• IPv4: 88.99.87.88
• IPv6: 2a01:4f8:c17:b5ca::1
• create admin user, change ssh port, deny root to logon only allow admi
• make admin sudo and exec rights: usermod -a -G sudo admin && chsh -s /bin/bash admin
• Logon with admin:

  sudo apt update && sudo apt upgrade -y
  sudo apt install -y git htop mc vnstat vnstati
  sudo apt install ufw
  sudo ufw allow 10022
  sudo ufw enable
  sudo ufw status verbose
 

* [Install nginx and adjust Firewall](https://www.digitalocean.com/community/tutorials/how-to-install-nginx-on-debian-10)

  sudo apt update
  sudo apt install nginx
  sudo ufw app list
  sudo ufw allow 'Nginx HTTP'
  sudo ufw allow 'Nginx HTTPS'
 

• check Nginx+ firewall

  sudo ufw status
  systemctl status nginx
  ip addr show eth0 | grep inet | awk '{ print $2; }' | sed 's/\/.*$//'
 

• Test: Logon via Browser to IP

• Configure Nginx

  cd /etc/nginx/sites-available
  sudo nano matrix.sternenlabor.de
  sudo nano chat.sternenlabor.de
  cd /etc/nginx/sites-enabled
  sudo ln -s ../sites-available/matrix.sternenlabor.de matrix.sternenlabor.de
  sudo ln -s ../sites-available/chat.sternenlabor.de chat.sternenlabor.de
  service nginx reload

 

• Install and configure Matrix

    sudo apt install -y lsb-release wget apt-transport-https
    sudo wget -O /usr/share/keyrings/matrix-org-archive-keyring.gpg https://packages.matrix.org/debian/matrix-org-archive-keyring.gpg
    echo "deb [signed-by=/usr/share/keyrings/matrix-org-archive-keyring.gpg] https://packages.matrix.org/debian/ $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/matrix-org.list
    sudo apt update
    sudo apt install -y matrix-synapse-py3      # Server name matrix.sternenlabor.de
    sudo apt install -y python3-certbot-nginx
    sudo certbot --nginx -d matrix.sternenlabor.de -m kontakt@sternenlabor.de
    cd /etc/matrix-synapse/
    sudo nano homeserver.yaml
      enable_registration: true  
      domain: matrix.sternenlabor.de    
    sudo systemctl restart matrix-synapse
 

• Install & Configure Element

   
  cd /var/www
  sudo mkdir chat.sternenlabor.de
  cd /var/www/chat.sternenlabor.de
  sudo wget https://github.com/vector-im/element-web/releases/download/v1.7.22/element-v1.7.22.tar.gz
  sudo tar -zxvf element-v1.7.22.tar.gz
  sudo ln -s element-v1.7.22 element
  sudo certbot --nginx -d chat.sternenlabor.de -m kontakt@sternenlabor.de
  cd /var/www/chat.sternenlabor.de/element
  sudo cp config.sample.json config.json
  sudo nano config.json
      "default_server_config": {
        "m.homeserver": {
            "base_url": "https://matrix.sternenlabor.de",                                                                                         "server_name": "sternenlabor.de"                                                                                                                                                        },
  service nginx reload
 

• Postgres installation and configuration

 
  sudo apt install -y postgresql libpq5
  sudo -u postgres bash   # --> **PW: ******
  psql
    CREATE DATABASE synapse ENCODING 'UTF8'  LC_COLLATE='C' LC_CTYPE='C' template=template0  OWNER synapse_user;
 

• Test
  • List databases: `\l` - ok
  • Connect to database `\c synapse` -ok
  • List tables `\dt` - ok, no tables yet
• find `hba_file.conf`
  • `sudo -u postgres bash`
  • `psql -t -P format=unaligned -c 'show hba_file';`
  • –> `/etc/postgresql/11/main/pg_hba.conf`
• `nano /etc/postgresql/11/main/pg_hba.conf`
  • add: `host synapse synapse_user ::1/128 md5`
• sudo nano /etc/matrix-synapse/homeserver.yaml

database:

      name: psycopg2
      args:
        user: synapse_user
        password: ************
        database: synapse
        host: localhost
        cp_min: 5
        cp_max: 10
* sudo systemctl restart matrix-synapse    


  + sudo ufw allow 8448
+ sudo nano /var/www/chat.sternenlabor.de/element/config.json
   "disable_custom_urls": true,    
   "brand": "Sternenlabor Matrix",   
   "defaultCountryCode": "DE",  
   "roomDirectory": {
      "servers": [
          "matrix.sternenlabor.de",
          "matrix.eigenbaukombinat.de",
          "matrix.fablabchemnitz.de",
          "matrix.org"
      ]
   "jitsi": {
      "preferredDomain": "videochat.sternenlabor.de"    
+ sudo service nginx reload
+ sudo nano /etc/matrix-synapse/homeserver.yaml
  enable_group_creation = true

+ Metrics

+ configure Synapse
+ `sudo nano /etc/matrix-synapse/homeserver.yaml` --> add listener and enable metrics
  enable_metrics: true  
  listeners:
    - type: metrics
      port: 9000
      bind_addresses:
        - '0.0.0.0'
+ `systemctl restart matrix-synapse`
+ sudo ufw allow 9000     # -> metrics port
+ Test: http://88.99.87.88:9000/_synapse/metrics

+ ToDo next: 
  + Metrics Aktivieren
  + Federation
  + Branding 
  + Finuetuning Matrix, Element, Postgress
  + Security: Captcha, Fail2Ban
  + Prometheus auf dedizierter Server oder später auf CloudServer
  + Idee für später: LoadBalancer einrichten und DB auf Volume verschieben,