Failed to Establish Data Socket
This error usually occurs when trying to connect in PASV mode to a Site that only accepts PORT mode connections. Change the connection type from PASV mode to PORT mode to connect to the Site.
To switch from PASV to PORT mode
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In the Site Manager, click the problem Site.
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On the main menu, click File > Properties.
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Click the Type tab.
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In the Data connection type list, select the Use PORTcheck box.
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Click OK.