[CVALE] Dynamic DNS

[Steven Hollingsworth]

On Tue, 2007-01-23 at 04:28 -0800, Rick Knight wrote:
> Joshua,
> 
> Problem is, I'm losing my DSL with static IPs and need to go to a lower 
> cost DSL with a single dynamic IP. It looks like I want to go with 
> dyndns and ddclient, but I'm not sure how it works, and what that setup 
> would look like.
> 
> Thanks,
> Rick Knight

Rick, I'd recommend only installing ddclient on one of the workstations
on your internal LAN, it will update the WAN address only, so creating
more than one instance of the program on the same network would just
double the login's and updates.

I assume you're going to have a hardware device for NAT. If the hardware
device isn't dyndns capable, then use _one_ of your internal machines to
update.

Since you have multiple services on multiple machines, I'd poke holes in
your NAT/router and re-direct smtp and http to the appropriate machines.
As far as the DNS is concerned, you'll have to switch to a dedicated dns
providor (or have one of your friends host DNS) because to register a
name server for a domain, the ip has to be static. If you get someone to
host your primary DNS, and setup and secondary with a free service
providor [0] Setup your previous dns entries as CNAME records [1]
pointing to your new dyndns address you should be golden and the outside
world won't know a difference. Set your MX record directly to the dyndns
address.

HTH,

~ stevo

[0] - http://twisted4life.com/index.php
[1] - most of this stuff goes against "best practices" but will do in a
situation like this. That'll do.
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