Depending on the firewall software that is installed on Linux system, to disable the firewall services you will have to work with iptables, ufw (Uncomplicated Firewall) or firewalld.
“firewalld” is a firewall management tool for Linux systems. It provides a dynamic firewall solution that can be controlled and configured through a command-line interface or a graphical user interface. It is designed to be easy to use and provide a more flexible way to manage the firewall rules compared to traditional firewall solutions such as iptables.
“firewalld” uses a concept of “zones” to define different levels of trust for network connections. Each zone can have its own set of firewall rules and can be assigned to a network interface. This allows you to create different security levels for different types of network connections and make it easy to change the firewall rules for specific network interfaces.
It also supports “services” and “ports” which allow you to easily configure the firewall rules for common services and ports such as HTTP, HTTPS, SSH, etc.
In this article, we will see commands related to disabling firewalld.
TO CHECK THE FIREWALL STATUS
# service firewalld status
TO STOP FIREWALL SERVICES
# service firewalld stop
TO CHECK STATUS AGAIN
# service firewalld status
TO STOP FIREWALLD
# systemctl stop firewalld
TO PREVENT FIREWALLD FROM STARTING AUTOMATICALLY AT SYSTEM START
# systemctl disable firewalld
TO MAKE SURE FIREWALLD IS NOT STARTED BY ACCESSING THE FIREWALLD D-BUS INTERFACE AND ALSO IF OTHER SERVICES REQUIRE FIREWALLD:
# systemctl mask firewalld Created symlink from /etc/systemd/system/firewalld.service to /dev/null.
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