1.设置密码输入错误次数：aaa local authentication attempts max-fail 3
2.设置密码长度、复杂性、有效期:
aaa common-criteria policy policy1
lifetime month 3
max-length 12
min-length 12
lower-case 1
numeric-count 1
special-case 1
upper-case 1
原文：http://www.cnblogs.com/xinghen1216/p/7800410.html