OpenVPN provides a link. If running in tun (recommended) mode, it provides a link for IP traffic. If running in tap mode, it provides a link for Ethernet traffic (which includes IP, but also all kinds of other things).
If you run in tap mode, you need to bridge your OpenVPN tap interface to your Ethernet interface. You can do that with
brctl, but, generally, I wouldn't recommend this, unless you need non-IP protocols to work. Its slower (more overhead), and can have serious issues, depending on latency. [OK, you could treat it as a separate network segment and use IP routing, but then you should switch to tun mode.]
When you run in tun mode (which it sounds like you are, and should be), you need to get your IP routing correct. In this case, I'm guessing your client doesn't know that traffic to 10.82.54.11 needs to be routed over the VPN. You need to let the client know this. You could manually set up a static route on the client, or run a routing protocol, or use a built-in feature OpenVPN provides by adding this line to your OpenVPN server config:
push "route 10.82.54.0 255.255.255.0"
push sends an option to the remote side. So the client will add the option
route 10.82.54.0 255.255.255.0 which means to add a static route to route 10.82.54.0/24 through the VPN.
The next thing you need to do is to make sure the routing the other way around is correct, too. Your server 10.82.54.11 (or, more likely, the router or firewall that functions as its default gateway) needs to know that the route to 10.8.0.0/24 is through the VPN gateway. It could be you only have one router/firewall, so the server is behind the firewall that's the VPN server as well, in which case you may just need to add something like this to your OpenVPN config (if you don't already have it):
route 10.8.0.0 255.255.255.0
Which should look familiar, and does the same thing—just on the server end, not the client, due to the lack of
(Adjust all netmasks as appropriate for your network. I assumed /24, but of course you may be using anything.)
[Note: I'm assuming you're using OpenVPNs multi-client mode, not its point-to-point mode. If you're using point-to-point, then the IP addresses in the route commands may be different.]