Chapter 15 Unified Threat Management for FortiOS 5.0 : Custom Application & IPS Signatures : Custom signature keywords : TCP header keywords : dst_port
  
dst_port
Syntax: --dst_port [!]{<port_int> | :<port_int> | <port_int>: | <port_int>:<port_int>};
Description:
Use the dst_port keyword to specify 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.