-2

Does it any good for security, if so why developers put it in, in the first place? I just started learning about iptables and i wonder why there is such an option? What does it do?

closed as unclear what you're asking by muru, Jeff Schaller, Stephen Kitt, dr01, Raphael Ahrens Jan 3 '16 at 15:36

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

0

Well, I think you can answer your first question by yourself by comparing the security with and without blocking incoming connections from any ip address. Yes.

Now, you have the possibility of dropping or blocking connections. If you set the behaviour on dropping, when someone tries to connect (s)he wont notice you even exist. If you set it on blocking, the person will see that it's not allowed.

If you want to read a bit more, I personally like geek-guide page or the archlinux wiki page.

Not the answer you're looking for? Browse other questions tagged or ask your own question.