Sequence Verifier

The UTM-1 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.

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.

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.