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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

0 S4 ~8 ^3 X+ i$ @7 Q隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅+ k9 T+ h7 O5 k2 K( \" p* i+ Y
撠 IP
  1. iptables -A INPUT -p all -s x.x.x.x/32 -j DROP
銴鋆賭誨蝣
閫文 IP
  1. iptables -D INPUT -p all -s x.x.x.x/32 -j DROP
銴鋆賭誨蝣
隞乩:" L: m) k6 @8 X& _- [4 r
https://www.phpini.com/linux/linux-netstat-detect-ddos
8 T$ w6 i' |0 n7 k0 H% rhttps://www.phpini.com/linux/count-ip-connections/ |1 s& h* _! H
https://www.phpini.com/linux/netstat-check-connections7 T, n1 f& I/ f3 V& I  {
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亥岷芯port鋡怠芯函撘雿剁$ u# v* K$ i& ^8 q+ U
1.)
  1. netstat -tulpn | grep LISTEN
銴鋆賭誨蝣
2.)
  1. lsof -i -P -n | grep LISTEN
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3.)
  1. sudo nmap -sT -O localhost
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=================================================1 J: ^4 V  E4 q. l# d/ ], n
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/ n4 x  _8 U8 [3 P

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