Log monitoring tools performing behavioral analysis have alerted several suspicious logins on a Linux server occurring during non-business hours. After further examination of all login activities, it

Time Keeper is not a recognized or standardized network protocol for time synchronization used on Linux or any major operating system.

NTP operates over UDP port 123 and is the universally adopted protocol for clock synchronization on Linux servers, typically managed by services like ntpd or chrony. When the NTP service stops or loses connectivity to its time sources, the system clock drifts freely and can become off by hours, as seen in this scenario. Incorrect system time directly causes security log timestamps to be inaccurate, leading to false behavioral alerts such as logins appearing outside business hours.

PPP (Point-to-Point Protocol) is a Layer 2 data link protocol used to establish direct connections between two nodes and has no role in time synchronization.

OSPP is not a real or standardized networking or time synchronization protocol.