On Tue, Feb 19, 2019 at 11:36:49AM -0500, Dan Ritter wrote: > tony wrote: > > 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.
> That sounds like a job for a dynamic dns client. Agreed. > 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) And the specific case of dynamic DNS updates is definitely covered on the wiki page that I linked (https://mywiki.wooledge.org/IpAddress). It even has sample code for Debian 8. If you need to use a special python dynamic DNS client for some reason, that's fine. Just hook it from the dhclient-exit-hooks.d directory and let it use the new_ip_address environment variable. The example is right there on the wiki page. Just replace /usr/local/sbin/dync with your python program (assuming it takes the IP address on the argument list). Oh... wait, you said IPv6 in the original message, right? Ugh. I don't know IPv6 myself, but fortunately we can look that up... um, somewhere! wooledg:~$ man dhclient-script | grep 6 $new_dhcp6_server_id. The options that the client explicitly requested ... OK, apparently not *there*. But looking through /sbin/dhclient-script itself, there appear to be the following variables: new_ip6_address new_dhcp6_name_servers new_dhcp5_domain_search Maybe those will help? Give it a shot. Or wait for someone who knows IPv6 to chime in.
