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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