Proxy or Vpn Surfing from another place

[firefox]

I have a computer with pfsense 2.3.4-RELEASE-p1 (i386) installed on it
Also installed squid
Is it possible to add to pfsense or to squid a Proxy (I need a proxy or a vpn ?) in order for all traffic that pass through the system (pfsense)
Pass through this proxy / vpn
As if I (Or anyone using the network) were surfing from a different location (another country)

If so
how do I do it

Hope I explained well

If the question is not suitable the forum can be moved to the appropriate forum

[KOM]

Get a VPN account from somewhere.  Configure OpenVPN to connect pfSense to it.  Use policy-based routing to route whatever traffic you want over the VPN link.  No idea how well this would work (if at all) in conjunction with squid.