UFW
cat <<-'EXE'|sudo bash
apt-get update;echo
apt list -a --upgradable
apt-get install -y ufw nmap telnet
EXE
sudo ufw allow http
sudo ufw allow OpenSSH
sudo ufw allow in on lxdbr0
sudo ufw route allow in on lxdbr0
sudo ufw route allow out on lxdbr0
sudo ufw status verbose
sudo systemctl status ufw
sudo ufw enable
sudo ufw allow 5900/tcp
sudo ufw status verbose
sudo ufw allow http
sudo ufw allow OpenSSH
sudo ufw allow 5900/tcp
ufw status
ufw status verbose
systemctl status ufw
Playground
netstat -uap|grep nginx
apt list --installed
sudo ufw status
netstat -lpn
netstat -a
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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
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sudo lsof -i -P -n | grep LISTEN
sudo ss -tulpn | grep LISTEN
sudo ufw allow 'Nginx HTTP'
sudo ufw app list
sudo ufw status
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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
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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
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sudo nmap -sU -sT -p U:1194,T:22,53,443 vpn.shahed.biz
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References
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