![]() SSH (port 22) and the ping/traceroute protocol (ICMP) are a good starting point. Remember the basic principle of all good firewalls – DENY ALL, ALLOW SOME.įirst, make a list of service ports you need open. Systemctl enable iptables systemctl start iptables Systemctl stop firewalld systemctl disable firewalld systemctl mask firewalld The following steps need to be followed by running the commands below.Ĭat ~/fwd_les > /etc/sysconfig/iptables We can bypass this, but in this case, we will just disable firewalld. Do not uninstall firewalld as fail2ban has a built-in dependency on firewalld. You can fix this by getting rid of firewalld and only using iptables rules. On Centos 7, the default firewall is firewalld and even though this is just a shell interface to configure iptables, it has its limits when it comes to applying advanced rules and customizing your firewall.
0 Comments
Leave a Reply. |