> You know, I really have to write that article. People keep asking me about
> it. But basically you got it, yes. In my ppp.linkup I have:
>
> MYADDR:
>         # update the DNS with our new address
>         bg /usr/local/etc/update-dns MYADDR
>
>         # start MSS correction daemon
>         ! /usr/local/etc/tcpmssd.rc start INTERFACE
>
> "update-dns" above is a Perl script that updates the master DNS server for
> the zone.
> http://renaud.waldura.com/sw/update-dns.pl
>
> Note that the master DNS server has to be configured to allow dynamic
> updates for that zone, it's not magic (BTW I run bind 8, I don't know about
> djb-dns).
>
> Eg. in my case I want my DSL gateway to be named "ecoli.biohz.net". The
> master server for "biohz.net" is "ebola.biohz.net" and it is configured to
> allow dynamic updates to the zone "dyn.biohz.net". When ppp.linkup runs, it
> updates the record "ecoli.dyn.biohz.net" with the new IP address for the
> machine. And of course I set a low TTL (5 mins) on that record to propagate
> changes quickly. ("ecoli.biohz.net" is merely a CNAME to
> "ecoli.dyn.biohz.net" -- it's cleaner to keep a separate dynamic zone).
>
> You now have all the pieces; sorry for the lightning fast explanation, I'm
> gonna try to spend time writing that damn article. :)
>