Failed to retrieve directory listing

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MMarbleSLHA wrote:

I'm not sure why Filezilla is showing the Unix permissions.

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Me either, and it isn't doing that for me.  One small difference is that my system is set up to use FTPS.  You could try that  (setting Filezilla to "use explicit FTP over TLS if available" and enabling FTPS on the NAS). 

My FileZilla trace looks like this:

Status: Connection established, waiting for welcome message...
Status: Initializing TLS...
Status: Verifying certificate...
Status: TLS connection established.
Status: Logged in
Status: Retrieving directory listing...
Status: Server sent passive reply with unroutable address. Using server address instead.
Status: Directory listing of "/" successful
Status: Retrieving directory listing of "/Test"...
Status: Server sent passive reply with unroutable address. Using server address instead.
Status: Directory listing of "/Test" successful

The unroutable address is because I connected over the internet.  Masquerading is disabled on the NAS, but FileZilla figures that out and does the right thing.