利用服务器公网ip
利用服务端7000端口映射内网81端口
服务端配置：
[common]
bind_port = 10081
dashboard_port = 7500
token = 10470c3b4b1fed12c3baac014be15fac67c6e815
dashboard_user = user
dashboard_pwd = user
vhost_http_port = 7000
vhost_https_port = 10443
客户端配置：
[common]
server_addr = xx.xx.xx.xx
server_port = 10081
token = 10470c3b4b1fed12c3baac014be15fac67c6e815
[web]
type = http
local_port = 81
custom_domains = xx.xx.xx.xx
如果要映射2个端口，就配置2个frp分别设置配置文件，暂未找到更好的方法
例如，映射7001端口为80端口
服务端：
[common]
bind_port = 10080
dashboard_port = 7600
token = 10470c3b4b1fed12c3baac014be15fac67c6e816
dashboard_user = user
dashboard_pwd = user
vhost_http_port = 7001
客户端：
[common]
server_addr = xx.xx.xx.xx
server_port = 10080
token = 10470c3b4b1fed12c3baac014be15fac67c6e816
[web]
type = http
local_port = 80
custom_domains = xx.xx.xx.xx