CSF firewall tutorial

[Aerosol]

1 SSH into your server with the root user

2 If you are in a directory already, use cd to go back to your home directory. In the root users case, it'll be /root

3 Use the command wget http://configserver.com/free/csf.tgz

4 Type tar -zxvf csf.tgz

5 Type cd csf

6 Type ./install.sh

You now have CSF installed.

It would take me far too long to go through all of its features. It's basically a front end to iptables. Pretty straight forward to edit

Notable features would probably be

-Blocking incoming ping

-Blocking countries

-Sending emails when someone who is not in the ignore list logs into ssh (Ignore list is /etc/csf/csf.ignore)

There are tons of features

For maximum security, only allow incoming/outgoing ports that you need.