Proxy servers are similar to a VPN, but they don’t encrypt your connection. They only mask your IP with the other IP to bypass geo-restrictions.
So thinking from a broad perspective, we highly recommend you to go for a VPN like IPVanish. Or if you are looking for a temporary solution, you can use proxy servers. Before adding a proxy server on PS4, make sure to find a good proxy.
Once you connect to a proxy make a note of the IP address and port number through which connection is made. Now you can easily add proxy server on PS4 with a few simple steps.