To turn on UFW,
sudo ufw allow 22
sudo ufw enable
sudo ufw status
sudo systemctl enable ufw
sudo systemctl start ufw
sudo ufw allow 22
sudo ufw allow Samba
sudo ufw allow syncthing
sudo ufw allow syncthing-gui
for enabling wifi bridging in ubuntu
sudo ufw allow to any port 53
sudo ufw allow to any port 67 proto udp
sudo ufw allow to any port 68 proto udp
https://askubuntu.com/questions/580433/how-can-i-allow-ap-hotspot-in-ufw-ubuntu-14-04
sudo ufw allow 51820/udp
sudo ufw allow 1701/tcp
sudo ufw allow 9901/tcp
sudo ufw allow 50000