja-build (>= 1.7), pkg-config, curl, unzip, ccache (optional) * Ubuntu (apt install): git, python, ninja-build (>= 1.7), pkg-config, curl, unzip, ccache (optional)
* MacOS (brew install): git, ninja, ccache (optional) * MacOS (brew install): git, ninja, ccache (optional)
* Windows ([choco install](https://chocolatey.org/)): git, python, ninja, visualstudio2017community. See [Chromium's page](https://chromium.googlesource.com/chromium/src/+/master/docs/windows_build_instructions.md#Visual-Studio) for detail on Visual Studio setup requirements. * Windows ([choco install](https://chocolatey.org/)): git, python, ninja, visualstudio2019community. See [Chromium's page](https://chromium.googlesource.com/chromium/src/+/master/docs/windows_build_instructions.md#Visual-Studio) for detail on Visual Studio requirements.
Build (output to `./out/Release/naive`): Build (output to `./out/Release/naive`):
``` ```