FileZilla Failed to retrieve directory listing

Being that we offer our servers for free we do not have alot of money for tons of dedicated IPs for each Node, So all of our MC nodes are housed behind a single IP using NAT, which means passive FTP will not work, So if you chose to use an FTP client like FileZilla you will have to configure your system/network per the instructions below. Alternatively you can always use the web based FTP built into the multi-craft interface. Below are the instructions per FileZillas documentation to configure it to use active connections behind NAT.

If you do not want to allow incoming connections on all ports, or if you have a NAT router, you need to tell FileZilla to use a specific range of ports for active mode connections. You will have to open these ports in your firewall. If you have a NAT router, you need to forward these ports to the local machine FileZilla is installed on. Depending on your router model, you can either forward a range of ports or you need to forward all ports individually.
Valid ports can be from 1 to 65535; however, ports less than 1024 are reserved for other protocols. It is best to choose ports greater than or equal to 50000 for active mode FTP. Due to the nature of TCP (the underlying transport protocol), a port cannot be reused immediately after each connection. Therefore, the range of ports should not be too small to prevent the failure of transfers of multiple small files. A range of 50 ports should be sufficient in most cases.

Yours servers are “free” whats the catch?
There is no catch, we host the servers free of charge because we want to, we are not doing it to make a profit, we are nerds who enjoy building an maintaining large networks and we like to offer them to the community because there are alot of people who can setup their own gaming communities and developers making new plugins and other software that otherwise wouldn’t be able to do it. We don’t just do game servers, we also donate a ton of computing power to various distributed computing projects, such as POEM@home and LHC@home. All we as with the free servers is that they are active, we constitute active as having at least 1 login every 2 weeks.

How long does it take to provision a server?
If the server is requested when servers are available it is usually provisioned within 24 hours. If it is requested when servers are unavailable we will send an email when they become available asking if you still want one. and then will be provisioned within 24 hours of receiving email confirming you still want it.