awk, cut, sort, uniq 隞, 臭誑啣箸 ip 蝺賊, 銝衣券蝺賊摨勗撠, 隞乩撠 TCP ESTABLISHED 蝺瑼X:- netstat -an|grep ESTABLISHED|awk '/^tcp/ {print $5}'|awk -F: '{print $1}'|sort|uniq -c|sort -nr|more
銴鋆賭誨蝣 撠 port 80 蝺, 撠瘥 ip 蝺賊啣箔蒂脰摨:- netstat -ntu | grep :80 | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr|more
銴鋆賭誨蝣 箸憭交貊 10 IP 園交賂嗡葉 :80 舫亙嚗舀寞唾瑼X亦- netstat -atnp -A inet | grep ":80" | awk -F " " '{print $5}' | awk -F ":" '{print $1}' | sort | uniq -c | sort -nr | head -10
銴鋆賭誨蝣
' o' u9 a1 y( F9 v }5 I* V隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅
/ h- i- ?6 Z9 B撠 IP- iptables -A INPUT -p all -s x.x.x.x/32 -j DROP
銴鋆賭誨蝣 閫文 IP- iptables -D INPUT -p all -s x.x.x.x/32 -j DROP
銴鋆賭誨蝣 隞乩:3 q9 _+ j7 t H+ M
https://www.phpini.com/linux/linux-netstat-detect-ddos2 h" d# Y1 E, p9 q6 o" d$ M4 _% T# q
https://www.phpini.com/linux/count-ip-connections+ H4 H+ `! L' m
https://www.phpini.com/linux/netstat-check-connections0 m5 n3 o6 r9 i8 N% l3 a
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亥岷芯port鋡怠芯函撘雿剁: B3 F. G7 S7 ~ P
1.)- netstat -tulpn | grep LISTEN
銴鋆賭誨蝣 2.)- lsof -i -P -n | grep LISTEN
銴鋆賭誨蝣 3.)- sudo nmap -sT -O localhost
銴鋆賭誨蝣 =================================================+ M0 w" w6 S9 e2 n7 t( u Y) c0 P
亥岷port雿函backlogbacklog閰脣憭改 嚗 https://cloud.tencent.com/developer/article/1644836& W' b0 Q/ O5 h* J
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