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Simple Prevent Bruteforce In Mikrotik

Posted by Admin Tuesday, June 21, 2011 1 comments
/ip firewall filter add chain=input protocol=tcp dst-port=21
src-address-list=ftp_blacklist action=drop comment="Drop FTP brute forcers"
disabled=no

/ip firewall filter add chain=input protocol=tcp
connection-state=established action=accept comment="Allow packets belonging
to existing connections" disabled=no
/ip firewall filter add chain=input connection-state=related action=accept
comment="Allow packets related to existing connections" disabled=no

/ip firewall filter add chain=input protocol=tcp dst-port=22
connection-state=new src-address-list=safe action=accept comment="Allow SSH
safe hosts" disabled=no
/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
/ip firewall filter 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="SSH brute forcers blacklisting"
disabled=no
/ip firewall filter 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="SSH brute forcers the third stage"
disabled=no
/ip firewall filter 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="SSH brute forcers the second stage"
disabled=no
/ip firewall filter 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="SSH brute forcers the first stage"
disabled=no

/ip firewall filter add chain=input protocol=tcp dst-port=8291
connection-state=new src-address-list=safe action=accept comment="Allow
WinBox safe hosts" disabled=no
/ip firewall filter add chain=input protocol=tcp dst-port=8291
src-address-list=wb_blacklist action=drop comment="Drop WinBox brute
forcers" disabled=no
/ip firewall filter add chain=input protocol=tcp dst-port=8291
connection-state=new src-address-list=wb_stage3
action=add-src-to-address-list address-list=wb_blacklist
address-list-timeout=10d comment="WinBox brute forcers blacklisting"
disabled=no
/ip firewall filter add chain=input protocol=tcp dst-port=8291
connection-state=new src-address-list=wb_stage2
action=add-src-to-address-list address-list=wb_stage3
address-list-timeout=1m comment="WinBox brute forcers the third stage"
disabled=no
/ip firewall filter add chain=input protocol=tcp dst-port=8291
connection-state=new src-address-list=wb_stage1
action=add-src-to-address-list address-list=wb_stage2
address-list-timeout=1m comment="WinBox brute forcers the second stage"
disabled=no
/ip firewall filter add chain=input protocol=tcp dst-port=8291
connection-state=new action=add-src-to-address-list address-list=wb_stage1
address-list-timeout=1m comment="WinBox brute forcers the first stage"
disabled=no

/ip firewall filter add chain=input protocol=tcp dst-port=22
connection-state=new action=accept comment="Allow SSH" disabled=no
/ip firewall filter add chain=input protocol=tcp dst-port=8291
connection-state=new action=accept comment="Allow WinBox" disabled=no
/ip firewall filter add chain=input protocol=tcp dst-port=20-21
connection-state=new action=accept comment="Allow FTP" disabled=no

/ip firewall filter add chain=input protocol=tcp dst-port=1337
action=add-src-to-address-list address-list=knock address-list-timeout=15s
comment="Port knocking the first stage" disabled=no
/ip firewall filter add chain=input protocol=tcp dst-port=7331
src-address-list=knock action= add-src-to-address-list address-list=safe
address-list-timeout=15m comment="Port knocking whitelisting" disabled=no

/ip firewall filter add chain=input action=drop comment="Drop everything
else"

/ip firewall filter add chain=output action=accept protocol=tcp content="530
Login incorrect" dst-limit=1/1m,9,dst-address/1m comment="Allow only 10 FTP
login incorrect answers per minute" disabled=no
/ip firewall filter add chain=output action=add-dst-to-address-list
protocol=tcp content="530 Login incorrect" address-list=ftp_blacklist
address-list-timeout=3h comment="FTP brute forcers blacklisting" disabled=no
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1 comments:

Никита Кокшаров said...

Thanks!

October 12, 2015 at 7:59 AM

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