User's Manual

Getting Started
About the Default Settings
Cisco ISA500 Series Integrated Security Appliance Administration Guide 26
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• IP Routing Mode: By default, only the IPv4 mode is enabled. To support the
IPv4 and IPv6 addressing, you need to enable the IPv4/IPv6 mode. To
change the IP routing mode, see Configuring IP Routing Mode, page 95.
• WAN Configuration: By default, the security appliance is configured to
obtain an IP address from your ISP by using Dynamic Host Configuration
Protocol (DHCP). Depending on the requirement of your ISP, you will need to
configure the network address mode for the primary WAN and the
secondary WAN if applicable. You can change other WAN settings as well.
See Configuring the WAN, page 101.
• LAN Configuration: By default, the LAN of the security appliance is
configured in the 192.168.1.0 subnet and the LAN IP address is 192.168.1.1.
The security appliance acts as a DHCP server to the hosts on the WLAN or
LAN network. It can automatically assign IP addresses and DNS server
addresses to the PCs and other devices on the LAN. For most deployment
scenarios, the default DHCP and TCP/IP settings should be satisfactory.
However, you can change the subnet address or the default IP address. You
can assign static IP addresses to connected devices rather than allowing the
security appliance to act as a DHCP server. See Configuring the VLAN,
page 118.
• VLAN Configuration: The security appliance predefines a native VLAN
(DEFAULT) and a guest VLAN (GUEST). You can customize new VLANs for
your specific business needs. See Configuring the VLAN, page 118.
• Configurable Ports: By default, all configurable ports are set to act as LAN
ports. Alternatively, you can configure the configurable port for use as a DMZ
port or a secondary WAN port. See Configuring the WAN, page 101 or
Configuring the DMZ, page 123.
• Wireless Network (for ISA550W and ISA570W only): The ISA550W or
ISA570W is configured with four SSIDs. All SSIDs are disabled by default.
For security purposes, we strongly recommend that you configure the SSIDs
with the appropriate security settings. See Wireless Configuration for
ISA550W and ISA570W, page 157.
• Administrative Access: You can access the Configuration Utility by using a
web browser and entering the default LAN IP address of 192.168.1.1. You
can log into by entering the username and password of the default
administrator account. You are forced to change the default username and
password after the first login. See Changing the User Name and Password
of the Default Administrator Account at Your First Login, page 27. You
also may want to change the user login settings for authentication. See
Configuring the User Authentication Settings, page 277.