/etc/resolv.conf
If nothing helps, create /etc/resolv.conf.my, write needed
Code:
nameserver <DNS IP address>
lines into it, put the line 'cp /etc/resolv.conf.my /etc/resolv.conf' in a new script located in /etc/init.d (if it doesn't exist - in /etc/rc.d/init.d) and create a link to it named S99<script name you have chosen> in /etc/rc3.d , /etc/rc2.d and /etc/rc5.d .