User's Manual Part 2

Using SmartDefense
Chapter 9: Setting Your Security Policy 241
In this field… Do this…
Track Specify whether to log null payload ping packets, by selecting one of the
following:
• Log. Log the packets. This is the default.
• None. Do not log the packets.
TCP
This category allows you to configure various protections related to the TCP
protocol. It includes the following:
• Strict TCP on page 241
• Small PMTU on page 243
Strict TCP
Out-of-state TCP packets are SYN-ACK or data packets that arrive out of order,
before the TCP SYN packet.
Note: In normal conditions, out-of-state TCP packets can occur after the
Safe@Office restarts, since connections which were established prior to the reboot
are unknown. This is normal and does not indicate an attack.