Re: DHCP & DNS

[Dr J Austin]

On Sun, 2007-10-21 at 12:16 -1000, Dave Burns wrote:
>  If you have 100 boxes, run DNS.  Sounds like you want (?) static
> host
>  names, might as well go for static IP too. Why not just make it all
>  static if they know each other and make assumptions about each other.
>  
>  I just happen to know of an office with about 100 PCs in it, using NIS
>  and NFS means they need a static relationship between machine and IP.
>  (Well, again, it could be some other way but it is already complicated
>  enough.) They have some hosts set with static IP, others get IP from
>  DHCP but it is always the same (DHCP server config knows what IP
>  belongs to what MAC address), and a small number of laptops  share a
>  pool of IPs and do not have predictable IP.
>  
>  Sounds to me like making everything totally dynamic is overkill in
>  your current situation, and would be skull-crackingly complicated with
>  100 PCs that think they know a lot about each other. Maybe there is
>  some applicable scale in between.
>  
>  Or just don't assume that any relationship is static, then everything
>  can be dynamic.
>  
>  What would really make you happy? Some sort of peer-to-peer DNS
>  without a server? Maybe you can use MAC addresses somehow?
>  Dave
>  
>  
>  On 10/21/07, zephod(a)cfl.rr.com <zephod(a)cfl.rr.com&gt; wrote:
>  >
>  > ---- Dave Burns <tburns(a)hawaii.edu&gt; wrote:
>  > > My lazy ignorant suggestion is to reconfigure the router so that you
>  > > know the IP of the two boxes will not change and then use /etc/hosts.
>  >
>  > Yes, I know I could do that. It's OK when there are only 2 boxes but what if I
> had a small office setup with, say, 100 PCs. It's not so practical then. I'm
> interested in finding out if there is another way to make this work.
>  >
>  > Steve
>   

Hi

I have found DDNS a great advantage as I am adding machines/virtual
machines/Fx Test releases quite frequently - it is a joy to use.

It is behind a routing firewall and is hopefully reasonably secure.

I attach my hints to myself below.
Please do not ask about the IP addresses used - its too long
a story!!!!!!!!!!

I also see that dnsmasq is suitable and is used by xen virtual machines?
man dnsmasq
"dnsmasq  is  a lightweight DNS, TFTP and DHCP server. It is intended to
provide coupled DNS and DHCP service to a LAN." .....


John