Re: [44net] beware of IPIP scanner...

It it certainly true that many home users are now behind firewalls and “NAT” devices that cause issues with many tunneling protocols such as IPIP. It’s worthwhile to mention that for a majority of these people it is possible to fix this issue with a third party device such as Ubiquiti’s Edgerouter X. I have seen a number of threads about this so it is clear that a majority of the participants in this mailing list are aware of this solution. The issue is with those who utilize an ISP that uses “Carrier Grade NAT” (often just “CGNAT”). In this situation, the user will often have no control over the firewall or “NAT” appliance and therefore no way to allow IPIP (or otherwise) traffic to travel to their 44net router. I am surprised that these have not been a significant number of threads about this issue before especially as there appears to be no good solution (not to say that there are not any solutions). Bryce Wilson, AS202313 Note about NAT and NAT related terms being in quotation marks: I have been informed several times that the version of NAT found on most consumer hardware is in fact not NAT (Network Address Translation) but Stateful PAT (Port Address Translation). I use NAT above because that is the term that the majority of people would be familiar with. I aim not to use terms that are technically correct but not understood by the reader.