The iptables file cannot be found in/etc/sysconfig /.

The iptables file cannot be found in/etc/sysconfig /.

I wanted to make some firewall policies. All firewall policies are written in the/etc/sysconfig/iptables file. But I don't have this file either.

[root@iZ23gx7o02aZ /]# cd /etc/sysconfig/[root@iZ23gx7o02aZ sysconfig]# lsatd         firstboot         irqbalance  network-scripts  rhn            sysstatauditd      grub              kdump       ntpd             rngd           sysstat.ioconfauthconfig  htcacheclean      kernel      ntpdate          rsyslog        system-config-firewallcbq         httpd             keyboard    prelink          sandbox        system-config-firewall.oldclock       i18n              modules     quota_nld        saslauthd      udevconsole     init              netconsole  raid-check       selinuxcpuspeed    ip6tables-config  network     readahead        smartmontoolscrond       iptables-config   networking  readonly-root    sshd[root@iZ23gx7o02aZ sysconfig]# 

Solution:

1. Write an iptables command to configure firewall rules. For example, iptables-p output accept.

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

2. save service iptables.

[root@iZ23gx7o02aZ sysconfig]# service iptables saveiptables: Saving firewall rules to /etc/sysconfig/iptables:[ OK ][root@iZ23gx7o02aZ sysconfig]# lsatd firstboot iptables-config networking readonly-root sshdauditd grub irqbalance network-scripts rhn sysstatauthconfig htcacheclean kdump ntpd rngd sysstat.ioconfcbq httpd kernel ntpdate rsyslog system-config-firewallclock i18n keyboard prelink sandbox system-config-firewall.oldconsole init modules quota_nld saslauthd udevcpuspeed ip6tables-config netconsole raid-check selinuxcrond iptables network readahead smartmontools[root@iZ23gx7o02aZ sysconfig]# 

3. restart the service iptables restart command:

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