On CentOS 7, you can’t save iptables settings, how to fix this issue
[root@tutorialspots ~]# service iptables save The service command supports only basic LSB actions (start, stop, restart, try-restart, reload, force-reload, status). For other actions, please try to use systemctl. [root@tutorialspots ~]# systemctl save iptables Unknown operation 'save'.
Step 1: check service firewalld:
[root@tutorialspots ~]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: inactive (dead)
Docs: man:firewalld(1)
If this service is running, disable it
systemctl disable firewalld
Step 2: install iptables-service
yum install iptables-services
Result:
[root@tutorialspots ~]# yum install iptables-services Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.us.oneandone.net * epel: fedora-epel.mirror.lstn.net * extras: mirror.fileplanet.com * ius: dfw.mirror.rackspace.com * nux-dextop: mirror.li.nux.ro * remi-safe: repo1.dal.innoscale.net * updates: repos.dfw.quadranet.com Resolving Dependencies --> Running transaction check ---> Package iptables-services.x86_64 0:1.4.21-28.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: iptables-services x86_64 1.4.21-28.el7 base 52 k Transaction Summary ================================================================================ Install 1 Package Total download size: 52 k Installed size: 26 k Is this ok [y/d/N]: y Downloading packages: iptables-services-1.4.21-28.el7.x86_64.rpm | 52 kB 00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : iptables-services-1.4.21-28.el7.x86_64 1/1 Verifying : iptables-services-1.4.21-28.el7.x86_64 1/1 Installed: iptables-services.x86_64 0:1.4.21-28.el7 Complete!
Step 3:
systemctl enable iptables service iptables start
Result:
[root@tutorialspots ~]# systemctl enable iptables Created symlink from /etc/systemd/system/basic.target.wants/iptables.service to /usr/lib/systemd/system/iptables.service. [root@tutorialspots ~]# service iptables start Redirecting to /bin/systemctl start iptables.service
Done, now you can save iptables settings:
[root@tutorialspots ~]# service iptables save iptables: Saving firewall rules to /etc/sysconfig/iptables:[ OK ]
