1、先設置主機名
Router(config)#hostname
Router(config)#hostname R1
R1(config)#
2、設置域名
R1(config)#ip domain-name cisco.com
3、將用戶設置爲支持ssh客戶端接入
R1(config)#username cisco password cisco
4、生成用於保護會話的密鑰
R1(config)#cry?
crypto
R1(config)#crypto ?
key Long term key operations
R1(config)#crypto key ?
generate Generate new keys
zeroize Remove keys
R1(config)#crypto key g
R1(config)#crypto key generate ?
rsa Generate RSA keys
R1(config)#crypto key generate rsa ?
<cr>
R1(config)#crypto key generate rsa
% You already have RSA keys defined named xxxx.cisco.com .
% Do you really want to replace them? [yes/no]: yes
The name for the keys will be: R1.cisco
Choose the size of the key modulus in the range of 360 to 2048 for your
General Purpose Keys. Choosing a key modulus greater than 512 may take
a few minutes.
How many bits in the modulus [512]: 1024
% Generating 1024 bit RSA keys, keys will be non-exportable...[OK]
注意：5,6,7步，PT上都不支持
5、啓用ssh的第二版本
R1(config)#ssh version2
6、進入vty線路模式
R1(config)#line vty 0 15
7、講ssh和telnet作爲接入協議
R1(config)#transport input ssh telnet