Today i am going to post about the Security Appliance ( i.e Adapative Security Appliance )
Cisco Develops Security appliance for all kinds of customers vary from small , medium sized to large organizations.
Various models of ASA firewall :
1. Cisco 5505
2. Cisco 5510
3. Cisco 5520
4. Cisco 5540
5. Cisco 5550
6. Cisco 5580
7. Cisco 5585 X
Functional Overview of a Firewall :
Firewall Mode :
a. Routed Mode -
b. Transparent Mode -
-> A transparent firewall, on the other hand, is a Layer 2 firewall that acts like a "bump in the wire," or a "stealth firewall," and is not seen as a router hop to connected devices.
-> Layer 3 traffic, such as IP traffic, cannot pass through the security appliance unless you explicitly permit it with an extended access list.
-> The only traffice can pass through transparent firewall is ARP traffic which can be controlled by arp inspection
a. Routed Mode -
b. Transparent Mode -
-> A transparent firewall, on the other hand, is a Layer 2 firewall that acts like a "bump in the wire," or a "stealth firewall," and is not seen as a router hop to connected devices.
-> Layer 3 traffic, such as IP traffic, cannot pass through the security appliance unless you explicitly permit it with an extended access list.
-> The only traffice can pass through transparent firewall is ARP traffic which can be controlled by arp inspection
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