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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 |甇摨閬 |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

4 l: U6 E2 ?# m7 u6 W8 u隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅
9 }" U; Z# u: V. f5 P6 C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:
0 o: ~4 i( ?( b; ]1 L1 a6 X9 X6 ?https://www.phpini.com/linux/linux-netstat-detect-ddos1 x% @! u: c* O
https://www.phpini.com/linux/count-ip-connections
2 K% g6 `: e( }( N1 \5 v' M4 a7 U; Xhttps://www.phpini.com/linux/netstat-check-connections4 x: ~- x* j! U% U& z  Z: I9 d
=================================================& l0 P' S- |1 P' A3 M9 x. m. ?
血嚗6 y4 t7 i5 n- T) l+ ?4 n3 \
亥岷芯port鋡怠芯函撘雿剁
' }3 u: Y8 \! `4 Q. C7 H1.)
  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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=================================================; H4 ^% `! R8 w1 U/ N1 s: Z9 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/16448361 H- N& n5 Z3 T1 d4 I0 B( N- g

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