TrueNAS-13.0-U3.1 - OpenVPN Server - No internet connection when connecting

[Chàra]

Hello, I am trying to host an OpenVPN Server on a machine running TrueNAS-13.0-U3.1.
I tried following along this tutorial, which mostly worked, until I tried accessing anything other than TrueNAS's web UI with its designated port.
My goal is for a client to be able to access other services running on the NAS and to establish SFTP connections with TrueNAS via the VPN.

So yeah, that's my problem. When I try to access anything that is not TrueNAS's web UI, it just doesn't work; not even other things which are on the same IP but on different ports, below are screenshots with everything that might be relevant to my problem.

 

[BazzT]

Hello,

is your Subnet 10.199.0.0/24 -> Subnetmask 255.255.255.0
or is it 10.199.0.0/16 -> Subnetmask 255.255.0.0

VPN Net 10.199.1.0/24

Your Gateway is on 10.199.34.200 if you use /24 i can not be reached.
Change Gateway to 10.199.0.200 if it is located there or change the Route in additional Parameters to 10.199.0.0 255.255.0.0 if it is located in 34.

 

[BazzT]

i was wrong, your net is 10.199.34.0/24

Change the additional Parameters to 10.199.34.0 255.255.255.0 and it shound work