I am running a Macbook Pro, version 10.8.5. A few days ago, our firewall took a dirt nap and I had to bypass it while I am waiting on the new firewall. I was able to get the cable modem to dish out the IP addresses and everything else connected and is working fine. Unfortunately, my Macbook Pro isn't connecting due to an IP conflict with the file server. I have rebooted the router, the server and my computer to no avail. I can only connect with a DHCP with a manual address. I have tried to delete the connection and reconnect with a new connection but that still isn't working. Any ideas?