On Fri, Oct 15, 2010 at 7:57 AM, Boniforti Flavio <flavio AT piramide DOT ch> 
wrote:
> Hello there.
>
> I'm struggling to find a definitive solution to my troubles: I'm backing
> up servers which are on remote DSL connections. Just a few of them have
> fixed IPs, thus I had to use DDNS services for the other ones. Because
> of the propagation delay when an IP changes (and the related DDNS entry
> too), I wanted to get to a better way: any clues/suggestions?

Here's a completely off the wall solution that I'm not entirely sure
will work...

Have the client determine it's own IP and then upload a file to your
BackupPC server (ftp, scp, or other method). Then setup BackupPC to
run a shell script (or python, perl, etc) prior to starting the backup
that will process the uploaded files and make updates to your
/etc/hosts file.

For this to work I'm assuming that updates to /etc/hosts are work
immediately and are not just check/cached on boot.

Complicated but it would remove any dependency on DNS...

Richard

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