Networking
Configuring the LAN
Cisco SA500 Series Security Appliances Administration Guide 43
2
Configuring the LAN
For most applications, the default DHCP and TCP/IP settings of the security
appliance are satisfactory. However, you can use the LAN Configuration page to
change these and other settings.
• About the Default LAN Settings
• Configuring the LAN
• Viewing the LAN Status
• VLAN Configuration
• DHCP Reserved IPs
• DHCP Leased Clients
• Configuring an IGMP Proxy
• Configuring the Optional Port as a LAN Port
About the Default LAN Settings
• By default the LAN of the router is configured in the 192.168.75.0 subnet
and the LAN IP address of the router is 192.168.75.1.
• By default, the security appliance acts as a Dynamic Host Configuration
Protocol (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. With DHCP enabled, the IP address of the
security appliance is the gateway address to your LAN. If you want another
PC on your network to be the DHCP server or if you are manually
configuring the network settings of all of your PCs, disable DHCP and enter
the appropriate settings.
• Instead of using a DNS server, you can use a Windows Internet Naming
Service (WINS) server. A WINS server is the equivalent of a DNS server but
uses the NetBIOS protocol to resolve hostnames. The security appliance
includes the WINS server IP address in the DHCP configuration when
acknowledging a DHCP request from a DHCP client.
• By default, your LAN is configured for IPv4 addressing. If you need to enable
IPv6 addressing, see Configuring IPv6 Addressing, page 77 and
Configuring the IPv6 LAN, page 80.
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