Re: [PLUG] tcpdump shows network traffic when no interface is connected

[Rich Freeman via plug <plug@lists.phillylinux.org>]

On Mon, Jun 5, 2023 at 9:03 AM Walt Mankowski via plug
<plug@lists.phillylinux.org> wrote:
> That said, while I'm no expert at reading these dumps either, modern
> OSs are designed with the assumption that they're online all the time,
> and the sites I saw all looked routine to me. For instance, it looks
> like it was hitting your distro's repos to check for security updates.
>

Plus, how does an application even know if it is online?  Or even an
OS?  With the myriad of network tunneling options out there, about the
only way you could reliably tell if you're able to reach a host is to
just try to do it.  There are a gazillion ways for a packet to get
from point A to point B and Linux supports just about all of them,
including solutions via userspace, serialized solutions, or even
AX.25.

-- 
Rich
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