The RJ-45 that connects to the Rock cannot have anti-snag or strain relief. It is best to hand crimp this RJ-45 connector without anti-snag or a strain relief boot.
The Rock is shipped with an Ethernet pigtail installed. The RJ-45 on the male end of the pigtail does not have strain relief. If using standard Ethernet patch cords, do not connect them directly to the Rock, rather connect them to the female end of the pigtail.
Only connect an RJ-45 omitting anti-snag and strain relief directly to the Rock.