From 4e6494fa8a50228ed0cc7580a702df981fbb9bea Mon Sep 17 00:00:00 2001
From: Michele Cereda <cereda.michele@gmail.com>
Date: Thu, 25 May 2023 21:41:10 +0200
Subject: [PATCH] feat: article and configuration file example about stunnel

---
 examples/stunnel.config   |  6 +++++
 knowledge base/stunnel.md | 46 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+)
 create mode 100644 examples/stunnel.config
 create mode 100644 knowledge base/stunnel.md

diff --git a/examples/stunnel.config b/examples/stunnel.config
new file mode 100644
index 0000000..51bbb39
--- /dev/null
+++ b/examples/stunnel.config
@@ -0,0 +1,6 @@
+[redis-cli]
+client = yes
+accept = 127.0.0.1:6380
+connect = redis.lan:6380
+
+; CAfile = /home/user/trusted.certs.pem
diff --git a/knowledge base/stunnel.md b/knowledge base/stunnel.md
new file mode 100644
index 0000000..1cc472b
--- /dev/null
+++ b/knowledge base/stunnel.md	
@@ -0,0 +1,46 @@
+# Stunnel
+
+Proxy designed to add TLS encryption functionality to existing clients and servers without any changes in the programs' code.
+
+## Table of contents <!-- omit in toc -->
+
+1. [TL;DR](#tldr)
+1. [Further readings](#further-readings)
+1. [Sources](#sources)
+
+## TL;DR
+
+In Unix-like operating systems:
+
+```sh
+# Install it.
+brew install 'stunnel'
+
+# Show default socket options.
+stunnel -sockets
+
+# Show supported TLS options.
+stunnel -options
+
+# Start the process.
+stunnel 'path/to/config/file'
+```
+
+## Further readings
+
+- [Website]
+- [Sample configuration for Unix systems]
+
+## Sources
+
+All the references in the [further readings] section, plus the following:
+
+<!-- project's references -->
+[sample configuration for unix systems]: https://www.stunnel.org/config_unix.html
+[website]: https://www.stunnel.org/
+
+<!-- in-article references -->
+[further readings]: #further-readings
+
+<!-- internal references -->
+<!-- external references -->