Synology DS1812+ vs pfSense 2.4.4

** Post will be updated later with some screenshots when I have access to the device again. Sleep mode kicked in! **

Recently I was trying to get access to my Synology DS1812+ NAS as this contains a lot of important data relating to my life. This thing currently still resides within the UK until I am certain that my life in Canada is firm.

However, what’s the best way to connect this device for access abroad? I know, we’ll connect it directly to my pfSense firewall that runs on my rather slow by today’s standard Telus connection (20 down, 1 up!?)

I thought, ah great should be fairly simple right? Synology DSM has an OpenVPN client, pfSense is able to export configurations, and the root CA certificate (um why Synology do we need this?) for Synology to import. Easy! Or not as the case maybe.

Uploading the configuration file without any modification generates an error – “Invalid Parameters”. Through much trial and error I eventually got it to accept a configuration file.

The cause? This line:

ncp-ciphers AES-128-GCM

For some reason, the built in OpenVPN client doesn’t seem to like this. Removing this line solved the error, and I was able to connect successfully from any client on my LAN to the device.

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