gemini/freebsd.gmi
2021-03-08 22:59:50 +01:00

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# Installing vger on FreeBSD, using inetd and nginx
## Get the sources and compile 'em
```shell
$ git clone https://tildegit.org/solene/vger.git
$ cd vger
$ make
$ sudo make install
```
## Create a dedicated user
Create a user with no shell and no password
```shell
# adduser
Username: gemini
Full name: gemini
Uid (Leave empty for default):
Login group [gemini]:
Login group is gemini. Invite gemini into other groups? []:
Login class [default]:
Shell (sh csh tcsh bash rbash zsh rzsh git-shell nologin) [sh]: nologin
Home directory [/home/gemini]:
Home directory permissions (Leave empty for default):
Use password-based authentication? [yes]: no
Lock out the account after creation? [no]:
Username : gemini
Password : <disabled>
Full Name : gemini
Uid : 1015
Class :
Groups : gemini
Home : /home/gemini
Home Mode :
Shell : /usr/sbin/nologin
Locked : no
OK? (yes/no): yes
adduser: INFO: Successfully added (gemini) to the user database.
Add another user? (yes/no): no
Goodbye!
```
## Add a service
inetd requires a defined service in /etc/services, so let's add it
```
echo "gemini 11965/tcp">>/etc/services
```
## Activate and launch inetd
* Add the following lines to /etc/inetd.conf. Adjust -d parameter to previously created user's home directory, don't forget the last slash:
```
gemini stream tcp nowait gemini /usr/local/bin/vger vger -v -i -d /home/gemini/
gemini stream tcp6 nowait gemini /usr/local/bin/vger vger -v -i -d /home/gemini/
```
* Activate inetd either by issuing
```shell
# sysrc inetd_enable="YES"
```
or, if you use separate files:
```
# echo "inetd_enable=\"YES\"">/usr/local/etc/rc.conf.d/inetd
```
* Finaly, launch inetd:
```shell
# service inetd start
```
## Use nginx as a "TLS Proxy"
* Compile the port with the stream module
* Activate it in configuration file, and create a stream section at the same level as the http section used for your virtualhosts:
```
load_module /usr/local/libexec/nginx/ngx_stream_module.so;
stream {
server {
listen 1965 ssl;
ssl_certificate /path/to/cert.pem;
ssl_certificate_key /path/to/privkey.pem;
ssl_trusted_certificate /path/to/fullchain.pem;
proxy_pass 127.0.0.1:11965;
}
}
```
# Usage
vger's vhost parameter is set (-v), so we'll have to create one or more directories within gemini's home directory, -i (directory index) is also set, so creating an index.gmi is not mandatory.
# Basic monitoring
The following miniamlistic script can be used to check for capsule availability in Nagios/Icinga/Shinken/Etc., assuming gnutls is installed:
```
#!/bin/sh
errorOutput=$(echo -n "gemini://$1/\r\n" | /path/to/gnutls-cli --port 1965 --tofu $1 2>&1 > /dev/null)
errorCode=$?
if [ $errorCode -gt 0 ]
then
echo "ERROR: ${errorOutput}"
return 2
else
echo "OK: capsule responding"
return 0
fi
```
Here we use "trust on first use authentication" (--tofu), so don't forget to manually launch gnutls-cli first. And if security is not your primary concern, you can use the more permissive --no-ca-verification flag instead.
# Greetings
Many many thanks to @solene@bsd.network for writing that wonderful little piece of software thas is vger, and @hucste@framapiaf.org for pointing it to me.