思科设备，远程登录23端口被占用的解决方法

场景:早上网速慢，想用远程的方式登录思科的路由器发现一直登录不了。后面查看原来是23端口被别人占用了。

具体解决方法如下：

1.查看具体用户

arp-wuke#show user 

    Line User Host(s) Idle Location

* 0 con 0 idle 00:00:00

 67  tty   1                       59.173.13.146

2.发现无法clear line vty [NO] 删除

 进阶方法如下:

arp-wuke#show tcp brief  ###找出你要剔出的用户

TCB Local Address Foreign Address (state)

8188EAA4 210.77.83.28.23 116.25.56.207.5218 CLOSED

82275EFC 210.77.83.28.23 14.33.31.14.41864 CLOSEWAIT

81D4F548 210.77.83.28.23 222.186.34.56.56970 CLOSED

815F2DC4 210.77.83.28.23 113.52.192.75.46597 CLOSEWAIT

81D257FC 210.77.83.28.23 116.25.56.207.57603 CLOSEWAIT

81D8453C 210.77.83.28.23 59.173.13.146.2213 ESTAB

815F275C 210.77.83.28.23 117.212.161.83.51667 CLOSEWAIT

81593DD8 210.77.83.28.23 222.186.34.56.40471 CLOSED

81D5205C 210.77.83.28.23 198.13.104.180.50500 CLOSED

815DBC48 210.77.83.28.23 213.248.183.132.44804 CLOSEWAIT

81D20934 210.77.83.28.23 82.185.78.130.56260 CLOSEWAIT

815B0C1C 210.77.83.28.23 113.52.192.75.53265 CLOSEWAIT

81D87254 210.77.83.28.23 108.203.94.175.41735 CLOSEWAIT

81D20DD8 210.77.83.28.23 222.186.34.56.64060 CLOSED

81DC12A8 210.77.83.28.23 85.105.88.72.46511 CLOSEWAIT

815A5F88 210.77.83.28.23 201.235.16.171.4116 CLOSEWAIT

81D83E78 210.77.83.28.23 187.85.158.34.51989 CLOSEWAIT

81D59E60 210.77.83.28.23 212.253.91.29.36590 CLOSEWAIT

81625764 210.77.83.28.23 187.85.158.34.47292 CLOSEWAIT

81C85DF4 210.77.83.28.23 91.155.48.43.32988 CLOSEWAIT

arp-wuke#clear tcp tcb 81D8453C

[confirm]

 [OK]

arp-wuke#show user

    Line User Host(s) Idle Location

* 0 con 0 idle 00:00:00

  Interface User Mode Idle Peer Address