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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
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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 $1}' | sort | uniq -c | sort -nr | head -10
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* U+ W' l0 W0 L  _1 Y" O隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅
2 h: w  n6 A+ @  b4 V8 b/ W撠 IP
  1. iptables -A INPUT -p all -s x.x.x.x/32 -j DROP
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閫文 IP
  1. iptables -D INPUT -p all -s x.x.x.x/32 -j DROP
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隞乩:. ]5 l% U) ~; ^' K$ 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
=================================================
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.)
  1. netstat -tulpn | grep LISTEN
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2.)
  1. lsof -i -P -n | grep LISTEN
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3.)
  1. sudo nmap -sT -O localhost
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=================================================. g1 H5 m3 |, a2 X4 l
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/1644836. {6 C7 c( |# b- K; E5 Z6 C

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