IBM System i Manual page 22

Figure 1. Operations Console LAN security
The System i console security consists of:
Service device authentication
This security assures one physical device is the console. Operations Console local console directly
attached to the server is a physical connection similar to a twinaxial console. The serial cable you
use for Operations Console using a direct connection may be physically secured similar to a
twinaxial connection to control access to the physical console device. Operations Console local
console on a network uses a version of Secured Sockets Layer (SSL) that supports device and user
authentication, but without using certificates.
Device authentication
The device authentication is based on a service tools device ID. Service tools device IDs are
administered in the dedicated service tools (DST) and system service tools (SST). They consist of
a service tools device ID and a service tools device ID password. The default service tools device
ID is QCONSOLE and the default password is QCONSOLE. An Operations Console local console
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System i: Connecting to System i Operations Console