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 From:  Ugo Bellavance <ugob at camo dash route dot com>
 To:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: Feature to email when IP changes
 Date:  Mon, 18 Apr 2005 17:08:26 -0400
Adam Gibson wrote:
> Ugo Bellavance wrote:
>> Adam Gibson wrote:
>>> Ugo Bellavance wrote:
>>>> Adam Gibson wrote:
>>>>> Any chance to get some kind of email sent out to let administrators 
>>>>> know when m0n0wall's IP changes?
>>>>> It could be as simple as:
> ...
>> Wouldn't be simpler to use a mydyndns service and have your DNS set 
>> automatically?
> Previously I mentioned that "Sometimes some external things need to be 
> changed(not DNS related) or monitored when an IP changes"

Oups... I missed the 'not DNS related' part, sorry.

> I already have a plan for DNS to get updated using the RFC 2136 dynamic 
> DNS feature of m0n0wall.  I just need to be emailed so that I can do 
> some manual things which cannot be automated and have nothing to do with 
> DNS.
> If nobody else is interested in such a feature and because of that it 
> would never be implemented I could setup a script to query DNS every so 
> often to see when it changes but it would be nice to have the m0n0wall 
> do it itself instead of relying on a server somewhere to monitor it.  I 
> would think others might find it useful to be notified when their 
> m0n0wall changes IP addresses.
> I used to do this with my previous iptables system I had and it proved 
> to be very useful when all your systems send you emails when their ISP 
> given IP address changes.

You could also run a script in a cronjob that checks the IP address in 
the output of ifconfig, and compare it to the previous run... just a