查看确认方法
[root@nodchen ~]# nmap -p4786 172.30.4.2 Starting Nmap 5.51 ( http://nmap.org ) at 2017-05-20 15:13 CST
Nmap scan report for 172.30.4.2
Host is up (0.0023s latency).
PORT STATE SERVICE
4786/tcp open unknown
临时处置措施：(关闭协议)
switch#conf t
switch(config)#no vstack
switch(config)#do wr
switch(config)#exit
检查端口已经关掉：
switch>show tcp brief all
TCB Local Address Foreign Address (state)
0350A018 *.443 *.* LISTEN
03293634 *.443 *.* LISTEN
03292D9C *.80 *.* LISTEN
03292504*.80 *.* LISTEN