DHCP server for only IP+masc

Jose Rivas · 08-25-2006, 06:03 PM

I was reading the documents for this dhcp server issue. Create dhcpd.leases, modify the dhcpd.conf , subnet etc etc but I don't understand how to serve only IP+masc, not gateway or DNS, for a simple network (no subnet).
Example:
samba server address:
eth0 10.2.2.1 masc 255.255.255.0 (no gt, no dns)
From this machine I want to serve dhcp too, only IP + same masc to this range: 10.2.2.100-150
Please, how to do this with simple steps.

blackhole54 · 08-29-2006, 10:20 AM

I am certainly no dhcpd guru, so I might lead you astray. I just have a simple setup with the following dhcpd.conf file:

Code:

  subnet 192.168.1.0 netmask 255.255.255.0 {
    range 192.168.1.32 192.168.1.99;
    default-lease-time 7200;
    max-lease-time 21600;
    option routers 192.168.1.5;
    option ip-forwarding off;
    option broadcast-address 192.168.1.255;
    option subnet-mask 255.255.255.0;
    option domain-name-servers 65.247.xx.xx, 65.247.xx.xx;
  }

I believe (but I have not tried) that simply eliminating the lines for DNS and gateway ("routers") will give you what you want, i.e.:

Code:

  subnet 192.168.1.0 netmask 255.255.255.0 {
    range 192.168.1.32 192.168.1.99;
    default-lease-time 7200;
    max-lease-time 21600;
    option ip-forwarding off;
    option broadcast-address 192.168.1.255;
    option subnet-mask 255.255.255.0;
  }

And I suppose you could eliminate the line about "ip-forwarding."

Is this what you were asking?

Jose Rivas · 08-29-2006, 03:38 PM

Yea I was thinking same way to do it. Oh god I'm nervous to try (like I began some years ago to use Linux). Will try later when the users go home.
Thanks.

blackhole54 · 08-30-2006, 05:02 AM

If you are accessing the computer locally (i.e. not over a network connection) you would not be running much of a risk. Just create (or change) the file, start or restart dhcpd (watching for any error messages), and make sure the client machines get the right info when they boot. As always, if you modify an existing file, it is a good idea to keep a backup of the original at least until you have verified the changes work. (I generally keep them around quite a while just to be safe.)

Good luck.