Comments on: Configure your Ubuntu Server as a DHCP server

By: etaoin.shdrlu

etaoin.shdrlu — Wed, 03 Mar 2010 13:38:19 +0000

Very useful link.

I own a computer Ubunt Karmic, with eth0 and eth1.

eth0 is safely connected to the internet through an static ip

I would like to use eth1 to feed a Linksys router (through its internet port). I disabled router’s DHCP server and installed a DHCP-server on my computer following the instructions.

I plug another computer to the router and try to bring the net up by listeing to DHCP server. It didn’t work. It was waiting for DHCP offers on 255.255.255.255 until the script finished.

Neither was I able to talk or listen to the router itself.

On the other hand ‘tail -n 15 /var/lib/dhpc3/dhclient.leases’ lists:

lease {
interface “eth0″;
fixed-address 192.168.1.100;
option subnet-mask 255.255.255.0;
option routers 192.168.1.2;
option dhcp-lease-time 86400;
option dhcp-message-type 5;
option domain-name-servers xxxxxxx;
option dhcp-server-identifier 192.168.1.2;
option domain-name “xxx”;
renew 3 2010/03/03 00:41:58;
rebind 3 2010/03/03 10:16:17;
expire 3 2010/03/03 13:16:17;
}

altough the DHCP server was intened to be in eth1 and /etc/default/dhcp-server exactly reads so.

The router was configured to get its IP address through DHCP, but aparently it failed to get it from my computer (dhcp-server).

I would appreciate very much any hint to solve my problem. Specifically how could I configure the DHCP server IP address.

By: Charles

Charles — Sun, 15 Nov 2009 12:08:11 +0000

i recently install ubuntu on my machine and after assigning ip address to the machine and the gateway of the router i could not browse, what could be the reason

By: Nitin

Nitin — Fri, 02 Oct 2009 19:43:27 +0000

Hi,
Now my DHCP sever gets installed started successfully .How I can check it works over lan network.
Thanx

By: Configure your Ubuntu Server as a DHCP server | Ubuntu-News - Your one stop for news about Ubuntu

Mon, 07 Sep 2009 17:33:46 +0000

[...] but it’s not. And many might be asking “Why do this when my router does the trick?” More here Most routers do a good job of serving up DHCP addresses. But there are times when those routers [...]

By: Rush

Rush — Mon, 07 Sep 2009 17:22:30 +0000

Jack,
This is an awesome set of articles. It comes at a good time for me also, because I started toying around with Ubuntu server in a VM about 2 weeks before you started these.
I have a few quick questions. I installed ubuntu-desktop (I’m a windows wussy that DOVE at the GUI like a gunshot had gone off). Since finding your series I have kind of regretted doing that.
Should I start over? I am a total noob to Linux. I have tried to follow some of your steps through the terminal but when I try to edit config files (even after sudo and password) it wont let me. A permissions issue. I want to be able to follow the series on my server, and have already redone the darn thing like 20 times already, so starting over is no big deal.
Would that be easier for me to do to follow this series?

By: Dotan Cohen

Dotan Cohen — Mon, 07 Sep 2009 13:52:34 +0000

Jack, will this let me connect with Windows machines in an ad-hoc wired lan? Specifically, if I connect my Ubuntu laptop with a Windows desktop via crossover cable, can I then access an FTP server on the Ubuntu laptop from the Windows machine to transfer files?

Thanks in advance for any ideas.

By: jack

jack — Mon, 07 Sep 2009 12:38:57 +0000

Manju:

Yes the DHCP server will replace you router. You would want to log into your router and make sure it is configured to no longer assign IP addresses.

If you are using it with wireless you should just have to replace the eth0 with somethin like wlan0.

The config should be the same.

By: Manju

Manju — Mon, 07 Sep 2009 01:39:27 +0000

Helpful article as usual.

I do have a few questions. Forgive my noobness.

1. So will this DHCP server replace my router for assigning addresses to my local LAN .

2. And if my Ubuntu server is not using eth0 but the wireless interface instead I just have to replace “eth0″, will that be enough.

3. And I have Ubuntu 8.10. So the config files are the same or is there a difference.