Question: How to stop and disable firewalld (iptables in earlier version) in CentOS/RHEL 8?
The iptables service is replaced with firewalld service in CentOS/RHEL 7. The command “iptables -L” will list the set of rules that are in place on node.
# iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED ACCEPT all -- anywhere anywhere INPUT_direct all -- anywhere anywhere INPUT_ZONES_SOURCE all -- anywhere anywhere INPUT_ZONES all -- anywhere anywhere ACCEPT icmp -- anywhere anywhere REJECT all -- anywhere anywhere reject-with icmp-host-prohibited Chain FORWARD (policy ACCEPT) target prot opt source destination DOCKER-ISOLATION all -- anywhere anywhere DOCKER all -- anywhere anywhere ....
The systemctl command will list all the services that are running on the node. On verifying the service “iptables” does not revert any output back. The service iptables is replaced by name “firewalld”
# systemctl | grep -i iptables # systemctl | grep -i firewall firewalld.service loaded active running firewalld - dynamic firewall daemon
To check the status of the service can use the below command:
# systemctl status firewalld ● firewalld.service - firewalld - dynamic firewall daemon Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled) Active: active (running) since Wed 2016-06-08 22:24:56 IST; 19s ago Main PID: 18060 (firewalld) CGroup: /system.slice/firewalld.service └─18060 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid Jun 08 22:24:56 geeklab-docker-TD systemd[1]: Starting firewalld - dynamic firewall daemon... Jun 08 22:24:56 geeklab-docker-TD systemd[1]: Started firewalld - dynamic firewall daemon.
Service can stopped by the command below and can recheck the status:
# systemctl stop firewalld # systemctl status firewalld ● firewalld.service - firewalld - dynamic firewall daemon Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled) Active: inactive (dead) since Wed 2016-06-08 22:25:50 IST; 2s ago Process: 18060 ExecStart=/usr/sbin/firewalld --nofork --nopid $FIREWALLD_ARGS (code=exited, status=0/SUCCESS) Main PID: 18060 (code=exited, status=0/SUCCESS) Jun 08 22:24:56 geeklab-docker-TD systemd[1]: Starting firewalld - dynamic firewall daemon... Jun 08 22:24:56 geeklab-docker-TD systemd[1]: Started firewalld - dynamic firewall daemon. Jun 08 22:24:57 geeklab-docker-TD firewalld[18060]: 2016-06-08 22:24:57 ERROR: COMMAND_FAILED: '/sbin/iptables -w2 -t nat -C...name. Jun 08 22:24:57 geeklab-docker-TD firewalld[18060]: 2016-06-08 22:24:57 ERROR: COMMAND_FAILED: '/sbin/iptables -w2 -t nat -C...in?). Jun 08 22:24:57 geeklab-docker-TD firewalld[18060]: 2016-06-08 22:24:57 ERROR: COMMAND_FAILED: '/sbin/iptables -w2 -t nat -I...name. Jun 08 22:25:49 geeklab-docker-TD systemd[1]: Stopping firewalld - dynamic firewall daemon... Jun 08 22:25:50 geeklab-docker-TD systemd[1]: Stopped firewalld - dynamic firewall daemon.
To disable the service on next boot (chkconfig in OL6 and prior), can execute the below command. By executing the related file links are removed and will not be referred next time.
# systemctl status firewalld firewalld.service - firewalld - dynamic firewall daemon Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled) Active: active (running) since Fri 2016-05-13 10:54:39 EDT; 1 months 3 days ago Main PID: 582 (firewalld) CGroup: /system.slice/firewalld.service └─582 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid May 13 10:54:39 geeklab systemd[1]: Started firewalld - dynamic firewall daemon.
# systemctl disable firewalld rm '/etc/systemd/system/basic.target.wants/firewalld.service' rm '/etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service' [root@geeklab ~]# systemctl status firewalld firewalld.service - firewalld - dynamic firewall daemon Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled) Active: active (running) since Fri 2016-05-13 10:54:39 EDT; 1 months 3 days ago Main PID: 582 (firewalld) CGroup: /system.slice/firewalld.service └─582 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid May 13 10:54:39 geeklab systemd[1]: Started firewalld - dynamic firewall daemon.