ZyXEL Communications ZYWALL USG 2000 Support Notes page 189

Then switch to menu Firewall > To-ZyWALL rules to add the HTTP access from
WAN side.
Note: By default, Firewall blocks all the access except the traffic like VRRP, IPSec
ESP, IPSec AH, IPSec NATT, IPSec IKE.
A03. What's difference between "Admin Service Control" and "User Service
Control" configuration in GUI menu System > WWW?
All contents copyright (c) 2008 ZyXEL Communications Corporation.
ZyWALL USG 2000 Support Notes
189