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http://serverfault.com/questions/275669/ssh-sshd-how-do-i-set-max-login-attempts4 ?7 N9 Z5 C E3 z" Z, `- |6 K
http://www.cnblogs.com/taosim/articles/3134394.html
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1) /etc/ssh/sshd_config乩銝銵/ Y2 U. f& C: E
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2) 券脩怎乩閬
% B1 N+ ^! l# N) h- iptables -N SSHATTACK
' `: T) v& M3 l" `6 E w' Q/ T - iptables -A SSHATTACK -j LOG --log-prefix "Possible SSH attack! " --log-level 70 W4 Y& `( h' T Z4 Q7 e! Q! l0 X
- iptables -A SSHATTACK -j DROP
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3) /var/log/syslog 閫撖航賜ssh餅
% z! c9 A9 [" D; _' U* f! B$ A: b- 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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潸” 2016-4-15 12:34:32
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