Just create a reservation in your DHCP server so that the server always gets 
the same address.

Bob S


On Oct 27, 2015, at 12:45 , Richard Gaskin 
<ambassa...@fourthworld.com<mailto:ambassa...@fourthworld.com>> wrote:

Most of my servers have fixed IP addresses, but I'm about to add one to my home 
where the IP will be dynamic.

The most common solution for making servers with dynamic IPs findable is DDNS, 
and there are of course many free providers of such a service.

Put since this isn't a public server (just for testing and experimentation) 
I'll be the only user, and it occurs to me I could take a few minutes to craft 
a simple solution to know the server's current IP by using a CGI at one of my 
sites hosted with real DNS in conjunction with an auto-run app on the server to 
call it similar to what many DDNS services use.

I'm inclined to do that only because I like tinkering, but I thought I'd check 
in here to see if this very specific use case was something others might have a 
need for.  If so, I might get around to documenting the CGI and sharing it, but 
since most folks just use DDNS I'd guess this 302-based workaround is probably 
too use-case specific to be of interest.  If I'm wrong let me know and that'll 
motivate me to get around to documenting it that much sooner.

--
Richard Gaskin
Fourth World Systems
Software Design and Development for the Desktop, Mobile, and the Web

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