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[銴鋆賡包
頝唾唳摰璅撅
璅銝
潸” 2016-4-15 12:34:32 | 芰閰脖 撣 |甇摨閬 |梯璅∪
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http://serverfault.com/questions/275669/ssh-sshd-how-do-i-set-max-login-attempts
/ B' h+ F% m" w  Rhttp://www.cnblogs.com/taosim/articles/3134394.html
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! Z( p, t2 p* F2 m7 \" w1) /etc/ssh/sshd_config乩銝銵
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  1. MaxAuthTries 1
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  1. iptables -N SSHATTACK2 C3 V4 Y: {: J1 n1 D7 m
  2. iptables -A SSHATTACK -j LOG --log-prefix "Possible SSH attack! " --log-level 74 b# H) Q1 D- b, n. \$ r
  3. iptables -A SSHATTACK -j DROP
銴鋆賭誨蝣

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3) /var/log/syslog 閫撖航賜ssh餅+ g5 i" O+ l& p4 X
  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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