Firewalld is the default firewall manager on CentOS
sudo systemctl status firewalld
# firewall-cmd --get-zones
block dmz drop external home internal nm-shared public trusted work
# firewall-cmd --get-default-zone
public
# firewall-cmd --get-active-zones
public
interfaces: eth1 eth0
# firewall-cmd --list-all
public (active)
target: default
icmp-block-inversion: no
interfaces: eth0 eth1
sources:
services: cockpit dhcpv6-client http https ssh
ports: 25/tcp 443/tcp 110/tcp 143/tcp 465/tcp 587/tcp 993/tcp 995/tcp
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules: