FreeFileSync Forum

I'll try and explain in greater detail the workaround.
First, you need to know the local IP address of your FTP server, e.g. 192.168.1.2
Go to your router page, e.g. http://192.168.1.1, and set up port forward for TCP, external port 990, to local IP 192.168.1.2 local port 21. You can also use a ...

Suggested workaround: forward public port port 990 to internal port 21. It's the only way I could get FFS to work.



Hi simo,

I would appreciate it if you share how exactly you did the workaround on your computer, because I'm still struggling with this problem. Was it through Command prompt ...

Hi simo,

Thanks for the workaround suggestion. Won't that be problematic for other programs in my computer which rely on implicit FTPS through port 990? jjosemar, 13 Apr 2021, 17:57

You can also define a custom port, if you're already using port 990 for its intended use.

Recently implicit FTP through port 990 has regained popularity, at least in my area, as ISPs started to block port 21 by default.
They say it can be used for unencrypted communication (i.e. plain-text FTP), and therefore they're blocking it for everyone in order to mitigate the security risk ...

I'm having this problem too. Port 990 apparently needs "implicit" and not "explicit".

They are not excluded with filters, I have not set a minimum size limit, I have not set a date filter.
I am using the default "mirror ->" config.

Empty folders are left behind when folders are deleted on the source side.


You can check the main dialog to get a preview of what will happen to ...

They are not excluded with filters, I have not set a minimum size limit, I have not set a date filter.
I am using the default "mirror ->" config.

Empty folders are left behind when folders are deleted on the source side.

FFS will delete folders if they exist only on one side, and the sync direction is set accordingly. Zenju, 27 Jun 2019, 08:22

What is the correct way to obtain this behavior?
I'm noticing a lot of empty folders that exist even though I've deleted them on the "source" side.