Firewall Anti Brutuce Force

Firewall anti brutuce force mikrotik, drop ssh brute forcers, drop ssh brute downstream


/ip firewall filter
add chain=input protocol=tcp dst-port=21\
src-address-list=ftp_blacklist action=drop \
comment="drop ftp brute forcers"

add chain=output action=accept protocol=tcp\
content="530 Login incorrect" dst-limit=1/1m,9,dst-address/1madd chain=output action=add-dst-to-address-list protocol=tcp\
content="530 Login incorrect" address-list=ftp_blacklist \
address-list-timeout=3h

add chain=input protocol=tcp dst-port=22\
src-address-list=ssh_blacklist action=drop \
comment="drop ssh brute forcers" disabled=no

add chain=input protocol=tcp dst-port=22 connection-state=new \
src-address-list=ssh_stage3 action=add-src-to-address-list \
address-list=ssh_blacklist address-list-timeout=10d\
comment="" disabled=no

add chain=input protocol=tcp dst-port=22 connection-state=new \
src-address-list=ssh_stage2 action=add-src-to-address-list\
address-list=ssh_stage3 address-list-timeout=1m\
comment="" disabled=no

add chain=input protocol=tcp dst-port=22\
connection-state=new src-address-list=ssh_stage1 \
action=add-src-to-address-list address-list=ssh_stage2\
address-list-timeout=1m comment="" disabled=no

add chain=input protocol=tcp dst-port=22 connection-state=new \
action=add-src-to-address-list address-list=ssh_stage1 \
address-list-timeout=1m comment="" disabled=no

add chain=forward protocol=tcp dst-port=22\
src-address-list=ssh_blacklist action=drop \
comment="drop ssh brute downstream" disabled=no


source: forummikrotik.com

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