Firewall – Internet access through ASA firewall

cisco-asafirewall

I am new to ASA firewall. I have ASA 5520 firewall (hardware) I want my clients in my Local network to gain internet access through the firewall. So it should be like this:
ISP to Billion modem to Firewall (hardware) to Switch to client.

Best Answer

though your question is really vague I think you should do source NAT for internet access for your clients (aka MASQUERADE)

imagine your client network 192.168.1.0 with a subnet mask of 255.255.255.0

you should config this with CLI (supposing you have configured everthing else such as interfaces and security-levels etc) :

object network myclients
 subnet 192.168.1.0 255.255.255.0 
 nat (inside,outside) dynamic interface

reference :http://www.cisco.com/c/en/us/td/docs/security/asa/asa83/configuration/guide/config/nat_objects.html

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