DHCP Server Configuration Problem

[DÔ Phan-Cam-Thach]

Fisrt of all, thank you so much for sharing me, a beginner at Linux, your experiences. Because of my limited knowledge of Linux, i have spent one day reading the basic things of Linux. Now, i have started the server without the problems of packages lacking. I have connected the client and the server and used Wireshark for watching the packets exchanged. 
My problem now is that even the client sends DHCP Discover packet, the server doesn't answer. So there is only DHCP Discover packet that are sent. I have configured dhcpd.conf for my network. But i noticed that when i started DHCP server by using: dhcpd start, there was a notice: "not configured to listen on any interface". I think this affect the resultat. But i'm not sure and i dont know how to resolve this problem.
In addition, i dont know if i have to do something with the client or just start the server and start wireshark in each side for watching the packets exchanged.
Once more, thank you so much for helping me
 
DO Phan Cam Thach
email: dophancamthach at yahoo.co.uk



----- Original Message ----
From: Simon Hobson <dhcp1 at thehobsons.co.uk>
To: dhcp-users at isc.org
Sent: Monday, 26 May, 2008 8:26:08 PM
Subject: Re: DHCP Server Configuration Problem

DÔ Phan-Cam-Thach wrote:

>I have tried it, and the resultat returned is:
>
>"can't  open lease database /var/db/dhcpd.leases/no such file or directory"
>
>And in fact there is no folder whose name is db in /var.

So you have noticed any connection between an 
error message "/var/db/dhcpd.leases/ no such file 
or directory" and the fact that there is no file 
at that path ?

If the directory doesn't exist, then create it. Eg :
  mkdir -p /var/db
  touch /var/db/dhcpd.leases

The first command will make the directory, the 
second will create an empty file within it.

>I have search for the file lease and it is in 
>/usr/local/share/man/man5, but the name is 
>dhcpd.leases.5. I found that there is nothing 
>important inside, just the explaination of what 
>the file dhcpd.lease is.

It's the man page - ie what is used to display 
help if you type "man dhcpd.leases" !

>  However, i tried this command:
>
>sudo /usr/local/sbin/dhcpd -lf /usr/local/share/man/man5/dhcpd.leases.5
>
>It return a resultat "can not open 
>/etc/dhcpd.conf: no such file or directory" 
>(there is not this file in /etc).

Again, do you not spot the connection between 
"can not open /etc/dhcpd.conf: no such file or 
directory" and the fact that there is no such 
file ?


It seems you have multiple problems :

1) You have limited knowledge of Linux, and that 
means you don't really understand what people are 
telling you.

2) You have installed from source, and so it's 
quite possible that required files/directories 
have not been created for you - and neither us, 
nor I suspect yourself, know what config options 
were specified at compile time.

3) It appears from earlier emails that you may 
have another problem (permissions ?) that is 
stopping you from creating the required config 
file.


Given your limited skills, I would suggest that 
you should try installing your distributions 
package for the DHCP server. That will take care 
of creating the right files, in the right places 
for your package - then all you need to 
concentrate on is the actual config.


If you want to persist with your currently 
installed program, then try this and let us know 
what happens :

  mkdir -p /var/db
  touch /var/db/dhcpd.leases
  touch /etc/dhcpd.conf
  dhcpd -t -cf /etc/dhcpd.conf -lf /var/db/dhcpd.leases

These commands will :

Create /var/db/dhcpd.leases if it doesn't already exist.
Create /etc/dhcpd.conf if it doesn't already exist.
Test (the '-t' option) the config using the 
config and leases files ('-cf' and '-lf' options) 
specified. It will probably fail with an empty 
config file, but the results will be useful.


      __________________________________________________________
Sent from Yahoo! Mail.
A Smarter Email http://uk.docs.yahoo.com/nowyoucan.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/dhcp-users/attachments/20080529/2f32e93d/attachment.html>