It is possible.
Here is my configuration:
lan -- A -- lan -- B -- wan -- C -- lan
I run a cipe tunnel between A and C, both linux boxes. B is a DSL PPoA router
that does NAT but doesn't block anything I need. C interfaces to the WAN via
cable modem. In A's options files the "me" parameter is the address used in
communications locally with B, i.e., a private address. The matching "peer"
parameter in C's option file uses B's IP address, not A's (but the packet go
to A because B does NAT).
At 02:23 PM 11/1/2001 +0100, Robert Vojta wrote:
> I read almost whole cipe info page and I found, that there is a possibility
>to establish CIPE connection between two machines, when one have static
>IP address and second machine have dynamic based address from DHCP and from
>subnet 10.0.0.0. Between these two machines is masq router with no ports
>blocking, but I haven't any access to this router (and I will never have) for
>some port forwarding, etc.
> I spent whole day of reading archive, searching web site with google, ...
>but I'm not sure if this is possible. Everyone who have NATed network is
>speaking about port forwarding but I can't do this.
> Please, is this possible and if yes, can I find more examples than cipe
>info have? Or is there anyone who have working this configuration?
> Never test for an error condition you don't know how to handle.