[Dnsmasq-discuss] DHCP for pairs MAC:IP only
vip at iptrans.net
vip at iptrans.net
Thu Jan 25 17:57:20 GMT 2018
2018-01-25 18:42, john doe написав:
> On 1/25/2018 4:55 PM, vip at iptrans.net wrote:
>>
>> Good day
>>
>> I have a DHCP-router based on dnsmasq with interface eth2 and networks
>> 192.168.100.1/24 192.168.102.1/24 10.0.0.1/27 on this interface. There
>> are computers-dhcp-clients on this network which have to get IP based
>> on their MAC-addresses. And if file /etc/dnsmasq.conf doesn't contain
>> line with corresponding MAC (option dhcp-host) then this computer
>> doesn't get an IP via my DHCP-router.
>>
>> But.
>>
>> In /etc/dnsmasq.conf:
>>
>> # 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.
>> # dhcp-range=192.168.0.50,192.168.0.150,12h
>>
>> And if I uncomment "# dhcp-range" then I'll have computer-dhcp-client
>> which will get a ip address without corresponding MAC in
>> /etc/dnsmasq.conf.
>>
>
> If I understand you correctly you want only hosts that have a matching
> mac address to be given an address for a specific subnet
> (192.168.100.0/24).
> For that you can use the 'static' keyword:
>
> dhcp-range=192.168.100.2,static,12h
>
> In case it is not what you want dhcp-host should have the form:
>
> dhcp-range=192.168.100.2,192.168.100.253,12h
> dhcp-host=ab:cd:ef:gh:ij:kl,fix-ip-to-be-given-to-host
Thanks.
:) My man page for dnsmasq doesn't have a information about optional
static mode for dhcp-range like on link
http://www.thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html:
"The optional <mode> keyword may be static which tells dnsmasq to enable
DHCP for the network specified, but not to dynamically allocate IP
addresses: only hosts which have static addresses given via dhcp-host or
from /etc/ethers will be served. A static-only subnet with address all
zeros may be used as a "catch-all" address to enable replies to all
Information-request packets on a subnet which is provided with stateless
DHCPv6, ie --dhcp-range=::,static"
For example configuration:
interface=eth2
dhcp-range=192.168.100.0,static
dhcp-range=192.168.102.0,static
dhcp-range=10.0.0.0,static
dhcp-host=ab:cd:ef:gh:ij:kl,192.168.102.10
With this configuration pc with mac "ab:cd:ef:gh:ij:kl" get
192.168.102.10 and no other ip.
Аnd any other pc with a different mac will not receive any ip from my
dhcp-server.
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