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Block IP yang berusaha login (FTP&SSH)
Males ngeliat log di mikrotik banyak yang berusaha login dengan sembarang username dari IP yg ngga dikenal? Nie coba deh, tak jamin bakalan seambrek IP2 yang iseng masuk address-list
Buat ngedrop yang coba login ke FTP mikrotik loe (10 kali gagal dlm 1 menit, masuk deh address-list)
/ip firewall filter
add chain=input protocol=tcp dst-port=21 src-address-list=ftp_blacklist action=drop
add chain=output action=accept protocol=tcp content="530 Login incorrect" dst-limit=1/1m,9,dst-address/1m
add chain=output action=add-dst-to-address-list protocol=tcp content="530 Login incorrect" \ address-list=ftp_blacklist address-list-timeout=3h
Kalo nyang nie buat ngeblock yang coba2 login ke SSH mikrotik loe, IPnye nongkrong 10 hari di address-list
in /ip firewall filter
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
Sumber : http://wiki.mikrotik.com
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