ROS防火墙-如何拒绝端口扫描

前言：

为保护路由器不受端口扫描的探测，我们可以记录下试图探测你的IP，并使用IP地址列表记录下，然后拒绝这些IP访问。

/ip firewall filter

add chain=input protocol=tcp psd=21,3s,3,1 action=add-src-to-address-list address-list=”port scanners” address-list-timeout=2w comment=”Port scanners to list ” disabled=no

TCP flags的各种端口扫描表现组合情况：

add chain=input protocol=tcp tcp-flags=fin,!syn,!rst,!psh,!ack,!urg action=add-src-to-address-list address-list=”port scanners” address-list-timeout=2w comment=”NMAP FIN Stealth scan”

add chain=input protocol=tcp tcp-flags=fin,syn action=add-src-to-address-list address-list=”port scanners”address-list-timeout=2w comment=”SYN/FIN scan”

add chain=input protocol=tcp tcp-flags=syn,rst action=add-src-to-address-list address-list=”port scanners”address-list-timeout=2w comment=”SYN/RST scan”

add chain=input protocol=tcp tcp-flags=fin,psh,urg,!syn,!rst,!ack action=add-src-to-address-list address-list=”port scanners” address-list-timeout=2w comment=”FIN/PSH/URG scan”

add chain=input protocol=tcp tcp-flags=fin,syn,rst,psh,ack,urg action=add-src-to-address-list address-list=”port scanners” address-list-timeout=2w comment=”ALL/ALL scan”

add chain=input protocol=tcp tcp-flags=!fin,!syn,!rst,!psh,!ack,!urg action=add-src-to-address-list address-list=”port scanners” address-list-timeout=2w comment=”NMAP NULL scan”

这里丢弃那些试图探测你的IP地址：

add chain=input src-address-list=”port scanners” action=drop comment=”dropping port scanners” disabled=no