Question

how to write iptable block rule in the /etc/iptables/rules.v4?

  • Posted January 23, 2015

I can block some ip to link my vps in command line : sudo iptables -A INPUT -s [IP ADDRESS] -j DROP

how to write the iptable block rule in the /etc/iptables/rules.v4?

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sudo dpkg-reconfigure iptables-persistent can do .

root@change:~# sudo iptables -A INPUT -s 193.201.224.186 -j DROP root@change:~# cat /etc/iptables/rules.v4

Generated by iptables-save v1.4.14 on Fri Jan 23 12:42:00 2015

*filter :INPUT ACCEPT [415:61359] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [398:101696] COMMIT

Completed on Fri Jan 23 12:42:00 2015

root@change:~#

Why there is no 193.201.224.186 in the file /etc/iptables/rules.v4?

You can run the following command to save the current rules in /etc/iptables/rules.v4 and /etc/iptables/rules.v6:

sudo service iptables-persistent save

It may not be the easiest way / best way, but I use iptables-persistent to do so Once installed, launch sudo dpkg-reconfigure iptables-persistent to save your iptables