I have a curious problem. I can't seem to get FTP over SSL/TLS to work properly. It works fine over the LAN. It also works fine over the Internet, but only if I make my Synology the default host on my Airport Extreme (ie. the recipient of all Internet port-requests). If I portforward specific ports the problems begin. I've tried forwarding the following FTP-related ports the synology at the same time: 20, 21, 989, 990, 55536-55663.
I have no problems connecting with SSL/TLS turned off.
I've tried with and without "Report external IP in PASV mode" and haven't changed the default passive range. I've also tried the old trick of turning off SSL/TLS, restarting the Synology and turning it back on. No dice.
This is the closest I seem to come to connecting using FileZilla (also tried CuteFTP Pro without succes):
- Code: Select all
Status: Resolving address of xxxxxxx.xxx
Status: Connecting to yyy.yyy.yyy.yyy:21...
Status: Connection established, waiting for welcome message...
Response: 220 Synology FTP server ready.
Command: AUTH TLS
Response: 234 AUTH SSL command successful.
Status: Initializing TLS...
Status: Server did not properly shut down TLS connection
Error: Could not connect to server
I don't know what this means: "Server did not properly shut down TLS connection"
I'm running newest firmware on everything.
It seems to me I need to forward some secret additional port to make things work - just don't know which. Anyone have any ideas?