Fedora 18 security questions.

William Mattison wcmattison at yahoo.com
Fri Mar 22 18:59:28 UTC 2013

chkrootkit and rkhunter installed.  Thank-you, Steve Stern.

nmap installed.  Thank-you, Rahul.

automatic updating is on.

The old system (10 years old) was probably infected early summer 2011.  Whether the spyware came from a bad web site via Firefox, or e-mail via yahoo e-mail (thru Firefox), or some other way, I don't know.  As far as I know, no files that I've knowingly created have been changed or lost.  But there's a definite uncanny correlation between e-mail that I write and spams and spoofs that I receive, both in timing and in content (judging by subject lines).  There is almost certainly at least some sort of keystroke logger on this dinosaur.  One of the main reasons for getting the new system is to solve this problem.  (I was long overdue for an upgrade too.)  Though the probability of infection is very small, I know from first hand experience it's not zero.  Better diligence and less laziness on my part can reduce that probability some, but I still would like something to detect and remove whatever slips through the cracks, and because I'm human.

I do not currently plan to connect to the new home system from the outside.  But I may someday connect to work computers, clouds, etc. from home via ssh, vpn, etc.  I will not be running a mail server, or any other kind of server, on my new system.


--- On Thu, 3/21/13, William Mattison <wcmattison at yahoo.com> wrote:

> From: William Mattison <wcmattison at yahoo.com>
> Subject: Fedora 18 security questions.
> To: users at lists.fedoraproject.org
> Date: Thursday, March 21, 2013, 10:31 AM
> I have a single desktop connected
> only to the internet.  It's dual-boot: Fedora 18 and
> windows 7 home.  In Fedora, it has more than one user
> id.
> I skimmed/read through the Fedora 18 security guide, and
> much of the Fedora 18 installation guide and the Fedora 18
> sys. admin. guide.  As best as I can tell, the only
> thing that I need to do is make sure the default firewall is
> active as per this section of the security guide:
> http://docs.fedoraproject.org/en-US/Fedora/18/html/Security_Guide/sect-Security_Guide-Firewalls-Basic_Firewall_Configuration.html
> and make sure the system stays up-to-date ("yum" seems to be
> doing that).  But my experience, understanding of
> computer security and sys. admin. are extremely poor and
> beginners level.  I'm assuming that what these guides
> say about multi-computer systems, LANs, WANs, servers, etc.
> does not apply to my system.  Any thoughts or
> suggestions?
> Windows has security essentials and malwarebytes scanning
> browser traffic to detect and block malware, and scanning
> the hard drive to find and remove malware.  What does
> Linux have corresponding to that?  I'm just about
> certain that my old Linux system is infected with working
> spyware.  I'd like to have something like security
> essentials, malwarebytes, etc. on my new Linux system.
> Thank-you in advance for your help.
> Bill.

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