I have a DSL modem ( Thomson) at my home and Cisco ASA 5520. Currently the modem is used for providing internet to some PC's and its getting a DHCP ip address.
So how can i configure the ASA to work with ASA ?
I want to work on some practice labs
Please can someone help.
You can configure the ASA just like another PC. You can give it a static IP
in the range of DSL Modem inside address with DSL modem as the default
gateway (or you can configure the outside interface to get IP address via
DHCP with setroute option enabled). Then you can use interface IP (or any
other unused IP in the same range) for NAT. Since DSL modem will be the
default gateway, all traffic will be sent to DSL modem. DSL modem will apply
NAT again and send the traffic to the outside.
On the inside interface of the ASA, you can use whatever IP range you like
(something other than the outside IP range) and connect a workstation
directly to that interface. Make sure that the workstation points to ASA as
its default gateway. Configure NAT on the ASA so that the workstation IP
gets Natted when going out of the firewall.
Hope this helps.