Cisco IOS基本安全配置详
line vty 0 4 access-class 1 in 使用acl 1来控制telnet的源地址login
password 0 rererkerlf 配置telnet密码
exec-timeout 2 0 配置虚终羰超时参数，这里是2分钟
!
line con 0
login
password 0 aeroer 配置console口的密码
exec-timeout 2 0 配置console口超时参数，这里是两分钟
!
line aux 0
transport input none
password 0 asfdkalsfj
no exec
exit
banner motd # 配置提示信息
This is a private system operated for UltraTeam.
Authorization from UltraTeam is required to use this system
Use by unauthorized persons is prohibited
#
!
clock timezone PST-8 设置时区
ntp authenticate 启用NTP认证
ntp authentication-key 1 md5 uadsf 设置NTP认证用的密码，使用MD5加密。需要和ntp server一致
ntp trusted-key 1 可以信任的Key.
ntp acess-group peer 98 设置ntp服务，只允许对端为符合access-list 98条件的主机
ntp server 192.168.0.1 key 1 配置ntp server，server为192.168.0.1，使用1号key做为密
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