I need a firewall because I was decade long user of internet security suites on windows. I am not a professional of networks or anything but a student who just needs to block unblock running applications... GUFW a simple firewall was a good option but isnt available on Fedora nor any gui firewall & am frustrated over searching it for 2days... I checked Vuurmuur its powerful but for noobs & if configured wrongly its a great mess (even their documentation forewarns that). Similarly SeLinux is not a firewall
A firewall controls the flow of traffic to and from a computer to the network. SELinux can confine access of programs within a computer and hence can be conceptually thought of a internal firewall between programs
I think its just a way to protect core filesystem nothing more than that ... So what are my options, please suggest me something some resource that is understandable to a starter & if somehow bugged willn't have irreversible consequences.
Further just tell me if I want to reject in/out traffic for the address(s) containing keyword wolfram e.g pk.server.wolfram or wolfram-mathematica.com how would I do that in iptables or somehow...& if I want to block intenet for application /opt/telepath-gabble how would I achieve that