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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 $1}' | sort | uniq -c | sort -nr | head -10
銴鋆賭誨蝣
% Y- ^5 V# p& T; j, Q3 ]; M- @
隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅
4 K; a% M; X0 @1 U, }. ]撠 IP
  1. iptables -A INPUT -p all -s x.x.x.x/32 -j DROP
銴鋆賭誨蝣
閫文 IP
  1. iptables -D INPUT -p all -s x.x.x.x/32 -j DROP
銴鋆賭誨蝣
隞乩:2 d  ]3 |5 t  Y1 O
https://www.phpini.com/linux/linux-netstat-detect-ddos$ L0 |# v0 [) H8 k' @8 W, n) B7 U
https://www.phpini.com/linux/count-ip-connections9 ~" {2 v; v8 b! x3 `5 f3 |2 t
https://www.phpini.com/linux/netstat-check-connections
' A8 P8 T- P0 J5 C1 q; T=================================================" ~0 M: ^- n% ~( B& S
血嚗
# u' B. w0 ^% Z亥岷芯port鋡怠芯函撘雿剁
0 d) a$ ~( K1 ^0 J1.)
  1. netstat -tulpn | grep LISTEN
銴鋆賭誨蝣
2.)
  1. lsof -i -P -n | grep LISTEN
銴鋆賭誨蝣
3.)
  1. sudo nmap -sT -O localhost
銴鋆賭誨蝣
=================================================4 Q+ A- l7 c  j* F
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
3 z+ {" [$ L  K4 }, |1 Y

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