•  net-vpn
•  sys-apps
•  sys-kernel

net-vpn

net-vpn / wireguard : Simple yet fast and modern VPN that utilizes state-of-the-art cryptography.

• Compile the actual WireGuard kernel module. Most certainly you want this enabled, unless you're doing something strange.

sys-apps

sys-apps / smc-sum : Updates the BIOS and IPMI firmware and system settings on Supermicro mainboards

• Install Supermicro's kernel module.

sys-kernel

sys-kernel / aufs-sources : Full sources (incl. Gentoo patchset) for the linux kernel tree and aufs5 support

• Patch kernel to allow aufs being build as a module.