NAS shared folder, access using FTP through PlusNet Hub Two Firewall

[#1]

Hi Champnet

On the NAS I'm using Synology's own, via Control Panel > File Services > FTP enabled

I have a DDNS set up via Control Panel > External User to point at my IP.

On a second computer I test access using FileZilla. It's on the same network so I disconnect it first and then connect through a tethered mobile phone on 4G.

The external user I have set up for access only has an active FTP or FTPS option.

Neither the external user, nor I, can connect.

Jon

[#2]

Looks like Synology will only use passive mode.

In Filezilla , Site Manager, select your connection,

General Tab: protocol = FTP.

Advanced Tab: server type = Unix

Transfer Settings Tab: transfer mode = passive.

[#3]

@J0N 

You can check if the ports are open using this tool

https://www.yougetsignal.com/tools/open-ports/ 

You have setup port forwards rules on the Hub Two?

[#4]

@J0N  There’s a good guide here :

https://support.aceperipherals.com/kb/faq.php?id=230 

the only open ports on your router should be 20 & 21 which should be forwarded  to your Synology box.

[#5]

Hi Champnet

Thank you for your help.

The only option I have is Active Mode, so it looks like the Hub 2 is set up correctly now, but the block is the Synology NAS. I'll get in contact with Synology to see if they can support Active mode.

Jon

[#6]

@J0N  Are you seeing any error messages or is it just not working ?

[#7]

The external user says they can only connect passively. I've asked them for the active mode error message and will get back to you.

[#8]

@J0N You definitely changed the transfer settings in Filezilla to passive ?

To eliminate any problems caused by DDNS try changing host IP in Filezilla to your actual external IP address.

If not known look here : https://www.whatsmyip.org/ 

[#9]

@Champnet 

Passive connection isn't an option for me. The external user doesn't use it and Filezilla was for my own checks only.

I reset the Hub 2, removed forwarding (active/passive) then reset ports 20-21 and it's working now.

Thank you for your assistance.