Subj : Re: UFW and he.net
To   : Paul Hayton
From : Brian Rogers
Date : Tue Oct 12 2021 13:31:00

-=> Paul Hayton wrote to Tommi Koivula <=-

 PH> On 11 Oct 2021 at 08:43p, Tommi Koivula pondered and said...

 TK> His tunnel is working, he can make outbound connections. So the protocal
 TK> 41 is open to the tunnel endpoint computer. (PI).

 PH> I can also ping the Debian box via the Pi endpoint tunnel using IPv6...
 PH> so I figure things must almost be working as I can reach the system
 PH> from the internet via IPv6 and the tunnel using ping

Question:
Is one native IPv6 and the other endpoint a 6-to-4 tunnel? This *may* be an
issue. Using IPv4 as a test would help. I know natively on my access node
I can not ssh to it using it's tunneled IPs because the MTU doesn't match. If
I use a direct IP connection there's no issues at all... and again the MTU
matches at 1500 not 1480 as a tunneled link would. Could this perhaps be
an issue? Just thinking out loud :)

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