PLANET CS-2001 - Manual (Page 271)

260
Step 11. Under Policy > Outgoing, click New Entry and then set as below:
（Figure 11-43）
 Select the defined Trunk for VPN Trunk.
 Click OK.
（Figure 11-44）
Figure 11-43 Using VPN Trunk in an Outgoing Policy
Figure 11-44 An Outgoing Policy with VPN Trunk