Linux vmnet devices by default can only be modified by root, thus running VMware Workstation as root is required to run hosts or virtual appliances using network interfaces in promiscuous mode. Unless you do the following:

1. Create a group, promiscuous; # groupadd promiscuos
2. Add a user to the group; # usermod -g -G promiscous <useraccount>
3. Modify VMware network device privileges; # chmod g+rw /dev/vmnet*
4. Changes will not be instated after a reboot, thus edit # vi /etc/rc.d/rc.local
5. Append chgrp promiscuous /dev/vmnet*
6. Append chmod g+rw /dev/vmnet*
7. Exit saving changes then reboot.
8. Done.