dhcpd: mac + range

Skar · n00b Joined: 23 May 2003 Posts: 22

Hi,

i wondered if its possible to assign an ip of a specific range to a specific hardware address. if i try to put the hardware address in the subnet declaration it won't work.

any ideas?

thx
Skar

n3mo · Posted: Sat Jun 12, 2004 1:17 pm Post subject:

I think you better post your dhcp.conf but

Skar · n00b Joined: 23 May 2003 Posts: 22

the problem is, i don't want to give a static ip to a hardware address.
i want to set up a pool of ips from which a pool of hardware addresses take one
if needed

so normally you either have a "subnet" with a range of ips or you have a
hardware address with exactly one ip.
I want both together, cause I've more potentially computers then ips

my dhcpd.conf won't help, cause i've just the standard options in there
cause i don't know how to manage it like i want

nobspangle · Posted: Sat Jun 12, 2004 1:33 pm Post subject:

I don't understand,

what happens when a computer connects that isn't in the list of MAC addresses? Do they get an address if so what pool does that address come from?

I think it would help if you gave some figures like the number of devices you have and the number of IP addresses and the range that those IPs are in.

nobspangle · Posted: Sat Jun 12, 2004 1:52 pm Post subject:

looks like it is possible using a group decleration

it may also be possible using a pool decleration with permit and deny lists.

have a look at

man dhcpd.conf

loads of info in there

Skar · n00b Joined: 23 May 2003 Posts: 22

lets say i've 5 notebooks here and only 3 ip addresses.

So I want a dhcpd which gives one of the 3 ips to any of the five laptops, when
they become connected. So this you do normally with something like this:

subnet 192.168.1.0 netmask 255.255.255.0 {
range 192.168.1.10 192.168.1.13;
}

Now I want that ONLY these five laptops are allowed to get these addresses.
Normally you've to assign an ip to a specific computer with the option "hardware address"
like you've done it.
But I want these to things combined, so I want to define the hardware addresses
which are allowed to get an IP from a specific range.

nobspangle · Posted: Sat Jun 12, 2004 1:59 pm Post subject:

try

n3mo · Posted: Sat Jun 12, 2004 2:12 pm Post subject:

It seems only a trick but why don't use iptables to filter requests to your dhcp server ?

nobspangle · Posted: Sat Jun 12, 2004 2:17 pm Post subject:

looks like what you need to do is have a

Skar · n00b Joined: 23 May 2003 Posts: 22

nobspangle · Posted: Sat Jun 12, 2004 6:22 pm Post subject:

Skar · n00b Joined: 23 May 2003 Posts: 22

nobspangle · Posted: Sat Jun 12, 2004 10:53 pm Post subject:

after I corrected your spelling

it all worked fine.

Skar · n00b Joined: 23 May 2003 Posts: 22

I just copy&paste this stuff but if I try to start I get the error:

nobspangle · Posted: Sun Jun 13, 2004 7:59 am Post subject:

I don't know what you are copying and pasting, the conf I posted only has 20 lines your errors are talking about lines 23 29 and 36.
I suggest

Skar · n00b Joined: 23 May 2003 Posts: 22

the errors where in other lines cause i've just outcommented the older settings.

If I start from beginning the error stays the same.

nobspangle · Posted: Sun Jun 13, 2004 8:27 am Post subject:

could you post your current conf and the errors you currently get

Skar · n00b Joined: 23 May 2003 Posts: 22

hm, after a clean reemerge and setting up clean config files, it seems to work

so I think i screwed it up somewhere but now it seems to be fine.

Thx for help and patience

nobspangle · Posted: Sun Jun 13, 2004 8:48 am Post subject:

no worries glad you got it working