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Re: get my ip address

tony wrote: 
> On 19/02/2019 16:10, Greg Wooledge wrote:
> > On Fri, Feb 15, 2019 at 11:11:29AM +0100, tony wrote:
> >> Debian 9. I need to read my IPv6 address into a python script.
> > 
> > Why?
> > 
> > <https://mywiki.wooledge.org/IpAddress> may offer some insight.
> > 
> Well, I'm sure you don't really want to know, and I don't think your
> blog covers my use case. Correct me if I'm wrong on either count.
> I have a network of IoTs consisting of 5 (I think) Paspberry Pis,
> monitoring various things, and periodically sending the data to my VPS.
> I need access to these hosts to manage them.
> The network supplier is Orange France (spit!) who supply a dynamic DNS
> on both IPv4 and IPv6. I need to access any of them. For some years, I
> have been using NAT over IPv4 with some success. I simply collect the
> router's address from the server using curl, compare it with the current
> DNS setting, and run nsupdate if different.
> Now, Orange (spit!) have recently discovered. IPv6, which makes
> management much easier, so I'm in the process of changing over to that
> protocol. Sadly the prefix is dynamic; ${deity} knows why. Each host
> address is set up from router advertisement, so I figure I only need to
> catch the host's current address, and set up the DNS accordingly. I'm
> successfully doing that manually, but, of course, that's not very
> satisfactory.

That sounds like a job for a dynamic dns client.

existing Debian packages:

ddclient (multiple backend services supported)
ddupdate (also supports multiple services, more plugin-oriented)
dyfi  (Finnish users only)
dyndns   (multiple services)
ez-ipupdate (multiple services)
ipcheck (dyndns protocol specific, but many services use it)
isc-dhcp-client-ddns  (adds dynamic dns to DHCP)

Don't reinvent the wheel, when it looks like it already has
seven versions already.