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頝唾唳摰璅撅
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潸” 2016-4-15 12:34:32 | 芰閰脖 撣 |摨閬 |梯璅∪
隞乩:$ E3 Y" R! p7 m% L4 \; F
http://serverfault.com/questions/275669/ssh-sshd-how-do-i-set-max-login-attempts
. Y3 b' y4 q# a# m1 _http://www.cnblogs.com/taosim/articles/3134394.html, `% P0 k2 j# M: b4 ~3 t/ s

4 H; c$ i1 K! R; ~4 k1) /etc/ssh/sshd_config乩銝銵
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  1. MaxAuthTries 1
銴鋆賭誨蝣

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2) 券脩怎乩閬4 K$ A& ]3 l0 B8 c% V$ L
  1. iptables -N SSHATTACK5 j% s: b- p6 u$ P
  2. iptables -A SSHATTACK -j LOG --log-prefix "Possible SSH attack! " --log-level 7
    4 g, x  x  P6 r" ~
  3. iptables -A SSHATTACK -j DROP
銴鋆賭誨蝣
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0 w9 T- a% M0 l" M: k2 A) f3 t3) /var/log/syslog 閫撖航賜ssh餅5 y% k( ~( G4 s. J6 o' [
  1. Dec 27 18:01:58 ubuntu kernel: [  510.007570] Possible SSH attack! IN=eth0 OUT= MAC=01:2c:18:47:43:2d:10:c0:31:4d:11:ac:f8:01 SRC=192.168.203.129 DST=192.168.203.128 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=30948 DF PROTO=TCP SPT=53272 DPT=1785 WINDOW=14600 RES=0x00 SYN URGP=0
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