防FTP猜密码登录 脚本原理: 通过ROS响应FTP请求. 返回530登录错误.以下脚本为 在一分钟内允许10次登录失败,超过10次将阻止源IP访问三小时. 注意rule应用顺序及chain
/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/1m
add chain=output action=add-dst-to-address-list protocol=tcp content="530 Login incorrect" address-list=ftp_blacklist address-list-timeout=3h
防SSH暴力猜解密码 脚本原理: 这是一套组合拳. 通过匹配ssh新连接.三次登录未成功,将阻止源地址访问ssh.
/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