Someone replied to my DSL Reports thread: http://www.dslreports.com/forum/r27289866- Apparently there is an ACL issue with their load balancer that is blocking ICMP and causing PMTU issues for people who use tunnels. http://www.dslreports.com/forum/r27226136- <http://www.gossamer-threads.com/lists/nsp/ipv6/34197> It looks like it's been going on since June 11. It's strange that Comcast hasn't resolved the issue by now. Thanks, Derek On 7/1/2012 10:20 PM, Jimmy Hess wrote:
On 7/1/12, Derek Ivey <derek@derekivey.com> wrote:
Anyone else having trouble getting to Comcast's IPv6 Information site? It appears to be unreachable over IPv6. Looks like just ICMP that's broken.
~# telnet comcast6.net 80 Trying 2001:558:fe23:2:69:252:208:135... Connected to comcast6.net (2001:558:fe23:2:69:252:208:135). Escape character is '^]'. HEAD / HTTP/1.1 Host: comcast6.net User-Agent: Telnet
HTTP/1.1 200 OK Date: Mon, 02 Jul 2012 02:21:33 GMT Server: Apache/2.2.15 (Red Hat) X-Powered-By: PHP/5.3.3 Set-Cookie: 1a3c31c9847a772452af472ce0afd5f3=5hcm2m506se424huah4eo5lvo7; path=/ P3P: CP="NOI ADM DEV PSAi COM NAV OUR OTRo STP IND DEM" Cache-Control: no-cache Pragma: no-cache Connection: close Content-Type: text/html; charset=utf-8
Connection closed by foreign host.
~# ping6 comcast6.net PING comcast6.net(speedlab-app05.newcastlerdc.de.panjde.comcast.net) 56 data bytes From te-4-1-ur01.newcastlerdc.de.panjde.comcast.net icmp_seq=0 Destination unreachable: Administratively prohibited From te-4-1-ur01.newcastlerdc.de.panjde.comcast.net icmp_seq=1 Destination unreachable: Administratively prohibited From te-4-1-ur01.newcastlerdc.de.panjde.comcast.net icmp_seq=2 Destination unreachable: Administratively prohibited From te-4-1-ur01.newcastlerdc.de.panjde.comcast.net icmp_seq=3 Destination unreachable: Administratively prohibited From te-4-1-ur01.newcastlerdc.de.panjde.comcast.net icmp_seq=4 Destination unreachable: Administratively prohibited From te-4-1-ur01.newcastlerdc.de.panjde.comcast.net icmp_seq=5 Destination unreachable: Administratively prohibited From te-4-1-ur01.newcastlerdc.de.panjde.comcast.net icmp_seq=6 Destination unreachable: Administratively prohibited From te-4-1-ur01.newcastlerdc.de.panjde.comcast.net icmp_seq=7 Destination unreachable: Administratively prohibited
--- comcast6.net ping statistics --- 8 packets transmitted, 0 received, +8 errors, 100% packet loss, time 6999ms