B-37
Cisco Security Appliance Command Line Configuration Guide
OL-10088-01
Appendix B Sample Configurations
Example 15: ASA 5505 Security Plus License with Failover and Dual-ISP Backup
hostname Buster
asdm image disk0:/asdm.bin
boot system disk0:/image.bin
interface vlan 2
description Primary ISP interface
nameif outside
security-level 0
ip address 209.165.200.224 standby 209.165.200.225
backup interface vlan 4
no shutdown
interface vlan 1
nameif inside
security-level 100
ip address 192.168.1.1 255.255.255.0
no shutdown
interface vlan 3
nameif dmz
security-level 50
ip address 192.168.2.1 255.255.255.0
no shutdown
interface vlan 4
description Backup ISP interface
nameif backup-isp
security-level 0
ip address 209.168.202.128 standby 209.168.202.129
no shutdown
interface vlan 5
description LAN Failover Interface
interface ethernet 0/0
switchport access vlan 2
no shutdown
interface ethernet 0/1
switchport access vlan 4
no shutdown
interface ethernet 0/2
switchport access vlan 1
no shutdown
interface ethernet 0/3
switchport access vlan 3
no shutdown
interface ethernet 0/4
switchport access vlan 5
no shutdown
failover
failover lan unit primary
failover lan interface faillink vlan5
failover lan faillink vlan5
failover polltime unit 3 holdtime 10
failover key key1
failover interface ip faillink 10.1.1.1 255.255.255.0 standby 10.1.1.2
nat (inside) 1 0 0
nat (home) 1 0 0
global (outside) 1 interface
! The previous NAT statements match all addresses on inside and home, so you need to
! also perform NAT when hosts access the inside or home networks (as well as the outside).
! Or you can exempt hosts from NAT for inside <--> home traffic, as effected by the
! following:
access-list natexmpt-inside extended permit ip any 192.168.2.0 255.255.255.0
access-list natexmpt-home extended permit ip any 192.168.1.0 255.255.255.0
nat (inside) 0 access-list natexmpt-inside
nat (home) 0 access-list natexmpt-home
sla monitor 123
type echo protocol ipIcmpEcho 209.165.200.234 interface outside
num-packets 2
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