Comandos para RealVNC Server 
sudo systemctl start vncserver-x11-serviced Inicia RealVNC Server
sudo systemctl enable vncserver-x11-serviced Inicia RealVNC Server en cada arranque
sudo systemctl stop vncserver-x11-serviced Detene RealVNC Server
sudo systemctl disable vncserver-x11-serviced Evita que RealVNC Server

sudo ufw allow 5900:5901/tcp (to permit VNC traffic)
sudo ufw allow 5903/tcp (to permit VNC traffic)

sudo ufw allow 22 (to permit SSH traffic)
sudo ufw allow 80 (to permit HTTP traffic)
sudo ufw deny 25/tcp (to NO permit port 25)

sudo systemctl stop ufw (desactivar servicio de firewall)
sudo systemctl start ufw (activar servicio de firewall)
sudo apt-get install -y ufw (instalar firewall)
sudo ufw default deny incoming (configurar firewall entradas por defecto)
sudo ufw default allow outgoing  (configurar firewall salidas por defecto)
sudo ufw disable (desactivar firewall en el boot)
sudo systemctl disable ufw (desactivar firewall en el boot)
sudo ufw enable (ctivar firewall en el boot)
sudo systemctl enable ufw (activar firewall en el boot)




SERIAL E4MM6-RXPPR-TYF2Z-AKAL8-Q4YLA

XCVJC-6BAEJ-W6FA4-G44MJ-PEXJA

8YMEC-BBH8W-TTD2V-6QNTQ-FG9QA

K5JKE-85D7M-F8K6B-UXD2A-7VYMA

7SFJ5-NLX3P-GQ3P6-X2VQC-PT89A

DNKUL-D28EY-P5GPZ-MR8WP-EX5WA

Z6F2Q-8LHTL-8PLR2-WY4LK-8KGSA