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 $1}' | sort | uniq -c | sort -nr | head -10
銴鋆賭誨蝣
* U+ W' l0 W0 L _1 Y" O隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅
2 h: w n6 A+ @ b4 V8 b/ W撠 IP- iptables -A INPUT -p all -s x.x.x.x/32 -j DROP
銴鋆賭誨蝣 閫文 IP- iptables -D INPUT -p all -s x.x.x.x/32 -j DROP
銴鋆賭誨蝣 隞乩:. ]5 l% U) ~; ^' K$ b% ]
https://www.phpini.com/linux/linux-netstat-detect-ddos: a$ [2 W9 C2 |/ S& Y
https://www.phpini.com/linux/count-ip-connections
4 E. {, q2 D. m3 s" A$ b- @7 l3 Fhttps://www.phpini.com/linux/netstat-check-connections7 k$ K& T+ t$ K: T2 H
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0 t- T/ O: V" S; J' {' R% ~/ `/ t3 P血嚗
S* G* n- o/ o) F6 W3 h亥岷芯port鋡怠芯函撘雿剁
& d6 g( w" _; b) g: ?; j; ^: p1.)- 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 =================================================. g1 H5 m3 |, a2 X4 l
亥岷port雿函backlogbacklog閰脣憭改 嚗 https://cloud.tencent.com/developer/article/1644836. {6 C7 c( |# b- K; E5 Z6 C
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