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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 |甇摨閬 |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 $1}' | sort | uniq -c | sort -nr | head -10
銴鋆賭誨蝣
# J' V9 o3 y. }& H  H- H% z
隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅$ m% e2 @# m! ]5 A! J
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:
9 N- K1 q7 t' l9 {; Ohttps://www.phpini.com/linux/linux-netstat-detect-ddos: H. K: a  n: b7 m  L5 ^# P0 `" K, Z2 ?
https://www.phpini.com/linux/count-ip-connections7 F! a/ _/ m) i. n8 ~
https://www.phpini.com/linux/netstat-check-connections
% G: m7 \4 a5 ~, S' [+ x9 y$ j=================================================
8 a0 i8 }( q3 a! ]血嚗9 u' r, ^* y' r0 v3 c8 u4 V& I7 a; Z
亥岷芯port鋡怠芯函撘雿剁
2 h, z, B! N3 X2 `' I+ V- Z1.)
  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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=================================================
" l9 f6 O- g8 ?2 F. Z$ o* c+ ^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
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