CentOS Firewall Usage _ server Other

This example describes the CentOS firewall usage. Share to everyone for your reference, specific as follows:

Shut down:

/etc/init.d/iptables stop

Open:

/etc/init.d/iptables start

Reboot:

/etc/init.d/iptables restart

View:

/etc/init.d/iptables status

Save:

/etc/init.d/iptables Save

Open port 8080:

/sbin/iptables-i input-p TCP--dport 8080-j ACCEPT

Delete-D

Rules will block packets from a specific IP range

# iptables-t filter-a input-s 123.456.789.0/24-j DROP

It is also easy to block all packets that flow to an attacker's IP address, a slightly different command:

# iptables-t filter-a output-d 123.456.789.0/24-j DROP

I hope this article will help you to CentOS server maintenance.