frp配合FileZilla Server搭建FTP映射

经实践，可行的一篇文章分享：

https://blog.csdn.net/shile/article/details/74392125

主要点子：

1、Passive mode settings的use custom port range 设置为50000到50002

2、frpc配置

[ftp21]
type = tcp
local_ip = 127.0.0.1
local_port = 21
remote_port = 2121


[ftp1]
type = tcp
local_ip = 127.0.0.1
local_port = 50000
remote_port = 50000


[ftp2]
type = tcp
local_ip = 127.0.0.1
local_port = 50001
remote_port = 50001


[ftp3]
type = tcp
local_ip = 127.0.0.1
local_port = 50002
remote_port = 50002

注意这里一定有四个，不然列表会报425的错误。