Xceed .FTP timeout GetFolderContents

Xceed .FTP timeout GetFolderContents

I get a timeoutexception when I do GetFolderContents
however when filezilla connects to the site it’s succeeding but it is using a workaround

Binding data connection source IP to control connection source IP 172.30.30.55

14:14:09 Command: PASV
14:14:09 Response: 227 Entering Passive Mode (192,168,11,250,192,17).
14:14:09 Status: Server sent passive reply with unroutable address. Using server address instead.
14:14:09 Trace: Reply: 192.168.11.250, peer: 213.119.36.234
14:14:09 Trace: Binding data connection source IP to control connection source IP 172.30.30.55

14:14:09 Command: LIST
14:14:09 Response: 125 Data connection already open; transfer starting.