As it is well known, it is recommended that the system administrator login to the system using a normal user (non-root). When the admin needs to do privileged tasks,
sudo can be used to become superuser. Before gaining the requested privileges, the admin will be prompted to enter the SAME password used in the first login.
I was wondering whether it is possible to configure the system to ask the user for a different password when doing
sudo. So, the user will have two passwords. The first password will provide access to SSH session. The other password (not the same one) will be used to gain the admin (root) privileges.
Is this possible? I think it will add more security to the system. Do you agree?
BTW, this will be similar to the access control used by Cisco devices. First, the admin login using a password. Then, accessing "enabled" (privileged) mode requires another password (can be different or same password).