@Kevin_Z 

The OpenVPN server is setup on the TP-Link C3150 V2 router. The DDNS is setup on the router with TP-Link as the provider. VPN settings are all correct. VPN server is active and can confirm that a VPN connection is enabled. With regards to network topology, the internet connection comes in via coax into a cable modem and that goes out to the TP-Link C3150 V2 router. I have about 10 clients connected via wired and wireless. After enabling remote connections to the VPN server via Apple iPhone and Mac clients, there is no access to the server LAN. I've attached a screenshot of the server setup which was the default setup with the exception of the client access option, which I changed to Internet and Home Network. I reset my router twice and went through the same steps with no success when it came to being able to access the server side LAN. 

@Kevin_Z 

I'm trying to access local drives on the server side LAN from the client. There's no firewall on the iPhone client app and I tried disabling the one on the TP-Link router without success. 

@Kevin_Z 

They are all enabled on the server. Is it recommended to disable them for the OpenVPN to work?

@Kevin_Z 

I disabled the firewall and antivirus before connecting through the client but still no access to LAN devices. I've attached some screenshots to show the disactivation of those settings plus the OpenVPN client showing as connected. I was previously unable to access the router remotely (192.168..0.1) but it now works after enabling remote management. I still cannot access local drives though. 

@blueatlantic 

You don't need to disable the firewall of your Archer C3150 router! I think this is not what Kevin_Z meant when he asked you to disable the firewall of your "server".

What exactly are these local drives that you are trying to access? Disks that are connected to the C3150 via USB or NAS devices connected to the LAN or shared drives/folders of Windows or Mac computers connected to the LAN?

@woozle 

Ok, I thought they were referring to the OpenVPN server which is on the router. The local drives that I'm trying to access are USB drives connected to a Mac. That Mac is connected via ethernet to the TP-Link C3150 and the firewall of that Mac is disabled. When I'm at the same location as that Mac and the USB drives, they're shared on the LAN and can be accessed from other devices on the same network. I'm trying to have that same access but remotely via OpenVPN.