Re: mysterious/suspicious internet activity.

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On Mon, 2020-11-30 at 17:57 +0000, home user wrote:
> In ksysguard, I've been noticing internet activity that I can't
> explain.  This has been going on for weeks, and it's making me
> uncomfortable.

Only one of your image links loaded for me, the browser just spent ages
with the spinning circle.  This one worked:

https://drive.google.com/file/d/1AyZDRvcKYHYypNSU6AF9Fh34rh_l3q2J/view


There's a whole pile of things that could be network activity, but you
really want to do something like "netstat -atuevp" to see what, where,
and who is involved in network traffic.

> * as far as I know, nothing else that uses the internet had been
> launched since powering up

Run "gnome-session-properties" and see what's enabled.  There's often
more than you need preconfigured to start, and turning off some junk
can make logins quicker to complete.

Do you have apps that show you the weather, calendar appointments?

Is the clock using NTP to correct itself?  Which is a good idea, by the
way.  At start-up it does a bit of checking, then it gathers data less
often the longer it's running.  Chrony is probably simpler, traffic-
wise, but I found it unsuitable for machines that are left running.

You probably have Avahi/ZeroConf/Bonjour running, which looks for
printers and other internet-of-things on your network.  Likewise, if
you have IOT gizmos at home, they're probably probing your computer,
too.
 
-- 
 
uname -rsvp
Linux 3.10.0-1160.6.1.el7.x86_64 #1 SMP Tue Nov 17 13:59:11 UTC 2020 x86_64
 
Boilerplate:  All unexpected mail to my mailbox is automatically deleted.
I will only get to see the messages that are posted to the mailing list.
 
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