Csf firewall to effectively prevent the use of small-scale DDOS

Csf test is working properly

Update:upgrade Ubuntu 20.04 LTS Rear,csf is not working,Prompt that iptables cannot be found:

This is because Ubuntu 20.04 LTS Changed iptables Related command position,The csf script is not updated in time。[……]

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Under Ubuntu more simple firewall Uncomplicated Firewall

Gufw_10.04.4

we all know,Among Linux system has a very fast hardware firewall is called iptables,It can do far exceeds the scope of the firewall, but ......,usually,We only used it as a firewall to use。

but,If you just want a port policy,That does not seem to need to face iptables That lengthy configuration commands。Now,I'll introduce you to the other a more[……]

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