I tried using a tunnel to a local Banana Pi running Lubuntu 14.04. The Banana Pi is connected to a DSL router (Vodafone EasyBox 802 with newest firmware 20.02.235) which gets dynamic IP addresses. Currently I have set the correct address manually, but this is only for testing purposes to reduce the number of possible failures.
When I run "traceroute6 -w 2 -q 10 ipv6.google.com" (results see bolow) or ping6 I see quite a high number of packet losses and the connection does not seem to work reliably. If I configure the Banana Pi as exposed host ("DMZ") in the router everything seems to work correctly, but I don't want to use that configuration.
Other settings in my router are only port forwarding for UDP or TCP ports and I could not find any information if it supports protocol 41.
Is there anything else I can do or do I need another tunnel broker which supports AYIA (e.g.) to use a UDP port which should work over NAT?
Her is the output of traceroute:
traceroute to ipv6.l.google.com (2a00:1450:400c:c00::8b) from 2001:470:1f0a:3a7::2, 30 hops max, 16 byte packets
1 * xxxxxx.tunnel.tserv6.fra1.ipv6.he.net (2001:xxxx:yyyy:zzz::1) 15.89 ms * * * 16.72 ms 16.841 ms 16.618 ms 15.581 ms 16.962 ms
2 v399.core1.fra1.he.net (2001:470:0:69::1) 12.192 ms * * * * * * * * *
3 de-cix10.net.google.com (2001:7f8::3b41:0:1) 99.107 ms * 89.301 ms 74.023 ms 73.418 ms * * * * 81.646 ms
4 2001:4860::1:0:4ca2 (2001:4860::1:0:4ca2) 15.582 ms * 64.564 ms 37.789 ms * * 12.58 ms 16.157 ms 15.948 ms 15.403 ms
5 2001:4860::8:0:5038 (2001:4860::8:0:5038) 11.749 ms * 13.647 ms 14.667 ms 22.378 ms 15.71 ms * 52.198 ms 31.08 ms 23.629 ms
6 2001:4860::8:0:8f8e (2001:4860::8:0:8f8e) 15.872 ms * * 16.028 ms 17.06 ms 15.42 ms * 15.348 ms 15.393 ms 16.925 ms
7 2001:4860::8:0:507b (2001:4860::8:0:507b) 26.749 ms * 26.215 ms 26.418 ms 26.438 ms 25.569 ms 26.021 ms 37.17 ms 27.359 ms 1461.04 ms
8 2001:4860::2:0:76e8 (2001:4860::2:0:76e8) 56.733 ms 33.021 ms 26.149 ms 25.701 ms 25.96 ms 26.714 ms 26.25 ms 25.993 ms 26.8 ms 26.259 ms
9 * * * * * * * * * *
10 wg-in-x8b.1e100.net (2a00:1450:400c:c00::8b) 24.32 ms * * * * * * * 24.56 ms 24.416 ms