FTP服务器：环回地址，比较好用。
使用参考 https://blog.csdn.net/weixin_41623479/article/details/118145532?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522172230612116800227476955%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=172230612116800227476955&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~top_positive~default-1-118145532-null-null.142^v100^pc_search_result_base6&utm_term=filezilla%20server%E4%BD%BF%E7%94%A8%E6%95%99%E7%A8%8B&spm=1018.2226.3001.4449
