Fortinet Network Device IPS - Manual (Page 30)

FortiGate IPS User Guide Version 3.0 MR7
30 01-30007-0080-20080916
Creating custom signatures Custom signatures
Table 6: TCP header keywords
Keyword and Value Description
--ack <ack_int>; Check for the specified TCP acknowledge
number.
--dst_port [!]{<port_int> |
:<port_int> | <port_int>: |
<port_int>:<port_int>}; The destination port number.
You can specify a single port or port range:
•
<port_int> is a single port.
• :<port_int> includes the specified port and
all lower numbered ports.
• <port_int>: includes the specified port and
all higher numbered ports.
• <port_int>:<port_int> includes the two
specified ports and all ports in between.
--seq <seq_int>; Check for the specified TCP sequence number.
--src_port [!]{<port_int> |
:<port_int> | <port_int>: |
<port_int>:<port_int>}; The source port number.
You can specify a single port or port range:
•
<port_int> is a single port.
• :<port_int> includes the specified port and
all lower numbered ports.
• <port_int>: includes the specified port and
all higher numbered ports.
• <port_int>:<port_int> includes the two
specified ports and all ports in between.