DHCP client and DYnamic DNS service auto-updating

[Carthik Sharma]

On 2/14/06, Darryl Clarke <smartssa at gmail.com> wrote:
> On 14/02/06, Carthik Sharma <carthik at gmail.com> wrote:
> > Hi Folks,
> >
> > I run a server at home, and would like to have a domain name assigned
> > to it so I can access it from work. Since I havea dynamic IP, I use
> > http://sh.nu to serve me as a dynamic dns server.
> >
> > I got a script from said website to enable me to auto-update the IP
> > address whenever it changes. The perl script's README says:
> >
> > "Execute dyn.pl: perl dyn.pl, or chmod +x dyn.pl and ./dyn.pl. You can also
> >    reference it in your /etc/dhcpc/dhcpcd-eth0.exe file (This probably varies by
> >    distro...YMMV) for automatic update when your IP address changes.
> > "
> >
> > However, since Ubuntu uses dhcp3, I cannot use the above instruction.
> >
> > Can some kind soul please guide a newbie in setting this script up so
> > that whenver the IP address assigned to me by the dhcp router, the
> > script (dyn.pl) can be called/executed by dhcp3's dhclient. I see some
> > directory called dhclient-enter-hooks.d in /etc/dhcp3/ I suspect I
> > will have to use a script placed here, but have no clue how to
> > proceed.
> >
> > A google search yields nothing, either.
>
> you can try putting a symlink to your updater (dyn.pl) in
> /etc/dhcp3/dhclient-exit-hooks.d/
>
> It should get executed when dhclient is finished getting your ip
> address.  But, that may not be best if you have multiple dhcp
> interfaces...
>
Is there a way I can test whether this method will work now? I cannot
force my ISP to give me a new IP, or can I? It would be bad if I
counted on this working, and then one fine day when I am at work, it
doesnt :)

Thanks for the tip Daryl - I was thinking it was entry hooks, thanks
for correcting me, and letting me know a symlink will do.

Carthik.
> --
> ~ Darryl  ~ smartssa at gmail.com
> ~ http://darrylclarke.com
>
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--
Ph.D. Candidate
University of Central Florida
Homepage: http://carthik.net