To pass through the network connection to nested VMs, the first VM has to put the network adapter into promiscuous mode.
By default only root is allowed to do that, however the permissions can also be granted to others.
Grant permission to group:
chgpr (group) /dev/vmnetX
chmod g+rw /dev/vmnetXGrant permission to everyone:
# chmod a+rw /dev/vmnetX
Enable the following two settings under "Processor" in the settings of the VM.
Virtualize Intel VT-x/EPT or AMD-V/RVI
Virtualize CPU performance counters
Add kvm.ignore_msrs=1 in /etc/default/grub to GRUB_CMDLINE_LINUX_DEFAULT=
Update the Grub configuration
# grub-mkconfig -o /boot/grub/grub.cfg
Debian
# apt install open-vm-tools
Arch
# pacman -S open-vm-tools