I thought of blocking all my system ports and allow only http(s) ports. Because I am not going to use any others ports except http(s).
With IPkungfu tool, it is possible to block all the ports and allow the necessary ports.
# apt-get install ipkungfu
1) /etc/ipkungfu/ipkungfu.conf //Change the firewall settings
2) /etc/ipkungfu/services.conf //Change the Port settings
Syntax: ServiceName: ServicePort:Protocol[:ACCEPT]
http:80:tcp:ACCEPT //Allow Port
ftp:21:tcp //Block Port
# ipkungfu --test
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