solution for a quick/robust/secure broadcast issue

[Ed Greshko]

On 10/14/14 12:19, bruce wrote:
> so essentially,
>
> the process would have each system in the sub net, report it's
> address/name to the external dyndns service, where it would be
> managed/returned as a subname, which would then populate the
> local/internal resolv.conf (or whatever is required) to allow the
> local services/users of the subnet the ability to access the boxes by
> the "subnames"...
>
> could work..

First, it may or may not be a subdomain....  But it would be a unique FQDN (Fully Qualified Domain Name).

Second, there is no need to alter any resolv.conf since the hostname is held in the standard DNS.

Just do some common name lookups....

host roger.dnsdynamic.com
host maria.dnsdynamic.com
host sam.dnsdynamic.com

You'll find the IP addresses associated with the hosts are not within the range owned by dnsdynamic.com.

Typically, this method is used for allowing for name resolution to route-able IP addresses so folks on the internet can assess you systems.

But, there is nothing wrong with sending internal non-route-able addresses so you could access internal systems by name without too much hassle.



-- 
If you can't laugh at yourself, others will gladly oblige.