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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

) z4 i: \7 R* ]) a1 @5 k隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅5 R$ m: n4 h# s1 n" ^
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 g2 T4 a' K' ~2 G3 H! vhttps://www.phpini.com/linux/linux-netstat-detect-ddos
7 ?( [: n% {! [  r2 w2 Lhttps://www.phpini.com/linux/count-ip-connections" ~7 o: ]0 s1 Z5 R$ I
https://www.phpini.com/linux/netstat-check-connections. j( h3 `$ i# A# H8 N) [
=================================================5 A1 W$ L; |( D' Z, |  Y# j
血嚗  U& {$ ?! c2 N3 E# W9 `
亥岷芯port鋡怠芯函撘雿剁
+ ~+ J$ i; p+ O, W1.)
  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
=================================================  m/ N2 S" x5 k" ~7 O( b" X
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
# {' f9 R$ S# F/ h8 T( ^

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