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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
1 ^5 W* k- M/ R' k: g
隞乩寞曉唬皞 ip 敺, 靘憒 ip x.x.x.x, 臭誑 iptables 餅餅7 Q6 X/ H! J8 ]  C0 h
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:
% s/ h4 b, t5 {+ a/ C& Qhttps://www.phpini.com/linux/linux-netstat-detect-ddos
! {7 D. L4 `: Ghttps://www.phpini.com/linux/count-ip-connections# h& E- o: r, r& G5 {6 |
https://www.phpini.com/linux/netstat-check-connections. E/ o% M  j% l/ P5 F
=================================================, ^5 U7 k+ m0 _7 D
血嚗4 A3 P, K1 W, r8 W+ e1 E# L
亥岷芯port鋡怠芯函撘雿剁
& H3 Q- y* B4 y5 ^1 k0 n1.)
  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
=================================================) S  ^8 L/ D; h& {& H0 s4 C: m1 w" m
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: z: a7 R  l1 c- I3 p! `4 J# s

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