UFW

cat <<-'EXE'|sudo bash
apt-get update;echo
apt list -a --upgradable
apt-get install -y ufw nmap telnet
EXE

Allow

Name	Allow		Name	Allow
HTTP	sudo ufw allow http		RDP	sudo ufw allow 5900/tcp
OpenSSH	sudo ufw allow OpenSSH		MySQL	sudo ufw allow 3306/tcp
LXD Bridge	sudo ufw allow in on lxdbr0		PostgreSQL	sudo ufw allow 5432/tcp
LXD Bridge	sudo ufw route allow in on lxdbr0		Micro Services	sudo ufw allow 9000:9010/tcp
LXD Bridge	sudo ufw route allow out on lxdbr0		MinIO Object Storage	sudo ufw allow 9800:9801/tcp

Status

sudo systemctl status ufw sudo ufw status verbose sudo ufw enable

sudo ufw delete allow 3306 sudo ufw status numbered sudo ufw delete N

sudo ufw delete allow 9800:9801/tcp sudo ufw delete allow 9000:9010/tcp sudo ufw delete allow 3306/tcp

Playground

netstat -uap|grep nginx apt list --installed sudo ufw status netstat -lpn netstat -a	sudo ss -tulpn | grep LISTEN | grep resolve sudo ss -tulpn | grep LISTEN | grep minio sudo ss -tulpn | grep LISTEN | grep sshd sudo ss -tulwn | grep LISTEN sudo ss -tulpn | grep LISTEN	sudo lsof -i -P -n | grep LISTEN sudo ss -tulpn | grep LISTEN sudo ufw allow 'Nginx HTTP' sudo ufw app list sudo ufw status
sudo systemctl status ufw sudo apt-get install gufw sudo ufw status numbered sudo ufw status verbose sudo ufw disable sudo ufw enable sudo ufw status	nc -uv vpn.shahed.biz 1194 # udp nc -tv vpn.shahed.biz 80 # tcp nc -tv vpn.shahed.biz 53 # tcp sudo nmap -sT localhost # tcp sudo nmap -sU localhost # udp nc -uv localhost 1194 # udp nc -tv localhost 80 # tcp	sudo nmap -sU -sT -p U:1194,T:22,53,443 vpn.shahed.biz

References

UFW » Set Up on Ubuntu 22.04 UFW
PostgreSQL OpenVPN Minikube Podman Vagrant VSCode NodeJS Docker MAAS MinIO	Academia JavaEE Workspace in Ubuntu Linux Virtual Display for iPad Pro Ubuntu/Raspberry Pi Linux Containers Localtunnel Remmina ActiveMQ MySQL Nginx Qemu