I put together this simple cabinet to clean up our networking gear in the laundry room. It’s based off one of the 15” deep BESTA cabinets from IKEA. I found some cheap 6” DIY rails I found on amazon, shimmed with some scraps of wood I had in the garage.
The cables all run out the top of the cabinet through a Toilet Flange, which is attached to a 4” pipe into the attic. It must not be hideous, because the wife is happy!