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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

% G  q/ a) V# ]8 d. U" h隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅* W5 d7 t3 `% M  ?' U- T2 m
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
銴鋆賭誨蝣
隞乩:9 D( O: p$ _& i& ?. P  G
https://www.phpini.com/linux/linux-netstat-detect-ddos+ F% Y* d; O" H6 Y5 ?
https://www.phpini.com/linux/count-ip-connections7 T' P5 u" O( J3 R
https://www.phpini.com/linux/netstat-check-connections
1 G( u( T0 ^3 }  b2 B=================================================) _  H- [( y5 E8 H
血嚗5 i/ H0 o  m/ j  T7 @
亥岷芯port鋡怠芯函撘雿剁
! J# o5 d. ]6 Q$ \1.)
  1. netstat -tulpn | grep LISTEN
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2.)
  1. lsof -i -P -n | grep LISTEN
銴鋆賭誨蝣
3.)
  1. sudo nmap -sT -O localhost
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=================================================/ y1 u! i# S( m: x
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+ @7 p) N. G% D6 q' z

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