How do I disable the iptables firewall in Fedora Linux?

Iptables command is used to set up, maintain, and inspect the tables of IP packet filter rules in the Linux kernel. You must run command as per your Linux distro.

How to stop and disable firewalld on CentOS Linux 7/RHEL v7 and newer only

Firewalld is a new firewall solution that has been part of CentOS 7.x+ or Red hat Enterprise Linux 7.x+ or the latest version of Fedora Linux. Type the following two commands as root user to disable and stop firewall permanently:
$ sudo systemctl disable firewalld
$ sudo systemctl stop firewalld
$ sudo systemctl status firewalld

How to stop and disable firewall on Ubuntu Linux server

Type the following command to disable UFW on Ubuntu Linux server:
$ sudo ufw disable

How to stop and disable firewall on older version of CentOS/RHEL version 6.x and earlier only

If you are using RHEL (Redhat), Fedora core or Cent os Linux just type following commands to disable the iptables firewall:
# service iptables save
# service iptables stop
# chkconfig iptables off
If you are using any other Linux distribution type the following command to clear up IPv4 based firewall rules:
# iptables -F
# iptables -X
# iptables -t nat -F
# iptables -t nat -X
# iptables -t mangle -F
# iptables -t mangle -X
# iptables -P INPUT ACCEPT
# iptables -P OUTPUT ACCEPT
You may need to put above rules in a shell script and execute the same. Also remove your iptables startup script from your network configuration file such as /etc/network/interfaces. Look for post-up directive.