I upgraded my mother board CPU to a i7 8700k and now I'm not able to get back into my GUI.  Server boots and tells me my IP is 192.168.86.40 which is what it was before but web browsers says site cannot be reached.  I am able to boot into the GUI directly from the server and everything looks ok. Even comes up on my router that server is connected but still no access to the GUI or any of the dockers. I can also sometimes connect to my server by typing http://unraid/Dashboard. But clicking on a tab or link it tells me site cannot be reached.

Edited December 28, 20187 yr by jluna
forgot to add something

IF the the NIC is set to static set it to DHCP and see if you're receiving an IP address.

One thing to remember is that the MAC address of the NIC will be different if you are using the onboard NIC.  With a static address, your router could easily be confused when it detects a mis-match between these old and new MAC addresses.  (Many routers do use MAC addresses in their internal tables.) 

I changed the IP from static to automatic and it worked. I figured that MAC address had something to do with it. I'm still new to unraid but thank you for helping me figure it out.