I would like to use ASDM to block my users from accessing certain websites. I am using ASDM 7.9 on ASA 5508. For instance, a url like Facebook, has multiple IP addresses. Any suggestions? Thank you.
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You could try using FQDNs in the access-list, example:-
....but a proper web proxy would be a better solution than doing this on the ASA.
@wynneitmgr Yes, much more features than an ASA. Alternatively if you were running FTD software (instead of ASA) with the URL filtering license, you'd be able to better filter traffic based on the URL, but less features than a dedicated web proxy.
I was never suggesting editing host files to block the URLs.
If you just want to block facebook, you can use any of the options suggested....however a web proxy is probably a better solution, imo.
Thanks for the clarification. I guess I am not familiar with setting up a web proxy. I will have to do some research on how to do that. Do you know if there is any good documentation online that I can read? Thanks!!
check the information help you : ( what model of ASA , do you have IPS module ?)