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On 26/07/2013 10:05, Heikki Hannikainen wrote:
These days some standard protocols exist to set up dynamic multi-point tunnel/VPN networks, such as Cisco's DMVPN (http://en.wikipedia.org/wiki/Dynamic_Multipoint_Virtual_Private_Network
- - apparently also supported by opennhrp on Linux). Might be fun to
play with those. The "interesting" part would be trying to make such a setup co-exist and interconnected with the old amprnet subnets in an effective way (i.e. not traversing via UCSD every time).
Usually the places you cannot get IPIP to work are the same places you won't get GRE (used by DMVPN/OpenNHRP) to work as well. So that brings us back to square 1.
Very basic NAT boxes handle TCP and UDP but rarely more. (Of course there are boxes that do more, I know, but those boxes don't have the issues we are looking to work around :-) ).
Some networks are firewalled and allow access to a few selected ports only (e.g. 53, 80, 443), so we should be looking for a least 1 tunnel protocol that can run over TCP or UDP (or even both) using a configurable port.
73 de Marc, LX1DUC