r8125 : r8125 vendor driver for Realtek RTL8125 PCI-E NICs ( https://www.realtek.com/Download/List?cate_id=584 )
r8152 : r8152 driver for Realtek USB FE / GBE / 2.5G Gaming Ethernet Family Controller ( https://github.com/jayofdoom/realtek-r8152-unchanged )
r8168 : r8168 driver for Realtek 8111/8168 PCI-E NICs ( https://www.realtek.com/Download/List?cate_id=584 )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a natinst
For Paludis use this rsync : rsync://gentoo.zugaina.org/natinst-portage
If you have a problem : ycarus(-at-)zugaina.org