I recently retired my old centos based home firewall/router/dhcp/nat server and replaced it with a ubuntu-server install.
Generally speaking it went flawlessly but one thing didn't work. On the old centos box I had a dhclient-exit-hooks script that did some magic with my resolv.conf files so the firewall box could have the same name resolution as the clients on my network. My external interface is dhcp from the isp and for loadbalancing reasons my isp dns servers are dynamic. The easiest way to deal with this was to create a static /etc/resolv.conf.perm file. After a dhcp update and a new /etc/resolv.conf, I wrote a custom dhclient-exit-hooks to copy the new resolv.conf file to resolv.conf.forwards (the path that my dnsmasq config file is expecting) and then copy the resolv.conf.perm to resolv.conf. Only after the ubuntu setup this process does not work. this isnt a dnsmasq problem per se but I was hoping that someone of you out there are using ubuntu in this way and can help me figure out what I did wrong. I've googled, but I didn't find anything useful. Rance
