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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

. @& I" l- h) G, p' H) {" u隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅
, X1 y' \9 k* Q, T' I, o* o6 L5 I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:2 n/ j+ I5 l& o0 D5 T+ t
https://www.phpini.com/linux/linux-netstat-detect-ddos
# l! @8 f7 S4 T  l  l, |https://www.phpini.com/linux/count-ip-connections
8 x: T2 B+ y% f8 l& L( x! b. X; w  xhttps://www.phpini.com/linux/netstat-check-connections* N7 t/ h! X7 z/ E* c
=================================================
% `  ]) x' ?0 e0 s. K' x" t血嚗
1 B0 a$ H3 a% f5 L5 M/ t  J) j" u) n亥岷芯port鋡怠芯函撘雿剁# T8 w3 L3 y* q% o
1.)
  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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=================================================
( V$ {0 a6 M. w% E& |' @5 h* z1 r+ 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
7 n: ?2 k; H/ h2 Z

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