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My ISP sucks at IPv4, so they are NAT'ting one public IPv4 to multiple customers (they call that DSLite). The problem is: I can't open ports for incoming connections. My public IP can't even be pinged or portscanned.
I still want to access my LAN on the go via IPv4 using OpenVPN. My ISP's support just says it isn't possible. I don't (want to) believe that.
Is there any way I can use OpenVPN to establish a connection between e.g. my mobile phone and my home-server?
EDIT
I already have a OpenVPN Server running on an outside machine that I can connect to from inside the LAN, but bandwidth and speed aren't optimum.
Is it possible to use the outside server as a "router", so that other clients can access the (client) home-server's network? (Sorry, I'm not familiar with packet routing (iptables) and the exact way OpenVPN's internals work.)
Thanks, I resorted to ServerFault because the problem isn't in my LAN, so I thought there is some NAT-breaking-wizardry that can be done. I'll edit my post, perhaps there is some other solution... – NoMad – 2013-12-19T21:01:48.277
Sure there is. I explained that in my answer, that there are software packages that will use other methods to maintain a connection from inside a NAT-ed subnet. You won't easily be doing this with OpenVPN. – mfinni – 2013-12-19T21:30:55.317