linux 报错：telnet Connection closed by foreign host

0.美图

1.背景

链接kudu 报错。

# telnet samba.xx.com 7051
Trying 172.xx1.xx.33...
Connected to samba.example.com.
Escape character is '^]'.
Connection closed by foreign host.
           

自动关掉了，这个不是错误，可能是telnet不支持这种协议，是被服务器主动关掉的链接