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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 $1}' | sort | uniq -c | sort -nr | head -10
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7 ^5 C2 S1 H, I隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅
, K: q9 G$ B2 B2 ~+ [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:
) e- E- u& {; T7 |$ }# |# I' A4 @https://www.phpini.com/linux/linux-netstat-detect-ddos- m6 C0 \4 K* k8 f( S
https://www.phpini.com/linux/count-ip-connections- O6 x) g) W  H4 x: M5 \
https://www.phpini.com/linux/netstat-check-connections
! ]  x  b; }5 S: u' O& V=================================================; L3 K/ |. y* Y+ U% g0 e! G% f. j  ^! z
血嚗
: |! o& ~, C, f% ?: i亥岷芯port鋡怠芯函撘雿剁% C: S6 l2 w6 {; G' }" J# v
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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=================================================6 s2 {( V6 T6 e, j4 a: _/ V, e
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) a! _- x" a% ]9 x( i

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