My ISP reseller is offering static IP for cable user in a PPTP VPN based solution, since Native Static IP on the main ISP network need a router configured with some network routing protocol protected by a password to get around their DHCP stuff, and this is not available to reseller..
However, since nothing is never simple, my Astaro box does not support a PPTP VPN used as a VPN client such as most consumer grade VPN router, (it only support the server side of PPTP/L2TP/openvpn as remote access, and Site2Site VPN).
I could always configure the VPN on the host OS side that need the static IP, but I would prefer to avoid that, and it also render my firewall useless to protect from packet coming from inside the VPN.
I wonder if the following would work:
Use a PPTP VPN hardware client (could be a linksys or a linux machine in my hyper-v, or a dedicated linux machine), with 2 NIC, plug eth0 (nic used to establish the PPTP VPN) to my internal network, so it connect to the remote VPN server on the internet, and plug the eth1 to a 3rd NIC (ASTARO:eth2) on my Astaro machine.
My astaro machine would be configured as: ASTARO:eth0 -> Cable modem, ASTARO:eth1 -> internal network, ASTARO:eth2-> tunneled over PPTP VPN
I think (not sure how I can do this), that device needed static IP could be simply routed to that new inteface Astaro:eth2 (possibly by given them that gateway instead of my cablemodem gateway). Also if I'm lucky enough I could also do NATing/Firewall/etc on this "VPN interface" and use other networking feature.
Another option would be to hack astaro and setup the PPTP client on it, but this would not be a supported configuration, and could get wiped by a updated etc..
Let me know if you guys see a reason why this would not work (or work).
Thanks a lot.
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