Comcast's IPv6 Information Site Unreachable

Mon Jul 2 02:45:51 UTC 2012

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 at 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