ronf at timeheart.net
Fri Jan 25 18:45:04 GMT 2008
rance at frontiernet.net wrote:
> Quoting Heath Woodson <heathwoodson at gmail.com>:
>> Setting this up for the first time and I have a simple question but it
>> clearly answered anywhere. I want to assign ips with DHCP in a static
>> can I just use the /etc/host file on the machine running dnsmasq to do
>> and uncomment this line
>> # Enable the address given for "judge" in /etc/hosts
>> # to be given to a machine presenting the name "judge" when
>> # it asks for a DHCP lease.
>> or is it better to use the MAC address lines presented like below?
>> # Always allocate the host with ethernet address 11:22:33:44:55:66
>> # The IP address 192.168.0.60
>> and will either of these work without uncommenting the range line
>> sounds like it wont work without this but i dont want any dynamically
>> assigned IPS..)
>> # Uncomment this to enable the integrated DHCP server, you need
>> # to supply the range of addresses available for lease and optionally
>> # a lease time. If you have more than one network, you will need to
>> # repeat this for each network on which you want to supply DHCP
>> # service.
>> thanks for your help in advance
> Just a word of warning, NOT EVERY dhcp client sends a hostname by
> default, if you have a dhcp configuration based on hostname, then it is
> essential that the dhcp clients all send hostnames in the request packet.
> Windows by default does this, but linux usually doesn't.
> On linux boxes you need to edit/create a dhclient.conf file in the
> location your distro expects to find it.
> This file will make sure that dhclient sends a hostname.
I prefer a different approach for this. It still relies on ethernet
(MAC) addresses, but it allows me to still use /etc/hosts and doesn't
rely on the client to send its hostname. If you populate /etc/hosts with
a mapping from hostnames to IP addresses and /etc/ethers with a mapping
from those same hostnames to MAC addresses, dnsmasq will automatically
associate the matching MAC addresses and IP addresses. If you configure
a subnet to give out static addresses, it will then use the mappings it
has from /etc/ethers to /etc/hosts to do the address assignment. For
example, here's a snippet of my various config files:
# DHCP range for internal LAN/WiFi
In this case, I have it giving out dynamic addresses as well as static
ones, but I could do static-only with a line like:
ronf at timeheart.net
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