I don't test this one so wait me testing it and if i found error i'll fix it you.
Edit: I don't find this HLDS-SHIELD the author sell it. And all these methods not so good only use this one it's ban same ips the best for now although it's not so good but you must understand those fake players as you opened more than cs1.6 in your PC and connected from them all to your server. No way else THIS.