ZyXEL Communications 10 - Manual (Page 208)

ZyWALL 10~100 Series Internet Security Gateway
16-12 Creating Custom Rules
Figure 16-4 Creating/Editing A Firewall Rule (ZyWALL100)
Table 16-3 Creating/Editing A Firewall Rule
FIELD DESCRIPTION OPTIONS
Active Check the Active check box to have the ZyWALL use this
rule. Leave it unchecked if you do not want the ZyWALL to
use the rule after you apply it