I'm unable to connect to my FTP server externally, If I'm inside the network everything works fine and I'm able to connect to the server and if I don't use any TLS/SSL (Externally) this also works, but as soon as I switch to Implicit I get the following error:
. 2019-12-06 15:04:53.013 Connecting to *IP Address* ...
. 2019-12-06 15:04:53.075 Connected with *IP Address*, negotiating TLS connection...
. 2019-12-06 15:04:53.122 TLS connect: error in SSLv2/v3 read server hello A
. 2019-12-06 15:04:53.122 Can't establish TLS connection
. 2019-12-06 15:04:53.122 Disconnected from server
I have setup a rule on the firewall to forward ports 20, 21, 22, 989, 990 (The control ports were previously open but I've shut those - clutching at straws)
I have tried passive and active modes (Makes no difference) as well as using Explicit TLS/SSL (This just times out)
Any help or ideas would be greatly appreciated!