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ProfitBricks Firewall and NATing

Can I use the ProfitBricks's firewall for port forwarding/mapping or NATing?

 
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The firewall option in the DCD can be used for basic protection for that specific network interface card. Once activated, all incoming traffic is blocked, the only traffic allowed is on the ports explicitly added when creating rules. Outgoing traffic is generally permitted. For NAT-ing and port mapping, we recommend that you configure your own firewall VM, a good practice for any size networks.

There are a number of open source options available, such as Iptables, Endian, IPFire, pfSense, Zeroshell etc or other commercial ones like Vyatta, Sophos UTM, MikroTik, SonicWall etc.