Who knows what those lines are?

Question

Programming

What are these lines, why are they? Do they need to be registered in the VPS console?

iptables -A INPUT -p udp -m udp --dport 7777 -j DROP
iptables -I INPUT -p udp --dport 7777 -m state --state NEW -m recent --set
iptables -I INPUT -p udp --dport 7777 -m state --state NEW -m recent --update --seconds 9 --hitcount 7 -j DROP

Answer 1

https://ru.wikipedia.org/wiki/Iptables
linuxcommand.org/man_pages/iptables8.html

Answer 2

There is no point in VPS.
On this port, the popular Windows Trojan / backdoor used to be spinning, so they began to shove it into all manuals for gateways.

Answer 3

As far as I remember, Zhikveri's animate does not know how to animate colors, usually they use the plug- in

Answer 4

$(document).ready(function() {
var forAnim = $("#third");
  forAnim.animate({backgroundColor: '#000000'}, 500);
});

either like this:

$(document).ready(function() {
var forAnim = $("#third");
  forAnim.animate({'background-color': '#000000'}, 500);
});