> trying to stop a C&C server of a botnet is a futile exercise.
Laptop users who want broad Internet access (and will complain loudly if reddit/HN/Twitter is "down") aren't the same thing as the app server that only talks to a short whitelisted set of RFC1918 IPs, on specific ports only, and doesn't have Internet access - not even DNS. (WannaCry demonstrated why not.)
Reddit and the like needs to accept they are hosting botnet C&C servers due to hosting loads of user-generated content (I'd do an invite-only subreddit with a tracking pixel in the CSS), but that doesn't make it pointless for the rest of us to do something where possible.
Laptop users who want broad Internet access (and will complain loudly if reddit/HN/Twitter is "down") aren't the same thing as the app server that only talks to a short whitelisted set of RFC1918 IPs, on specific ports only, and doesn't have Internet access - not even DNS. (WannaCry demonstrated why not.)
Reddit and the like needs to accept they are hosting botnet C&C servers due to hosting loads of user-generated content (I'd do an invite-only subreddit with a tracking pixel in the CSS), but that doesn't make it pointless for the rest of us to do something where possible.