К посту http://pikabu.ru/story/mikrotik__odin_iz_luchshikh_domashnik...

fail2ban для микротика, коротко и просто, открываем через winbox - new terminal и копипастим сии строки

/ip firewall filter

add action=drop chain=input comment="drop ssh brute forcers" dst-port=22 protocol=tcp src-address-list=ssh_blacklist

add action=add-src-to-address-list address-list=ssh_blacklist address-list-timeout=1w3d chain=input connection-state=new dst-port=22 protocol=tcp src-address-list=ssh_stage3

add action=add-src-to-address-list address-list=ssh_stage3 address-list-timeout=1m chain=input connection-state=new dst-port=22 protocol=tcp src-address-list=ssh_stage2

add action=add-src-to-address-list address-list=ssh_stage2 address-list-timeout=1m chain=input connection-state=new dst-port=22 protocol=tcp src-address-list=ssh_stage1

add action=add-src-to-address-list address-list=ssh_stage1 address-list-timeout=1m chain=input connection-state=new dst-port=22 protocol=tcp

add action=drop chain=input comment="drop telnet brute forcers" dst-port=23 protocol=tcp src-address-list=telnet_blacklist

add action=add-src-to-address-list address-list=telnet_blacklist address-list-timeout=1w3d chain=input connection-state=new dst-port=23 protocol=tcp src-address-list=telnet_stage3

add action=add-src-to-address-list address-list=telnet_stage3 address-list-timeout=1m chain=input connection-state=new dst-port=23 protocol=tcp src-address-list=telnet_stage2

add action=add-src-to-address-list address-list=telnet_stage2 address-list-timeout=1m chain=input connection-state=new dst-port=23 protocol=tcp src-address-list=telnet_stage1

add action=add-src-to-address-list address-list=telnet_stage1 address-list-timeout=1m chain=input connection-state=new dst-port=23 protocol=tcp

add action=drop chain=input comment="drop winbox brute forcers" dst-port=8291 protocol=tcp src-address-list=winbox_blacklist

add action=add-src-to-address-list address-list=winbox_blacklist address-list-timeout=1w3d chain=input connection-state=new dst-port=8291 protocol=tcp src-address-list=winbox_stage3

add action=add-src-to-address-list address-list=winbox_stage3 address-list-timeout=1m chain=input connection-state=new dst-port=8291 protocol=tcp src-address-list=winbox_stage2

add action=add-src-to-address-list address-list=winbox_stage2 address-list-timeout=1m chain=input connection-state=new dst-port=8291 protocol=tcp src-address-list=winbox_stage1

add action=add-src-to-address-list address-list=winbox_stage1 address-list-timeout=1m chain=input connection-state=new dst-port=8291 protocol=tcp

По необходимости правим порты  на свои, добавляем копипастом необходимое.