What should I do if centos7 cannot find iptables?

centos7 cannot find the solution to iptables: 1. Write an iptables command to configure the firewall rules; 2. Save it through service iptables save; 3. Execute the service iptables restart command to restart.

The operating environment of this article: CentOS 7 system, Dell G3 computer.

What should I do if centos7 can’t find iptables?

Can’t find the iptables file under centos7?

Recently, to build an ftp service under centos7, follow the instructions Step by step, I found that the file etc/sysconfig/iptables did not exist, and then looked for a solution,

Solution:

1. Just write an iptables Command to configure a firewall rule. Such as: iptables -P OUTPUT ACCEPT.

[root@iZ23gx7o02aZ /]# cd /etc/sysconfig/ [root@iZ23gx7o02aZ sysconfig]# iptables -P OUTPUT ACCEPT

2. service iptables save to save.

[root@iZ23gx7o02aZ sysconfig]# service iptables save iptables: Saving firewall rules to /etc/sysconfig/iptables:[ OK ] [root@iZ23gx7o02aZ sysconfig]# ls atd firstboot iptables-config networking readonly-root sshd auditd grub irqbalance network-scripts rhn sysstat authconfig htcacheclean kdump ntpd rngd sysstat.ioconf cbq httpd kernel ntpdate rsyslog system-config-firewall clock i18n keyboard prelink sandbox system-config-firewall.old console init modules quota_nld saslauthd udev cpuspeed ip6tables-config netconsole raid-check selinux crond iptables network readahead smartmontools [root@iZ23gx7o02aZ sysconfig]#

3. Use the service iptables restart command to restart:

[root@iZ23gx7o02aZ sysconfig]# service iptables restart iptables: Setting chains to policy ACCEPT: filter [ OK ] iptables: Flushing firewall rules: [ OK ] iptables: Unloading modules: [ OK ] iptables: Applying firewall rules: [ OK ] [root@iZ23gx7o02aZ sysconfig]#

But when performing a save operation using service iptables save, it prompts that the save command does not exist, so I continue to look for a solution,

First, regardless of whether the firewall is disabled, use systemctl stop firewalld to turn off the firewall

Then use yum install iptables-services to install or update the service

Then use systemctl enable iptables to start iptables

Finally systemctl start iptables Open iptables

Done

Tryservice iptables save

Recommended tutorial: "centos tutorial"

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