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, field offices or even home use, its firewall safety capabilities are the same as the biggest models (5510, 5520, 5540 etc). The Adaptive safety technology of the Asa firewalls offers solid and dependable firewall protection, industrialized application aware security, denial of service attack safety and much more. Moreover, the carrying out of the Asa 5505 appliance supports 150Mbps firewall throughput and 4000 firewall connections per second, which is more than sufficient for small networks.

Basic Configuration Tutorial For the Cisco Asa 5505 Firewall

Basic Configuration Tutorial For the Cisco Asa 5505 Firewall

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Basic Configuration Tutorial For the Cisco Asa 5505 Firewall

Basic Configuration Tutorial For the Cisco Asa 5505 Firewall

In this record I will account for 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 public 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 public address of the exterior interface. The discrepancy 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 corporeal 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 foremost steps that you need to configure.

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

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 entrance 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 certainly indispensable steps you need to configure for making the appliance operational. Of policy there are much more configuration details that you need to implement in order to improve the safety and functionality of your appliance, such as entrance control Lists, Static Nat, Dhcp, Dmz zones, authentication etc.

Visit my website in my reserved supply box below for more information 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 Firewall

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Ip Address - 192-168-1-1

The Internet Protocol (Ip) address is an exclusive address used by computers for a computer network in the identification and transportation processes. It is used as an identifier to recognize electronic devices linked on a network. Hence each gadget is subjected to a unique address.

Ip Address - 192-168-1-1

Ip Address - 192-168-1-1

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Ip Address - 192-168-1-1

Ip Address - 192-168-1-1

The 192.168.1.1 is a personal Ipv4 network address, situated in in the middle of 192.168.0.0 to 192.168.255.255. Any brands of network router or computer on a local network can be configured to use this address. However it is restricted to only one gadget on the network to prevent address conflicts.

Private addresses are unusual because they can be used complicated times on separate networks. In other words, having the same Ip address in separate networks simultaneously would not cause conflicts or interferences. Yet somehow privates address ranges are said to be non-routable. That is, these addresses are not capable of communicating in the internet since internet routers are set to obstruct the entry of traffic delivered through underground addresses.

This would appear to be a downside of underground addresses but somehow it could be an advantage. Since the outer networks cannot connect to the underground network, it would not be vulnerable to invasive elements by irresponsible lively or nasty users. However transportation with outside networks may be necessary. Should there is a need to link to other networks; the underground address would have to experience a gateway in order for other networks to detect the underground address. The router must also allow internet transmission in the middle of the two networks. For this to take place, you need the Network Address Translation (Nat) or any proxy server. Nevertheless, you should take note that the two networks might have the same Ip address. The occurrence of such situations may consequent in conflicts and it would be difficult to establish. The Nat gadget resembles the router or firewall where it modifies information to be sent to the internet to regain a general address to be used.

There may be arousal of problems to way the router through 192.168.1.1 due to unacceptable browser settings. To overcome such circumstances, the browser settings should be cleared and the anti-malware and firewall should be disabled.

Other default Ip addresses comprise 192.168.2.1 and 192.168.0.1. These addresses have been defined by Rfc 1918 which have been working on the internet explore and development. There are numerous Nat or other network devices using this as their default underground Ip address.

Ip Address - 192-168-1-1

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