nixCraft

I am connected to a server which provides internet connectivity.
I have installed rhel 5 on my machine. I have installed bind rpms on my machine,
I have not configured it. my /etc/resolv.conf is empty. No zone is defined in /var/named/chroot/var/named.conmf.
Then also, when I start named service, my machine can resolve any outside ip address or name.
eg. hjost yahoo.com gives yahoo's ip and vice versa. Why this is happening ?
I am able to access any internet site without setting proxy port in my browser. when named is stopped, this does not happen.
pls. guide me.

You must have enabled DHCP to obtain all the information. BIND is used as dns name server i.e. it serves zone data. For name resolution you only need to configure /etc/resolv.conf file using static or dhcp mode.

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Vivek Gite
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that is the problem with me. i have not entered anything in my resolv.conf file. then , how my machine is producing the right ip for yahoo.com by host command ? and also vice versa.
the server providing internet acces to us has following ports open as shown by nmap command.

22,23,25,53,80,110,113,139,143,389,443,515,548,312 8,980,981.

is that due to masquerading on the server ?