Basic Configuration Tutorial For the Cisco Asa 5505 Firewall

The Cisco Asa 5505 Firewall is the smallest model in the new 5500 Cisco series of hardware appliances. Although this model is convenient for small businesses, subject offices or even home use, its firewall security capabilities are the same as the biggest models (5510, 5520, 5540 etc). The Adaptive security technology of the Asa firewalls offers solid and reliable firewall protection, industrialized application aware security, denial of assistance attack security and much more. Moreover, the execution of the Asa 5505 appliance supports 150Mbps firewall throughput and 4000 firewall connections per second, which is more than adequate for small networks.

In this report I will expound the basic configuration steps needed to setup a Cisco 5505 Asa firewall for connecting a small network to the Internet. We assume that our Isp has assigned us a static group Ip address (e.g 200.200.200.1 as an example) and that our internal network range is 192.168.1.0/24. We will use Port Address Translation (Pat) to translate our internal Ip addresses to the group address of the exterior interface. The variation 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. That is, you can not configure the bodily ports as Layer 3 ports, rather you have to create interface Vlans and assign the Layer 2 interfaces in each Vlan. By default, interface Ethernet0/0 is assigned to Vlan 2 and it's the exterior 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. Let's see the basic configuration setup of the most leading steps that you need to configure.

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Step1: Configure the internal interface vlan
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Asa5505(config)# interface Vlan 1
Asa5505(config-if)# nameif inside
Asa5505(config-if)# security-level 100
Asa5505(config-if)# ip address 192.168.1.1 255.255.255.0
Asa5505(config-if)# no shut

Basic Configuration Tutorial For the Cisco Asa 5505 Firewall

Step 2: Configure the external interface vlan (connected to Internet)
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Asa5505(config)# interface Vlan 2
Asa5505(config-if)# nameif outside
Asa5505(config-if)# security-level 0
Asa5505(config-if)# ip address 200.200.200.1 255.255.255.0
Asa5505(config-if)# no shut

Step 3: Assign Ethernet 0/0 to Vlan 2
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Asa5505(config)# interface Ethernet0/0
Asa5505(config-if)# switchport passage vlan 2
Asa5505(config-if)# no shut

Step 4: Enable the rest interfaces with no shut
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Asa5505(config)# interface Ethernet0/1
Asa5505(config-if)# no shut

Do the same for Ethernet0/1 to 0/7.

Step 5: Configure Pat on the exterior interface
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Asa5505(config)# global (outside) 1 interface
Asa5505(config)# nat (inside) 1 0.0.0.0 0.0.0.0

Step 6: Configure default route towards the Isp (assume default gateway is 200.200.200.2
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Asa5505(config)# route exterior 0.0.0.0 0.0.0.0 200.200.200.2 1

The above steps are the precisely vital steps you need to configure for manufacture the appliance operational. Of policy there are much more configuration details that you need to implement in order to heighten the security and functionality of your appliance, such as passage operate Lists, Static Nat, Dhcp, Dmz zones, authentication etc.

Visit my website in my resource box below for more data about Cisco products and solutions. You can also learn how to configure any Cisco Asa 5500 Firewall Here.

Basic Configuration Tutorial For the Cisco Asa 5505 FirewallAutoCAD Tutorial - Modify Panel - Fillet Command Video Clips. Duration : 14.80 Mins.

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