Hi.
I have a linux Fedora core which serves as my webmail server as well as my DHCP server.

I have configured the dns in the cat /etc/resolv.conf file as below:
search domain.co.tz
name server x.x.x.x
name server x.x.x.x

My problem is that, I have both wired LAN and wireless networks which use this DHCP server. However, when I set machines on the LAN to 'Obtain IP Automatically' the machine picks IP fine, but for IPV4 DNS Server it picks the ip of the LINUX BOX as the DNS.

As such my machines as well as wireless devices cannot access internet. I have to manually configure DNS for all machines on the network.

How do I enable the linux box to automatically assign DNS to the machines and wireless devices?

Regards
alobi

Look at your DHCP configuration files. They have options to force what goes into resolv.conf - otherwise it puts whatever the DHCP server specifies into resolv.conf.