Rails Net::SFTP 连接超时

Question

我正在尝试从 Net：：SFTP (https://github.com/net-ssh/net-sftp( 的文档中提取命令，这是我的代码：

Net::SFTP.start(*sftp_credentials) { |sftp| 
sftp.dir.foreach("/") { |entry| 
puts entry.longname
}
}

这是我得到的回应：

Net::SSH::ConnectionTimeout: Net::SSH::ConnectionTimeout
from /Users/regan/.rvm/gems/ruby-2.3.3@scotpac/gems/net-ssh-5.0.2/lib/net/ssh/transport/session.rb:92:in `rescue in initialize'
from /Users/regan/.rvm/gems/ruby-2.3.3@scotpac/gems/net-ssh-5.0.2/lib/net/ssh/transport/session.rb:60:in `initialize'
from /Users/regan/.rvm/gems/ruby-2.3.3@scotpac/gems/net-ssh-5.0.2/lib/net/ssh.rb:242:in `new'
from /Users/regan/.rvm/gems/ruby-2.3.3@scotpac/gems/net-ssh-5.0.2/lib/net/ssh.rb:242:in `start'
from /Users/regan/.rvm/gems/ruby-2.3.3@scotpac/gems/net-sftp-2.1.2/lib/net/sftp.rb:31:in `start'

关于出了什么问题的任何想法？

Answer 1

事实证明，我尝试连接的服务器具有防火墙，我没有被列入白名单。