Default Severity
NOTICE
Log Message
TCP
acknowledgement
<ack>
is
not
in
the
acceptable
range
<accstart>-<accend>. Dropping
Explanation
A TCP segment with an unacceptable acknowledgement number was
received during state SYN_SENT. The packet will be dropped.
Gateway Action
drop
Recommended Action
None.
Revision
1
Parameters
ack
accstart
accend
Context Parameters
Rule Name
Connection
Packet Buffer
2.43.15. rst_without_ack (ID: 03300018)
Default Severity
NOTICE
Log Message
TCP RST segment without ACK during state SYN_SENT. Dropping
Explanation
A TCP segment with the RST flag but not the ACK flag was received
during state SYN_SENT. The packet will be dropped.
Gateway Action
drop
Recommended Action
None.
Revision
1
Context Parameters
Rule Name
Connection
Packet Buffer
2.43.16. tcp_seqno_too_high (ID: 03300019)
Default Severity
WARNING
Log Message
TCP sequence number <seqno> is not in the acceptable range
<accstart>-<accend>. Dropping
Explanation
A TCP segment with an unacceptable sequence number was received.
The packet will be dropped.
Gateway Action
drop
Recommended Action
None.
Revision
1
2.43.15. rst_without_ack (ID:
03300018)
Chapter 2. Log Message Reference
439
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