FtpConnectionFactory does not properly validate connections

• User impact:

  Medium
• Similar Issues:

  None

The validateObject method relies on an exception to be thrown to determine validity. The noop command can return a negative result without an exception.

public boolean validateObject(Object obj)
    {
        FTPClient client = (FTPClient) obj;
        try
        {
            client.sendNoOp();
            return true;
        }
        catch (IOException e)
        {
            return false;
        }
    }

A possible fix would be to return the result of the noop command instead of returning true.