Check to see if there is a firewall on Linux.
To check if there is a firewall on Linux, you can use the following command:
- Check the firewall status:
sudo systemctl status firewalld # for CentOS/RHEL
sudo service ufw status # for Ubuntu/Debian
If the firewall is shown to be running, it means there is a firewall.
- View firewall rules.
sudo iptables -L
If there are output rules, it means there is a firewall.
Please note that different Linux distributions may use different firewall tools, so commands may vary. The above commands are applicable to CentOS/RHEL and Ubuntu/Debian, two common Linux distributions.
