below are the steps to install the firewall named ConfigServer Security & Firewall which can be installed on any flavor of Linux. I have installed it on CentOS 7.
cd /usr/local/src
rm -fv csf.tgz
Download the package using
wget https://download.configserver.com/csf.tgz
extract it
tar -xzf csf.tgz
change directory
cd csf
install it
sh install.sh
To test if CSF will work in the server can be found by running,
perl /usr/local/csf/bin/csftest.pl
befor executing above command please check once is your system having perl installed or not
using command : perl -v
if not installed install it using below command
yum install perl
Now, open
vi /etc/csf/csf.conf
Edit the Testing Flag
TESTING = "0"
now run below command to start csf
csf -r
/etc/init.d/csf restart or
systemctl restart csf
some basic command which can be useful
to block IP with CSF
csf -d (Ip Address)
to allow IP with CSF
csf -a (Ip Address)
unblock an IP with CSF
csf -dr (Ip Address)
unblock temporarily blocked IP
csf -tr (Ip Address)
csf -s – Start firewall rules
csf -f – Flush/stop firewall rules
csf -r – Restart firewall rules
csf -x – Disable CSF
csf -e – Enable CSF
csf -c – Check for updates
csf -h – Show help screen
