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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
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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 $1}' | sort | uniq -c | sort -nr | head -10
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' n4 E9 X; S) \隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅2 f& J/ [1 y* @6 U# ?
撠 IP
  1. iptables -A INPUT -p all -s x.x.x.x/32 -j DROP
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閫文 IP
  1. iptables -D INPUT -p all -s x.x.x.x/32 -j DROP
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隞乩:
0 d! t, \- Q& A' i6 e$ shttps://www.phpini.com/linux/linux-netstat-detect-ddos
3 ]4 Q; g: J9 c/ K! [( p& Jhttps://www.phpini.com/linux/count-ip-connections
# \( I$ r' [9 ?# c' u4 Bhttps://www.phpini.com/linux/netstat-check-connections5 s9 o! F/ |9 @* v' p+ S% ?
=================================================
& q* F% H2 Q! b6 v血嚗
& v0 ^6 A$ A9 E* c' q亥岷芯port鋡怠芯函撘雿剁
% n8 K: u2 o2 `2 R% A/ O1.)
  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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=================================================/ n% k( w+ R' a
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/16448361 j2 m& c0 L6 a! H) v  i3 L+ k6 N% o

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