My setup is dual-stack with IPv6 preferred on the Windows clients. My tunnel terminates on the Paris server.
I noticed delays to some websites recently and it appears that I don't have connectivity to some networks.
For example one of the traceroute asterisk's out for most of the path:
Tracing route to www.quidco.com [2600:9000:218c:e600:12:7bd4:5080:93a1]
over a maximum of 30 hops:
1 5 ms 9 ms <1 ms 2001:470:xxxx::xx
2 6 ms 1 ms 1 ms 2001:470:xxxx::xx
3 17 ms 17 ms 16 ms 2001:470:xxxx::xx
4 15 ms 14 ms 14 ms 10ge7-3.core1.par2.he.net [2001:470:0:7b::1]
5 15 ms 14 ms 14 ms globeinternet-as6453.10gigabitethernet11-2.core1.par2.he.net [2001:470:0:2c4::2]
6 * 15 ms * if-be-39-2.ecore1.pvu-paris.ipv6.as6453.net [2a01:3e0:ff80::5]
7 15 ms 15 ms 20 ms 2a01:3e0:ff80:100::4e
8 * * * Request timed out.
9 * * * Request timed out.
10 * * * Request timed out.
11 * * * Request timed out.
12 16 ms 15 ms 15 ms 2620:107:4000:cfff::f202:fac3
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.
Trace complete.
Traceroute to google works OK.
Z:\>tracert www.google.co.uk
Tracing route to www.google.co.uk [2a00:1450:4007:813::2003]
over a maximum of 30 hops:
1 1 ms 5 ms 1 ms 2001:470:xxxx::xx
2 1 ms 1 ms 1 ms 2001:470:xxxx::xx
3 18 ms 16 ms 17 ms 2001:470:xxxx::xx
4 15 ms 15 ms 14 ms 10ge7-3.core1.par2.he.net [2001:470:0:7b::1]
5 15 ms 15 ms 16 ms google.equinix-ix.fr [2001:7f8:43::1:5169:1]
6 16 ms 17 ms 15 ms 2001:4860:0:1016::1
7 17 ms 15 ms 15 ms 2001:4860:0:1::51f9
8 15 ms 15 ms 15 ms par21s06-in-x03.1e100.net [2a00:1450:4007:813::2003]
Trace complete.
Is there a routing issue in the HE network?
That's not a problem with the routing. traceroute like tools usually send UDP packets to DNS port and if it is filitered - there won't be any response. With regular traceroute on Linux I see the same issue (and I am NOT on HE.NET). With traceroute using ICMPv6 probes it finishes on 14th hop.
I am not sure if Windows tracert can send ICMPv6 probes. If yes - give it a try. If not - look for better tool.