Hi some of my ips sent bandwidth to ips with smb protocol and i want to block SMB on my network on mikrotik how can i do this ? i didnt see anything on this forum

In the forwarding chain, add a rule which drops packet whose dst-port=445

In the forwarding chain, add a rule which drops packet whose dst-port=445

i do this but nothing happend smb steal open

Make sure that the rule comes before any other rule that would accept the packets.

For instance, if there's a rule in the forward chain which accepts all packets when out-interface=WAN, and if this rule comes before (above) your "block SMB" rule, then the block rule is never going to get a chance to match because the firewall stops as soon as it matches a packet. (just drag your block rule higher up the list - (preferably after the "accept connection-state=established,related" rule)

I am puzzled by this and to me you are sending out to random addresses or to addresses that you are already were talking to.

viewtopic.php?f=13&t=121584&hilit=:445