To clarify, many GNU/linux distros don't install a firewall in default
install. IN my opinion that is a bad choice, because while many people who
came from windows have no idea about SSH, most know about firewall and will
activate it if they have one. Also, I have already expressed why I think it
is necessary to have a firewall in your system.
Gufw is very easy to use and still allows you to manage everything you might
want to. So, good thing you followed that advice Ronald.
HTTPS Everywhere is a MUST. It will make sure that you use encryption on
thousands of websites, which will prevent anyone watching your connection
from knowing what you are doing. Note, they can still see what websites you
connect to. For example, using http one can see you used duckduckgo to search
for baby kittens for example. Using https one can see you connected to
duckduckgo but can't see the search you made. So, that is a lot safer. If you
want to hide which websites you visit and not be tracked online by ads and
such, use the Tor browser bundle (www.torproject.org)
Also, I would suggest Noscript addon for Abrowser. Even if you allow all
javascript it will prevent XSS attacks and such. So it's a must too. Add
adblock edge and adblock pop-up and you are good to go.
Other good software for you to use in GNU/Linux are:
-rkhunter (really easy to use and it takes a few minutes to run);
-chkrootkit;
-ClamTK (windows viruses don't affect GNU/Linux, but it allows to know if the
source you are using to get files online is as safe as you think);
-tiger;
-DenyHosts (prefer this over Fail2Ban);
Well, this is it. Remember, stay safe online ;)
