firewall is always very important for the security of your system, specially if you are running a web server running very popular websites then firewall is the life of your server.
Previously I explained how to install CSF firewall, and here is the tutorial for APF which is another great firewall available.
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cd /usr/local/src/
wget http://www.rfxnetworks.com/downloads/apf-current.tar.gz
tar –zxvf apf–current.tar.gz; cd apf–*
sh ./install.sh
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