Wireless Setting

For some reasons, my Wireless network wasnt longer working again after I returned from my trip. After spending 20mins on phone with Star Hub svc, I was told its to do with I.P address in my Linksys Wireless Router that wasnt set up. An hour + on another phone with Linksys and finally got it resolved with resetting etc...I actually do not mind spending the time on phone as long as the machine is back up and running again ! Afterall, I need it badly, in order to work OT from home !