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Step 5: Configure PAT on the outside interfaceĪSA5505 (config)# global (outside) 1 interfaceĪSA5505 (config)# nat (inside) 1 0.0.0.0 0.0.0.0įrom March 2010, Cisco announced the new Cisco ASA software version 8.3. Step 4: Enable the rest interfaces with no shut Step 2: Configure the external interface vlan (connected to Internet)ĪSA5505 (config-if)# ip address 200.200.200.1 255.255.255.0ĪSA5505 (config-if)# switchport access vlan 2 That is, you cannot configure the physical ports as Layer 3 ports, rather you have to create interface VlANs and assign the Layer 2 interfaces in each VLAN.īy default, interface Ethernet0/0 is assigned to VLAN 2 and its the outside interface (the one which connects to the Internet), and the other 7 interfaces (Ethernet0/1 to 0/7) are assigned by default to VLAN 1 and are used for connecting to the internal network.īasic Steps to Configure Cisco ASA 5505 : The difference of the 5505 model from the bigger ASA models is that it has an 8-port 10/100 switch which acts as Layer 2 only. Moreover, the performance of the ASA 5505 appliance supports 150Mbps firewall throughput and 4000 firewall connections per second, which is more than enough for small networks. The Adaptive Security technology of the ASA firewalls offers solid and reliable firewall protection, advanced application aware security, denial of service attack protection and much more. Although this model is suitable for small businesses, branch offices or even home use, its firewall security capabilities are the same as the biggest models like 5510, 5520, 5540, etc. The Cisco ASA 5505 Firewall is the smallest model in the new 5500 Cisco series of hardware appliances.