privsec.dev/content/posts/proxies/Update your Signal TLS Proxy.md
Tommy bf55611133
Reorganize (#72)
* Reorganize

Signed-off-by: Tommy <contact@tommytran.io>
2022-10-17 05:30:43 -04:00

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Markdown

---
title: "Update your Signal TLS Proxy"
date: 2022-10-15
tags: ['Applications', 'Linux', 'Container', 'Censorship Evasion']
author: Tommy
---
![Signal](/images/plz-merge.jpg)
Given the current censorship situation in Iran, I decided to have a look at the [Signal TLS Proxy](https://github.com/signalapp/Signal-TLS-Proxy).
One thing immediately jumped out - the NGINX image has not been updated [for years](https://github.com/signalapp/Signal-TLS-Proxy/blob/ac94d6b869f942ec05d7ef76840287a1d1f487f9/nginx-relay/Dockerfile#L9). In fact, NGINX 1.18 is so old that it has gone end of life for [a year and a half](https://endoflife.date/nginx) as of this writing.
If you are deploying or maintaining a Signal TLS Proxy, I highly recommend that you use the upstream `nginx:alpine` image instead.
My Docker Compose setup can be found [here](https://github.com/tommytran732/Signal-TLS-Proxy). I have also fixed the missing `:Z` flag for mountpoints and and dropped privileges to reduce the attack surface. I made a couple of pull requests for these changes, but Signal is being very slow on reviewing and merging them, so... yeah.
- [Drop capabilities](https://github.com/signalapp/Signal-TLS-Proxy/pull/24)
- [Use upstream NGINX image](https://github.com/signalapp/Signal-TLS-Proxy/pull/23)
- [Add :Z for SELinux](https://github.com/signalapp/Signal-TLS-Proxy/pull/22)