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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 $1}' | sort | uniq -c | sort -nr | head -10
銴鋆賭誨蝣
6 g/ O+ ]# |0 N: N6 R
隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅7 W  t7 Y7 _' V2 T* b0 K( R( w
撠 IP
  1. iptables -A INPUT -p all -s x.x.x.x/32 -j DROP
銴鋆賭誨蝣
閫文 IP
  1. iptables -D INPUT -p all -s x.x.x.x/32 -j DROP
銴鋆賭誨蝣
隞乩:, n* r5 \' L. z3 e9 d
https://www.phpini.com/linux/linux-netstat-detect-ddos
0 G/ A0 D$ `5 q) {https://www.phpini.com/linux/count-ip-connections
9 D& t5 q0 l4 a; Q2 M* D. L! C6 Nhttps://www.phpini.com/linux/netstat-check-connections
9 J* @! A' T5 i+ |=================================================
6 ^1 k9 D( m. |9 U! n; p0 a血嚗
1 r. x! m- H0 X" Z5 q2 ^" z亥岷芯port鋡怠芯函撘雿剁
0 b. j7 X6 F4 p* @' t3 Z1.)
  1. netstat -tulpn | grep LISTEN
銴鋆賭誨蝣
2.)
  1. lsof -i -P -n | grep LISTEN
銴鋆賭誨蝣
3.)
  1. sudo nmap -sT -O localhost
銴鋆賭誨蝣
=================================================4 ^5 [6 v  j! G0 A) K5 ?
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
4 ^$ f; x  a1 P! ]: e

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