- October 5, 2019
- Posted by: Syed Shujaat
- Category: Uncategorized
Cisco ASA 5505 Basic Configuration
The Cisco ASA 5505 Firewall is the smallest model in the new 5500 Cisco series of hardware appliances. 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 (5510, 5520, 5540 etc).
We assume that our ISP has assigned us a static public IP address (e.g 18.104.22.168 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 outside interface.
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.
By default, interface Ethernet0/0 is assigned to VLAN 2 and its 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.
Notice from the diagram that port Ethernet0/0 connects to the Internet and ports Ethernet0/1 to 7 connect to internal hosts (PC computers etc).