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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 $1}' | sort | uniq -c | sort -nr | head -10
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  k  E& k% e6 o. @% f% j# m' |隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅2 Z. d% q6 v9 `' q( E0 A& h  d% T
撠 IP
  1. iptables -A INPUT -p all -s x.x.x.x/32 -j DROP
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閫文 IP
  1. iptables -D INPUT -p all -s x.x.x.x/32 -j DROP
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隞乩:
3 H  r& s, C9 O* e4 ]; Thttps://www.phpini.com/linux/linux-netstat-detect-ddos, P) t) H3 X8 }! c4 P
https://www.phpini.com/linux/count-ip-connections  N1 v( Y! M: k. u: ~! e
https://www.phpini.com/linux/netstat-check-connections6 x& x0 g+ G; _& o: s) {& p+ m( C
=================================================
0 b: m: ?, F1 r( E$ d血嚗
! h  B$ P& N# N亥岷芯port鋡怠芯函撘雿剁" x# a! v5 T3 Y3 b
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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=================================================- U7 u5 G+ s9 Q. H# J8 i
亥岷port雿函backlog
  1. ss -nlt
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backlog閰脣憭改 嚗 https://cloud.tencent.com/developer/article/1644836. |7 T: n4 c% C

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