User guide

SmartDefense Categories
Chapter 14: Using SmartDefense 481
Sequence Verifier
The Safe@Office appliance examines each TCP packet's sequence number and checks
whether it matches a TCP connection state. You can configure how the appliance handles
packets that match a TCP connection in terms of the TCP session but have incorrect
sequence numbers.
Table 96: Strict TCP
In this field…
Do this…
Action Specify what action to take when TCP packets with incorrect sequence
numbers arrive, by selecting one of the following:
• Block. Block the packets.
•
None. No action. This is the default.
Track Specify whether to log TCP packets with incorrect sequence numbers, by
selecting one of the following:
• Log. Log the packets. This is the default.
•
None. Do not log the packets.