Thank you for the messages. I am having a look at webmin, I haven't tried it for years, but I am no able to find any specific k12ltps configuration reference in webmin :-( I was thinking about doing right what Rob says: scripts using sed to change all the involved configuration files (quite some of them). I am not an expert in bash scripting, but I have some experience about it, so probably is the easiest solution. I'd like to do some kind of "graphic script", but I am completely new at that. I will try the scripts, any ideas are welcome :-) <div class="gmail_quote">2008/10/22 Rob Owens <<a href="mailto:rob.owens@biochemfluidics.com">rob.owens@biochemfluidics.com</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I think his point is that there are multiple config files where IP's need to change. For instance: dhcpd.conf, exports, ifcfg-eth0, etc.</blockquote></div>