远程管理

远程管理

一、Telnet

​ telnet: tcp 23端口

实验拓扑

image-20241205151149758

TCP三次握手

建立连接

  • AR1 --- Syn --- > seq=0 ack= 0
  • AR2 --- Syn, Ack ---- > seq=0 ack=1
  • AR1 --- Ack --- > seq=1 ack=1

image-20241205151539440

image-20241205152116452

image-20241205152239355

可靠传输

  • 面向连接
  • 确认：acknowledge
  • 拥塞避免： windows滑动窗口

缺点：不安全，密码能被抓取

image-20241205154022791

二、STelnet

[AR2]user-interface vty 0 4 
[AR2-ui-vty0-4]authentication-mode aaa 
[AR2-ui-vty0-4]protocol inbound ssh          


[AR2]aaa 
[AR2-aaa]local-user hw password cipher 123
[AR2-aaa]local-user hw privilege level 3
[AR2-aaa]local-user hw service-type ssh

[AR2]stelnet server enable 

[AR1]ssh client first-time enable
posted @ 2024-12-05 18:15  清欢渡p  阅读(14)  评论(0)    收藏  举报