Check or Attack Name: IcmpTstamp

The target machine responded to an ICMP timestamp request. By accurately determining the target's clock state, an attacker can more effectively attack certain time-based pseudorandom number generators (PRNGs) and the authentication systems that rely on them.

Configure your firewall or filtering router to block outgoing ICMP packets. Block ICMP packets of type 13 or 14 and/or code 0.