I need to access an ftps server (vsftpd) on a vendor's site. The vendor has a firewall in front of the ftps server and I have a firewall in front of my ftps client. I understand that ports 990, 991 and maybe 989 need to be opened up for control traffic. When looking at it from the vendor's firewall perspective, should these ports be opened up for both inbound and outbound traffic? What about ports for the DATA channel? Do I have to open all ports above 1000? And should I do it for both inbound and outbound traffic? TIA for your help.