Chapter 18 Traffic Shaping : Traffic shaping methods : Enabling traffic shaping in the security policy : Reverse direction traffic shaping
  
Reverse direction traffic shaping
The shaper you select for the security policy (shared shaper) will affect the traffic in the direction defined in the policy. For example, if the source port is port 1 and the destination is port 3, the shaping affects the flow in this direction only, that is, the upload or outbound direction. By selecting Shared Traffic Shaper Reverse Direction, you can define the traffic shaper for the policy in the opposite direction, that is, the download or inbound direction. In this example, from port 3 to port 1.
To add a reverse shaper
1. Go to Policy & Objects > Policy > IPv4.
2. Click Create New or select an existing policy and click Edit.
3. Navigate to the Traffic Shaping section, enable the Shared Shaper and select a shaper from the dropdown list.
4. Enable the Reverse Shaper and select a shaper from the dropdown list.
5. Select OK.
See also 
Setting the reverse direction only
Shared policy shaping
Per-IP shaping
Application control shaping
Type of Service priority
Differentiated Services
ToS and DSCP traffic mapping
Traffic Shaper Monitor