How to set up the ufw firewall
sudo pacman -S ufw
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow samba
sudo ufw enable
If sudo ufw allow samba for example, does not work:
Create the file:
sudo nano /etc/ufw/applications.d/samba
Paste the content:
[Samba]
title=LanManager-like file and printer server for Unix
description=The Samba software suite is a collection of programs that implements the SMB/CIF$
ports=137,138/udp|139,445/tcp