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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 14:22:12 -0400
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:
> 
> ...
> 
>>
>>
>> Are you talking about a WAN dynamic IP address?
> 
> 
> Yes.
> 
> I noticed that m0n0wall stores the IP address to a file and uses it to 
> know when the IP address actually changes to do some things.  It would 
> be nice to use that same logic to optionally send an email to a specific 
> address when the IP changes.  The file would need to be stored across 
> reboots though otherwise an email would have to be sent when the device 
> reboots and gets a new IP since it would not have the last IP address to 
> compare against.  I have a feeling that file is lost upon reboots.

Wouldn't be simpler to use a mydyndns service and have your DNS set 
automatically?