telnet:
主要的TCP 服务例如telnet:
R1配置:
Router>enable
Router#configure terminal
Router(config)#line console 0 //配置线路console 口
Router(config-line)#exec-timeout 0 0 //设置超时为永不超时
Router(config-line)#logging synchronous //开启日志同步信息
Router(config-line)#exit
Router(config)#no ip do lo //关闭域名解析
Router(config)#ho Router0 //设置路由器的名称
Router0 (config)#interface f0/0
Router0 (config-if)#ip address 12.1.1.1 255.255.255.0
Router0 (config-if)#no shutdown
Router0 (config-if)#exit //在接口下配置IP地址
R2配置:
Router(config)#line console 0
Router(config-line)#exec-timeout 0 0
Router(config-line)#logging synchronous
Router(config-line)#exit
Router(config)#no ip do lo
Router(config)#ho Router2
Router2 (config)#interface f0/0
Router2 (config-if)#ip address 12.1.1.2 255.255.255.0
Router2 (config-if)#no shutdown
Router2(config-if)#exit
Router2 (config)#username 123 password 123 //设置用户名和密码
Router2 (config)#line vty 0 4 //设置登陆线路的接口
Router2 (config-line)#password 123 //设置线路密码
Router2 (config-line)#exit
Router2 (config)#enable password 123 //进入特权用户的密码
Router2 (config)#end
Router0#telnet 12.1.1.2 //进行telnet 登陆
Trying 12.1.1.2 ... Open
User Access Verification
Password:
SSH:
R1配置:
Router>enable
Router#configure terminal
Router(config)#line console 0 //配置线路console 口
Router(config-line)#exec-timeout 0 0 //设置超时为永不超时
Router(config-line)#logging synchronous //开启日志同步信息
Router(config-line)#exit
Router(config)#no ip do lo //关闭域名解析
Router(config)#ho Router0 //设置路由器的名称
Router0 (config)#interface f0/0
Router0 (config-if)#ip address 12.1.1.1 255.255.255.0
Router0 (config-if)#no shutdown
Router0 (config-if)#exit //在接口下配置IP地址
R1(config)#username 123 password cisco //设置登录使用的用户名密码信息
R1(config)#ip domain-name www.123.com //设置域名
R1(config)#crypto key generate rsa
The name for the keys will be: R1.www.123.com
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 512 bit RSA keys, keys will be non-exportable...[OK]
R1(config)#line vty 0 4
R1(config-line)#transport input ssh //打开ssh服务功能
R1(config-line)#login local
R1(config-line)#exit
R2配置:
Router(config)#line console 0
Router(config-line)#exec-timeout 0 0
Router(config-line)#logging synchronous
Router(config-line)#exit
Router(config)#no ip do lo
Router(config)#ho Router2
Router2 (config)#interface f0/0
Router2 (config-if)#ip address 12.1.1.2 255.255.255.0
Router2 (config-if)#no shutdown
Router2(config-if)#exit
R2#ssh -l 123 12.1.1.1 //ssh 登录
Password:
R1>