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[linux隞也 netstat 瑼X IP 蝺賊撠 IP

[銴鋆賡包
頝唾唳摰璅撅
璅銝
潸” 2017-2-13 08:41:52 | 芰閰脖 撣 |摨閬 |梯璅∪
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:
  1. 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:
  1. 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
  1. netstat -atnp -A inet | grep ":80" | awk -F " " '{print $5}' | awk -F ":" '{print $1}' | sort | uniq -c | sort -nr | head -10
銴鋆賭誨蝣
% m. Y' C. w# ~+ a
隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅
' |+ M/ H* L% a3 a! Q$ a撠 IP
  1. iptables -A INPUT -p all -s x.x.x.x/32 -j DROP
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閫文 IP
  1. iptables -D INPUT -p all -s x.x.x.x/32 -j DROP
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隞乩:
' @3 [) b7 u5 |$ Thttps://www.phpini.com/linux/linux-netstat-detect-ddos" W+ K8 k0 n5 ]/ A2 G$ O( M2 h
https://www.phpini.com/linux/count-ip-connections3 ]) h1 P* n/ t6 y6 D  }# }3 t
https://www.phpini.com/linux/netstat-check-connections
/ k7 Z" h; L5 F. `7 n9 g) m=================================================2 Y) }/ G9 P* Q# D) T5 S
血嚗
) v2 @( C! i+ A' S+ I亥岷芯port鋡怠芯函撘雿剁& f4 B! A( G  P$ p8 P, q1 t4 |/ f7 {
1.)
  1. netstat -tulpn | grep LISTEN
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2.)
  1. lsof -i -P -n | grep LISTEN
銴鋆賭誨蝣
3.)
  1. sudo nmap -sT -O localhost
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=================================================
* {: @0 x: i% U, v* V4 a8 z亥岷port雿函backlog
  1. ss -nlt
銴鋆賭誨蝣
backlog閰脣憭改 嚗 https://cloud.tencent.com/developer/article/16448360 M" ]' {1 W4 c. {6 t

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