Can 'IPv4 Tunnel Network' be on same subnet?

[AxSD]

I have set up a OpenVPN server on pfsense. It works great when "IPv4 Tunnel Network" is set to be outside of our current subnet mask 255.255.240.0 (/20). When this tunnel network IP is set to something within the subnet, a VPN connection can be established, but I can't ping any machines, or have any kind of internet access.

I'd like this Tunnel Network IP settings to be inside our subnet if possible.

I also have "Provide a DNS server list to clients" and "Force all client generated traffic through the tunnel" check marked

[Derelict]

No.

[viragomann]

You're looking for a VPN-bridge:
http://sclabs.blogspot.co.at/2012/05/openvpn-bridge-with-pfsense-201.html

That's not well supported and it's not recommended:
https://doc.pfsense.org/index.php/OpenVPN_Remote_Access_Server#OpenVPN_Client_Bridging

Some guys here who tried that got no luck with it. It's better to do routing with a different tunnel subnet.