an that is why we need a firewall -> Re: When a yum update sets up an MTA ...

Miloslav Trmač mitr at
Mon Apr 28 17:04:00 UTC 2014

2014-04-28 18:59 GMT+02:00 Reindl Harald <h.reindl at>:

> Am 28.04.2014 18:52, schrieb Miloslav Trmač:
> > No no no no no.  If you want a firewall "integrated" /that/ way, you are
> really
> > better of uninstalling it or opening it up; it serves no purpose.
> no, even if that way is completly wrong it's better than no firewall
> as i have explained multiple times there may run software not from
> the Fedora repos which opens ports unintentionally from the users
> point of view and especially a user with no network expierience
> will not realize that - and yes that software matters because
> we are talking about a *operating system*
Well if the users' expectations were that the firewall doesn't "interfere"
with Fedora applications, why would they expect it to "interfere" with
non-Fedora applications?

the next thing is when it comes to malware opening ports
> there are two types of malware:
> * privilege escalation (you have lost)
> * crap try to open a unprivileged port with user permissions
The second case is a subset of the first one anyway :)

And doesn't every malware know to make an _outgoing_ connection to an IRC
server nowadays?  Stopping malware by blocking incoming connections is
fairly illusory IMHO.
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