Subj : UFW and he.net
To   : Paul Hayton
From : Michiel van der Vlist
Date : Mon Oct 11 2021 12:37:53

Hello Paul,

On Monday October 11 2021 19:53, you wrote to All:

 PH> I'm also wondering if it's something to do with the tunnel stuff.

Did you get my netmail about protocol 41? This what I wrote:

I just remembered something. When I was using a SixXs tunnel on my windows
machine, I ran into the protocol 41 issue. (Protocol 41, not port 41). If you
do not run the tunnel endpoint on the main router, you have to make sure the
main router passes protocol 41. Either by instructing the firewall in the
router to pass it or to ping6 the tunnel starting point every few seconds or so
to keep protocol 41 open. The ping must originate from the device running the
tunnel endpoint.

Cheers, Michiel

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