h1. SnowFlake

* https://community.torproject.org/relay/setup/snowflake/standalone

* https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/wikis/home

* https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/wikis/Technical%20Overview

h2. VM snowflake.tetaneutral.net

h3. juin 2023 : mise à jour en Debian 12 bookworm

Le paquet @snowflake-proxy@ est inclus dans le système, La compilation manuelle décrite ci-dessous n'est plus néessaire. 

Désactivation de l'ancien service @snowflake@ au profit de @snowflake-proxy@ fournit par bookworm.

h3. Compilation depuis les sources golang dans le compte snowflake 

<pre>

root@snowflake:~# apt install golang tmux

root@snowflake:~# useradd -c "Snowflake user" -s /bin/bash -m snowflake

root@snowflake:~# passwd -l snowflake

root@snowflake:~# su - snowflake

snowflake@snowflake:~$ git clone https://git.torproject.org/pluggable-transports/snowflake.git

snowflake@snowflake:~$ cd snowflake/proxy

snowflake@snowflake:~/snowflake/proxy$ go build 

</pre>

h3. Lancement via systemd: /etc/systemd/system/snowflake.service :

<pre>

[Unit]

Description=snowflake proxy

After=network.target

[Service]

Type=simple

User=proxy

WorkingDirectory=/home/snowflake

ExecStart=/home/snowflake/snowflake/proxy/proxy

TimeoutSec=15

Restart=always

[Install]

WantedBy=multi-user.target

</pre>

Activation: 

<pre>

root@snowflake:~# systemctl daemon-reload

root@snowflake:~# systemctl enable snowflake.service

root@snowflake:~# systemctl start snowflake.service

</pre>

h3. Logs /stats

<pre>

root@snowflake:~# journalctl -u snowflake.service

Mar 03 07:36:37 snowflake systemd[1]: Started snowflake proxy.

Mar 03 07:36:37 snowflake proxy[10295]: 2022/03/03 06:36:37 In the last 1h0m0s, there are 0 connections. Traffic Relayed ↑ 0 B, ↓ 0 B.

Mar 03 08:36:37 snowflake proxy[10295]: 2022/03/03 07:36:37 In the last 1h0m0s, there are 9 connections. Traffic Relayed ↑ 4 MB, ↓ 4 MB.

Mar 03 09:36:37 snowflake proxy[10295]: 2022/03/03 08:36:37 In the last 1h0m0s, there are 12 connections. Traffic Relayed ↑ 19 MB, ↓ 19 MB.

Mar 03 10:36:37 snowflake proxy[10295]: 2022/03/03 09:36:37 In the last 1h0m0s, there are 6 connections. Traffic Relayed ↑ 1 MB, ↓ 1 MB.

Mar 03 11:36:37 snowflake proxy[10295]: 2022/03/03 10:36:37 In the last 1h0m0s, there are 19 connections. Traffic Relayed ↑ 17 MB, ↓ 17 MB.

Mar 03 12:36:37 snowflake proxy[10295]: 2022/03/03 11:36:37 In the last 1h0m0s, there are 11 connections. Traffic Relayed ↑ 11 MB, ↓ 11 MB.

Mar 03 13:36:37 snowflake proxy[10295]: 2022/03/03 12:36:37 In the last 1h0m0s, there are 20 connections. Traffic Relayed ↑ 12 MB, ↓ 12 MB.

Mar 03 14:36:37 snowflake proxy[10295]: 2022/03/03 13:36:37 In the last 1h0m0s, there are 15 connections. Traffic Relayed ↑ 26 MB, ↓ 26 MB.

Mar 03 15:36:37 snowflake proxy[10295]: 2022/03/03 14:36:37 In the last 1h0m0s, there are 16 connections. Traffic Relayed ↑ 46 MB, ↓ 46 MB.

Mar 03 16:36:37 snowflake proxy[10295]: 2022/03/03 15:36:37 In the last 1h0m0s, there are 20 connections. Traffic Relayed ↑ 32 MB, ↓ 32 MB.

Mar 03 17:36:37 snowflake proxy[10295]: 2022/03/03 16:36:37 In the last 1h0m0s, there are 11 connections. Traffic Relayed ↑ 8 MB, ↓ 8 MB.

Mar 03 18:36:37 snowflake proxy[10295]: 2022/03/03 17:36:37 In the last 1h0m0s, there are 12 connections. Traffic Relayed ↑ 40 MB, ↓ 40 MB.

Mar 03 19:36:37 snowflake proxy[10295]: 2022/03/03 18:36:37 In the last 1h0m0s, there are 11 connections. Traffic Relayed ↑ 12 MB, ↓ 12 MB.

</pre>