User's Manual
Table Of Contents
- Getting Started
- Wizards
- Using the Startup Wizard
- Using the Wireless Wizard to Configure the Wireless Settings for ISA550W and ISA570W
- Using the DMZ Wizard to Configure the DMZ Settings
- Using the Dual WAN Wizard to Configure the WAN Redundancy Settings
- Using the Site-to-Site Wizard to Establish the Site-to-Site VPN Tunnels
- Using the Remote Access Wizard to Establish the IPSec VPN Tunnels or SSL VPN Tunnels for Remote Access
- Status
- Networking
- Configuring IP Routing Mode
- Port Management
- Configuring the WAN
- Configuring the WAN Redundancy
- Configuring the VLAN
- Configuring the DMZ
- Configuring the Zones
- Configuring the Routing
- Dynamic DNS
- IGMP
- VRRP
- Configuring the Quality of Service
- Address Management
- Service Management
- Wireless Configuration for ISA550W and ISA570W
- Firewall
- Configuring the Firewall Access Rules to Control Inbound and Outbound Traffic
- Configuring the Firewall Schedule
- Firewall Access Rule Configuration Examples
- Configuring the NAT Rules to Securely Access a Remote Network
- Configuring the Session Settings
- Configuring the Content Filtering to Control Access to Internet
- Configuring the MAC Filtering to Permit or Block Traffic
- Configuring the IP/MAC Binding to Prevent Spoofing
- Configuring the Attack Protection
- Configuring the Application Level Gateway
- Security Services
- VPN
- About VPN
- Configuring the Cisco IPSec VPN Server
- Configuring the Cisco IPSec VPN Client
- Configuring the Site-to-Site VPN
- Configuring the SSL VPN
- Elements of the SSL VPN
- Configuration Tasks to Establish a SSL VPN Tunnel
- Installing the Cisco AnyConnect VPN Client on User’s PC
- Importing the Certificates for User Authentication
- Configuring the SSL VPN Users
- Configuring the SSL VPN Gateway
- Configuring the SSL VPN Group Policies
- Configuring the SSL VPN Portal
- Configuring the L2TP Server
- Configuring the VPN Passthrough
- Viewing the VPN Status
- User Management
- Device Management
- Remote Management
- Administration
- SNMP
- Configuration Management
- Firmware Management
- Log Management
- Managing the Security License
- Managing the Certificates for Authentication
- Configuring the Email Alert Settings
- Configuring the RADIUS Servers
- Configuring the Time Zone
- Device Discovery
- Diagnosing the Device
- Measuring and Limiting Traffic with the Traffic Meter
- Configuring the ViewMaster
- Configuring the CCO Account
- Configuring the Device Properties
- Configuring the Debug Settings
- Troubleshooting
- Technical Specifications and Environmental Requirements
- Factory Default Settings
- Where to Go From Here
Networking
Configuring the DMZ
Cisco ISA500 Series Integrated Security Appliance Administrator Guide 123
4
Configuring the DMZ
A DMZ (Demarcation Zone or Demilitarized Zone) is a subnetwork that is behind
the firewall but that is open to the public. By placing your public services on a
DMZ, you can add an additional layer of security to the LAN. The public can
connect to the services on the DMZ but cannot penetrate the LAN. You should
configure your DMZ to include any hosts that must be exposed to the WAN (such
as web or email servers).
The DMZ configuration is identical to the VLAN configuration. There are no
restrictions on the IP address or subnet assigned to the DMZ port, except it cannot
be identical to the IP address given to the predefined VLANs.
Figure 4 Example DMZ with One Public IP Address for WAN and DMZ
235140
www.example.com
Internet
Public IP Address
209.165.200.225
ISA500
User
192.168.75.10
LAN Interface
192.168.75.1
DMZ Interface
172.16.2.1
Web Server
Private IP Address: 172.16.2.30
Public IP Address: 209.165.200.225
User
192.168.75.11
Source Address Translation
209.165.200.225 172.16.2.30