Tutorial On How To Configure The Cisco ASA 5505 Firewall

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I want to set up a small firewall model for branch office purpose but it should have superior capability like others in series. Give a basic step-by-step procedure on how to configure the Cisco ASA 5505 firewall?

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Tutorial On How To Configure The Cisco ASA 5505 Firewall


First of all, make sure that you have a static public IP Address in the range of

Now, let’s see the basic tutorial steps on configuring a Cisco ASA 5505 firewall:

  • Configure the internal interface VLAN 1:

It includes nameif inside, security-level 100, IP Address –, and no shut.

  • Configure the external interface VLAN 2:

It includes nameif outside, security-level 0, IP Address –, and no shut.

  • Assign Ethernet 0/0 to VLAN 2:

It includes switchport access VLAN 2, and no shut.

  • Enable the rest interfaces with no shut:

It includes interface Ethernet 0/1.

  • Configure PAT on the outside interface:

It includes global (outside) 1 interface and NAT inside –

  • Configure default route:

Assume the default gateway is

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