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Re: Get the external IP address from a Linux box




On Mon 28 May 2018 at 07:54:49 (-0400), Alan Greenberger wrote:
> On 2018-05-26, Pascal Hambourg <pascal@xxxxxxxxxxxxxxx> wrote:
> > Le 25/05/2018 à 02:17, Alan Greenberger a écrit :
> >> On 2018-05-24, André Rodier <andre@xxxxxxxxx> wrote:
> >>>
> >>> I am looking for a native package on Debian, that can give me the
> >>> external IP address of the machine.
> >> 
> >> Assuming you are looking for the public internet address of your router,
> >> you could try:
> >> /usr/sbin/arp -n
> >> and it may show up on a line with the HWadress of your router.
> >
> > Nope. That would just show the internal address of the router.
> >
> >
> You are mostly correct.  However, I have one machine on which the
> response to
> /usr/sbin/arp -n
> shows two lines with the HWaddress of the router, one with the internal
> address as you said and the other with the external address.  I have no
> idea what made arp see the external address.

Can we see what you're seeing (suitably mangled)?

Cheers,
David.