Cisco ASA 5505 and my Roku

SOURCE: No power to cisco 5505 ASA

http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html

From the US, you can call: 1.800.553.2447

From there, Cisco will be able to tell you what your warranty status is by the device's serial number, and can also provide you with a quote if your warranty has expired.

SOURCE: how to connect the Cisco ASA 5505 firewall through lan cables?

A conflict in the IP address, resolve it

SOURCE: Cisco ASA 5505 firewall support URL filtering or

Hi, the Cisco ASA 5505 is the base model, and URL filtering is not available on this model. The first model that allows URL filtering is the 5510, and every model above that. You can view the models and features here:

http://www.cisco.com/en/US/products/ps6120/prod_models_comparison.html

SOURCE: how will block yahoo.com using cisco asa 5505

Hello there, you need to check this out

Regards

SOURCE: Cisco ASA 5505 Firmware

Yes, it is possible and Yes you have to purchase it from Cisco.
Sorry, that is how they make the big bucks.
Consider a service contract on the unit, then you can download the firmware much cheaper.