USG60 port forwarding (SFTP/FTP) does not work anymore
recently we changed the settings of our FTP server from serving plain FTP to SFTP. Initial test seemed to work, but now the forwarding seems to be stopped by our USG60.
When testing a login directly to the servers IP from the internal network the connection works, but when using the URL and thus coming in by the WAN the FTP-client gives an error that the connection is expired after 20 seconds of inactivity, Error: Cannot connect to server.
I have this settings regarding the NAT:
The Internal IP is set to "SynologyFTP":
When I connect using this IP-address from the lan, the connection works using both ports 21 & 22.
When I check the open ports on our domain or fixed IP address both ports seems open.
Anyone any suggestions or solutions?