Clients don't receive DNS Information via DHCP

[JKO]

Hi Folks,

I need some help! everything is running fin, gateway and dns server are in the dhcp.conf and resolfe.conf
Clients getting there IPS correctly, and the Gateway too - but no DNS entry.

Client sending DHCPDISCOVER
Server send DHCPOFFER
and Cleint answers with DHCPACK

but no DNS - i can reach every server (also internet) by using IP adresses, but nothin by name
The Fogserver DNS itself working weill.

I got over and over the configs - everything fine - so what can I do - please help!

thx jan

forgott the system info and configs - sorry:

[CODE]System Info:

FOG Server Version: 0.32

Distributor ID: Ubuntu
Description: Ubuntu 11.10
Release: 11.10
Codename: oneiric

dhcpd.conf:

DHCP Server Configuration file.

see /usr/share/doc/dhcp*/dhcpd.conf.sample

This file was created by FOG

use-host-decl-names on;
ddns-update-style interim;
ignore client-updates;
next-server 10.7.30.183;
subnet 10.7.30.0 netmask 255.255.255.0 {
option subnet-mask 255.255.255.0;
range dynamic-bootp 10.7.30.201 10.7.30.235;
default-lease-time 180;
max-lease-time 300;
option domain-name-servers 10.7.1.18, 10.7.1.20;
option routers 10.7.30.254;
filename “pxelinux.0”;
}

/etc/resolv.conf
nameserver 10.7.1.18
nameserver 10.7.1.20

/etc/network/interfaces
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 10.7.30.183
netmask 255.255.255.0
network 10.7.30.0
broadcast 10.7.30.255
gateway 10.7.30.254[/CODE]

[joshua]

can you specify more detail?

Where is DNS on your network? is it a domain server? is DNS on this fog server? [B]IS DNS and DHCP on the same server?[/B]

Also, please verify that you only have 1 DNS server on your network. (may have installed it with fog and now you have two… that happend to me once.)

please provide more detail and we can try to help you further. also what does an NSLookup command show you?

[Jtb]

The FOG-Client only uses bootp and no dhcp…
Means: no dhcp -> no dns…

But I vote for adding real dhcp support for dhcp environments with dhcp snooping and dynamic arp inspection.

[JKO]

we have 2 DNS Server in the network - FOG is DHCP but NOT the DNS
FOGSERVER itself kan resolve hostnames - nslookup on FOG Server works well - Clients are booting with DHCP and get correct address from FOG Server, but gateway and DNS are missing by using IPCONFIG on the clients.

From Fogserver both DNS in our Network working well - tested with dig on every DNS and approved …

[Jtb]

The DNS-Server isn’t assigned automatically - the FOG-Client only uses bootp for PXE-Boot and after that Kernel-DHCP.

If you need DNS inside the FOG-Client you can use the PXE_IMAGE_DNSADDRESS setting.

But I don’t know why your gateway is missing…