Alright here's the thing. I've been using the IPv6 tunnel for everything and recently I've been unable to reach some sites.
I tried it on two separate computers both using the tunnel service and neither work. Here's the tracert for non-working:
C:\WINDOWS\system32>tracert6 svn.wikimedia.org
Tracing route to mayflower.esams.wikimedia.org [2620:0:862:1:209:3dff:fe10:d5d2]
from 2001:470:1f0e:6::2 over a maximum of 30 hops:
1 29 ms 30 ms 29 ms overlordq.tunnel.tserv8.dal1.ipv6.he.net [2001:470:1f0e:6::1]
2 28 ms 31 ms 32 ms gige-g2-14.core1.dal1.he.net [2001:470:0:78::1]
3 65 ms 72 ms 66 ms 10gigabitethernet5-2.core1.ash1.he.net [2001:470:0:3b::2]
4 80 ms 70 ms 71 ms 10gigabitethernet1-2.core1.nyc4.he.net [2001:470:0:36::2]
5 148 ms 144 ms 143 ms 10gigabitethernet1-2.core1.lon1.he.net [2001:470:0:3e::2]
6 151 ms 150 ms 152 ms 2001:7f8:4::3f89:1
7 157 ms 149 ms 149 ms te0-7-0-7.crs.tc2.leaseweb.net [2001:1af8::2]
8 149 ms 148 ms 147 ms amx-tc2-evo-sr1.leaseweb.net [2001:1af8:1:795:2d0:2ff:fe33:3c00]
9 162 ms 152 ms 149 ms te-8-4.csw1-knams.wikimedia.org [2620:0:862:fe01::1]
10 152 ms 149 ms 148 ms mayflower.esams.wikimedia.org [2620:0:862:1:209:3dff:fe10:d5d2]
For the hellifit i disabled the tunnel and tried 6to4 which surprisingly went through HE as well.
C:\Documents and Settings\Brent>tracert6 svn.wikimedia.org
Tracing route to mayflower.esams.wikimedia.org [2620:0:862:1:209:3dff:fe10:d5d2]
from 2002:46b2:1f14::46b2:1f14 over a maximum of 30 hops:
1 67 ms 66 ms 65 ms 2002:c058:6301::
2 63 ms 67 ms 64 ms v104.core1.ash1.he.net [2001:470:0:40::2]
3 64 ms 64 ms 62 ms 10gigabitethernet1-2.core1.nyc4.he.net [2001:470:0:36::2]
4 143 ms 144 ms 144 ms 10gigabitethernet1-2.core1.lon1.he.net [2001:470:0:3e::2]
5 157 ms 164 ms 156 ms 2001:7f8:4::3f89:1
6 157 ms 157 ms 156 ms po100.sr1.evo.leaseweb.net [2001:1af8::a]
7 178 ms 178 ms 179 ms te-8-4.csw1-knams.wikimedia.org [2620:0:862:fe01::1]
8 177 ms 177 ms 176 ms mayflower.esams.wikimedia.org [2620:0:862:1:209:3dff:fe10:d5d2]
Trace complete.
.
Oddly enough, the sites now load. Is this on HE's end, or is it on WMF's end?