Web lists-archives.com

Re: Naming of network devices - how to improve it in buster




]] Marc Haber 

> On Thu, 13 Jul 2017 19:37:52 +0200, Tollef Fog Heen <tfheen@xxxxxx>
> wrote:
> >]] Marc Haber 
> >> My finger memory will still type tcpdump -i eth0 before the brain can
> >> intervene ten years from now.
> >
> >In that particular case, I'll recommend you either leaving out the -i
> >switch completely or just doing `-i any`.  I find it's rare I care about
> >what interface traffic happens on.  YMMV, of course.
> 
> As a general paranoid type of guy, my foot nails curl up when I see a
> tcpdump command line without -i. I don't know where this originates
> from. Did tcpdump support the "listen on all interfaces" semantics
> without -i from the beginning?

I don't think it listens on all interfaces without -i, it just listens
on the first one (I think the first one with a configured address, which
in the trivial case is the one you want).  I don't know why it tickles
your spider sense to run it without -i.

-- 
Tollef Fog Heen
UNIX is user friendly, it's just picky about who its friends are