I have an ASA 5510. Is it possible to filter incoming traffic and only allow traffic from a specific ip address to access a specific URL on my application server? I want others to be able to access other URL on my application server.
Yes you can do exactly that using the URL filtering features of the ASA. However, you need to setup a filtering server for the ASA to send it's queries to. You need to have either a Websense or an N2H2 server.