Casio ISA550WBUN3K9 manual Security Levels and Predefined Zones Description

Firewall	6
Configuring Firewall Rules to Control Inbound and Outbound Traffic

Security Levels and Predefined Zones

Security Level	Description	Predefined Zones
Trusted (100)	Highest level of trust.	LAN
	By default, the DEFAULT VLAN is
	mapped to the predefined LAN zone.
	You can group one or more VLANs into a
	Trusted zone.
VPN (75)	Higher level of trust than a public zone,	VPN
	but a lower level of trust than a trusted	SSLVPN
	zone.
	This security level is used exclusively for
	VPN connections. All traffic is encrypted.
Public (50)	Higher level of trust than a guest zone,	DMZ
	but a lower level of trust than a VPN
	zone.
Guest (25)	Higher level of trust than an untrusted	GUEST
	zone, but a lower level of trust than a
	public zone.
Untrusted (0)	Lowest level of trust.	WAN
	By default, the WAN1 interface is
	mapped to the WAN zone. If you are
	using the secondary WAN (WAN2), you
	can map it to the WAN zone or any other
	untrusted zone.
Voice	Designed exclusively for voice traffic.	VOICE
	Incoming and outgoing traffic is
	optimized for voice operations. For
	example, assign Cisco IP Phones to the
	VOICE zone.

Cisco ISA500 Series Integrated Security Appliances Administration Guide 253