I recently setup BGP with a couple ISPs but I am not having any issues on the BGP setup itself, that works perfectly. The issue I am having is I bought a /24 block off an Auction site, since ARIN is no longer giving any out this was my only option, and it seems this block was HEAVILY used, when I go to the connections log there are IPs from everywhere trying to connect to anything and everything.
So my question is, is there a way to setup a script or some sort of filtering to drop or add the source IPs to a blacklist. All of these connections are just constantly in a "Syn Sent" state, I attached a screenshot of a small portion of the connection log, there are many more.