To be more specific, IPIP is a low level protocol that rides on IPv4 or IPv6 - for example:
http://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml
protocol number 4 - IPIP protocol number 6 - TCP protocol number 17 - UDP
Not all home routers will allow for forwarding of this traffic but some routers support a "DMZ" feature where all unknown traffic will be sent. This port then might have the protocol 4 traffic you're looking for.
--David KI6ZHD
On 03/20/2016 11:14 AM, Marius Petrescu wrote:
(Please trim inclusions from previous messages) _______________________________________________ You need only IP protocol 4 (encap).