1. telnet ip port

telnet 28.104.87.140 8083

2. ssh -v -p port username@ip

-v 调试模式(会打印日志).
-p 指定端口
username:远程主机的登录用户
ip:远程主机

telnet -v -p 8083 root@28.104.87.140

3. curl ip:port

curl http://28.104.87.140:8091