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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 $1}' | sort | uniq -c | sort -nr | head -10
銴鋆賭誨蝣
) D" a4 R% `+ _% R
隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅3 O# Y- @( d( I+ ?: J: t& w. i6 i
撠 IP
  1. iptables -A INPUT -p all -s x.x.x.x/32 -j DROP
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閫文 IP
  1. iptables -D INPUT -p all -s x.x.x.x/32 -j DROP
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隞乩:/ Z$ F: q! m7 G6 C
https://www.phpini.com/linux/linux-netstat-detect-ddos
& z7 {  w% f; ~. e3 k8 D6 u+ H' Ghttps://www.phpini.com/linux/count-ip-connections
0 v) b! z2 }. |) m# s- Phttps://www.phpini.com/linux/netstat-check-connections) J. y! C$ P; v
=================================================
: ?6 x, Z0 T  {2 V5 M血嚗
: Z& n; T4 t2 i亥岷芯port鋡怠芯函撘雿剁
! G4 k! @( o" I  ]) r; `5 E1.)
  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
銴鋆賭誨蝣
=================================================
. A: t1 t0 c  A. Q" g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/16448360 f& r; z+ ~' ]  O

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