Final answer:
The default av-failopen settings are typically 'Disabled, pass', allowing files to pass without being scanned if an error occurs. These settings are crucial for system administrators to configure according to their security needs.
Step-by-step explanation:
The default av-failopen settings for many systems are typically set to Disabled, pass. This means that by default, when the antivirus (AV) system encounters an unscannable file or a system error, it will not block traffic. Instead, it allows the file to pass through the system without being scanned, hence 'fail open'. This setting is important because it dictates how the system behaves when it encounters a situation where security procedures cannot be performed as configured.
In contrast, if the av-failopen setting is enabled, the system would block the traffic ('fail closed') when such a situation occurs. Depending on the system's configuration, there might be other modes available as well, such as 'one-shot', which allows a single instance of unscannable traffic to pass before changing the behavior to fail closed. It's essential for administrators to be aware of these settings and configure them according to the security posture and requirements of their organization.