Problems by blocking TCP Packets

RouterOS General
1

Hi,

i try to block following Packets on my Router:

tshark tcp port 80
  0.787910 151.46.220.237 -> [b]{ MY IP } [/b] TCP 37424 > http [SYN] Seq=0 Win=512 Len=0
  0.787913 151.46.220.244 -> [b]{ MY IP } [/b] TCP 36658 > http [SYN] Seq=0 Win=512 Len=0
  0.787915 151.46.220.245 -> [b]{ MY IP } [/b] TCP 19989 > http [SYN] Seq=0 Win=512 Len=0
  0.787917 151.46.220.243 -> [b]{ MY IP } [/b] TCP 25404 > http [SYN] Seq=0 Win=512 Len=0

/ip firewall filter add chain=forward dst-address={ MY IP } /32 packet-size=0 action=drop

But dont work.