Re: DNS serrver update via client?

Buckaroo_Banzi wrote: 
The problem is the project concept represents a LINUX "plug-and-play"
solution where a number of clients will know about each other through
DNS lookup and this is possible because each client will register
itself to a DNS server on initilization.

So the concept, if I understand it correctly, is that DHCP can be a DNS
server where it assigns the IP addresses to the clients. Does that mean
that it has all the functionality of a DNS server? I will still need
the ability to resolve external names.



The DNS system is a hierarchial tree of servers.
If a server cannot resolve an address, it will
ask the next server for it, so the server in the
DHCP box gives the local and cached names directly,
but for other names it will ask the next server
(here very probably the ISP's server).

This is a Linux group, so let's assume that the server
is a Linux box with a DHCP daemon.

You need to install a DNS server (BIND, DJBDNS or others)
and set it up to update the local names when a DHCP
lease is given. Also, the DNS must point to the ISP's
server for upstream resolution.

The DHCP server has to be set up so that the clients
point to the DNS server in the server box.

The exact instructions depend on the DHCP and DNS
packages selected, see respective manuals.

You have to catalogue the clients in the server
somehow (based on MAC address) to keep the name
of a client the same on different leases. This
leads to the thought of fixed names and addresses
set up at the DHCP configuration, and fixed DNS
naming in the /etc/hosts file in the server.
A very simple DNS server (dnsmasq) can serve the
names from the upstream server and the /etc/hosts file.

--

Tauno Voipio
tauno voipio (at) iki fi
.

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