Are there any services that route all computer net traffic through a proxy?

I am looking for an Internet service that would route all my net traffic through a proxy, so that it would appear to originate from another country. I know that there are many services that do this for web browsing, but I am looking for a proxy for all types of traffic. Are there any such services?

Use a personal VPN, http://www.personalvpn.org since it works at the network level and sends all traffic through the tunnel by default.

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