On 4/25/25 7:02 PM, George N. White III wrote:
On Fri, Apr 25, 2025 at 9:38 PM home user via users
<users@lists.fedoraproject.org> wrote:
(Fedora-42; stand-alone workstation)
This is a totally new Fedora install on a stand-alone workstation,
done
today. It is not a part of a LAN or WAN or any other home or office
network.
Please describe how the system is connected to the internet. Does
your system get an IPv4 address
or IPv6?
The workstation is connected to a modem via an ethernet cable. The modem
connects to the internet service provider (comcast) via common co-ax(?)
cable.
I lost ***all*** my notes. How do I determine this workstation's IP
address (presumably set by comcast, my internet service provider)?
It is not dual-boot.
I do need for Firefox, Thunderbird, and dnf to be able to interact
with
the "outside world" appropriately. I do occasionally need to be
able to
download or upload things.
Beyond those (and maybe other appropriate things that don't at the
moment come to mind), I do not want anyone or anything to be able
to get
into this workstation. For example, no "ssh", "scp", "rlogin".
I gather from the Fedora docs that I should use firewalld or
firewalld-config. I have both. But Fedora docs does not give me
enough
detail. I am not an IT professional. What specifically should I
do to
keep unwanted people and things out?
Many "home" internet connection hardware does network address
translation (NAT) to a non-routable
address used by attached devices
<https://en.wikipedia.org/wiki/Network_address_translation>.
Vendors support NAT because it allows one IPv4 address to be used by
all the devices on each
customer network, but it also prevents external sites from connecting
to the devices on the
customer network.
With NAT, connections to external systems must be initiated from your
system, but many web sites
use multiple external sites for elements of the page you see. There
is always a risk that one of these
sites has been hacked and is serving malware or stealing personal
information. Firefox on Fedora
includes some measures to block or mitigate such attacks.
--
George N. White III
Thank-you, George.
--
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