Dear Sir,

My name is Keng Soon Goh, and I am working for Hughes Network Systems. We are Service Provider for satellite company, and one of our client was having problem accessing to your websites through IPv6 address. When I run DNS lookup, I noticed three IPv6 addresses as below.

nslookup -q=aaaa www.fedoraproject.org
Server: 172.27.0.9
Address: 172.27.0.9#53

Non-authoritative answer:
www.fedoraproject.org canonical name = wildcard.fedoraproject.org.
wildcard.fedoraproject.org has AAAA address 2001:4178:2:1269::fed2
wildcard.fedoraproject.org has AAAA address 2607:f188::dead:beef:cafe:fed1
wildcard.fedoraproject.org has AAAA address 2610:28:3090:3001:dead:beef:cafe:fed4

Authoritative answers can be found from:
fedoraproject.org nameserver = ns02.fedoraproject.org.
fedoraproject.org nameserver = ns04.fedoraproject.org.
fedoraproject.org nameserver = ns05.fedoraproject.org.
fedoraproject.org nameserver = ns-sb01.fedoraproject.org.

We noticed that one of your IPv6 address 2001:4178:2:1269::fed2 cannot browse either http or https, but the other two are working fine. Can you take a look on this ipv6 address? In addition, the traceroute seems to stop at Level3 cloud, and I think it is the problem with this address.

Router#traceroute
Protocol [ip]: ipv6
Target IPv6 address: 2607:f188::dead:beef:cafe:fed1
Source address: 2001:5B0:210B:1:1:1:1:1
Insert source routing header? [no]: 
Numeric display? [no]: 
Timeout in seconds [3]: 
Probe count [3]: 
Minimum Time to Live [1]: 
Maximum Time to Live [30]: 
Priority [0]: 
Port Number [0]: 
Type escape sequence to abort.
Tracing the route to 2607:F188::DEAD:BEEF:CAFE:FED1

  1 2001:5B0:21FF:FFFA::100 1 msec 1 msec 1 msec
  2 2001:1900:2100::D9D 1 msec 1 msec 1 msec
  3 2001:1900:4:1::279 13 msec 14 msec 14 msec
  4 2001:1900:4:1::61 21 msec 27 msec 21 msec
  5 2001:1900:1A:7::7 22 msec 23 msec
    2001:1900:1A:5::7 23 msec
  6 2001:470:0:203::1 25 msec 23 msec 25 msec
  7 2001:470:0:16A::2 39 msec 35 msec 39 msec
  8 2001:504:13::40A 31 msec 31 msec 30 msec
  9 2607:F130::3 36 msec 30 msec 30 msec
 10 2607:F130:0:B::2 30 msec 30 msec 30 msec
 11 2607:F188::DEAD:BEEF:CAFE:FED1 !A  !A  !A 
Router#traceroute                    
Protocol [ip]: ipv6
Target IPv6 address: 2001:4178:2:1269::fed2
Source address: 2001:5B0:210B:1:1:1:1:1
Insert source routing header? [no]: 
Numeric display? [no]: 
Timeout in seconds [3]: 
Probe count [3]: 
Minimum Time to Live [1]: 
Maximum Time to Live [30]: 
Priority [0]: 
Port Number [0]: 
Type escape sequence to abort.
Tracing the route to 2001:4178:2:1269::FED2

  1 2001:5B0:21FF:FFFA::100 1 msec 1 msec 1 msec
  2 2001:1900:2100::D9D 1 msec 0 msec 0 msec
  3 2001:1900:4:1::13E 1 msec 1 msec 1 msec
  4 2001:1900:4:1::142 12 msec 12 msec 12 msec
  5 2001:1900:4:1::32 13 msec
    2001:1900:4:1::2E 12 msec 12 msec
  6 2001:1900:4:1::36 36 msec 36 msec 35 msec
  7 2001:1900:4:1::1D 37 msec 107 msec 37 msec
  8 2001:1900:4:1::22 57 msec 60 msec 57 msec
  9 2001:1900:4:1::F1 70 msec 57 msec 58 msec
 10 2001:1900:4:1::105 63 msec 64 msec 63 msec
 11 2001:1900:4:1::D5 82 msec
    2001:1900:4:1::DD 62 msec
    2001:1900:4:1::D5 63 msec
 12 2001:1900:6:1::15 141 msec 140 msec 142 msec
 13 2001:1900:5:1::12A 143 msec
    2001:1900:5:1::12E 141 msec 140 msec
 14 2001:1900:5:1::215 152 msec 150 msec 150 msec
 15 2001:1900:5:1::25E 156 msec 157 msec 156 msec
 16  *  *  * 
 17  *  *  * 
 18  *  *  * 
 19  *  *  * 
 20  *  *  * 
 21  *  *  * 
 22  *  *  * 
 23  *  *  * 
 24  *  *  * 
 25  *  *  * 
 26  *  *  * 
 27  *  *  * 
 28  *  *  * 
 29  *  *  * 
 30  *  *  * 
Destination not found inside max hopcount diameter.
Router#traceroute             
Protocol [ip]: ipv6
Target IPv6 address: 2610:28:3090:3001:dead:beef:cafe:fed4
Source address: 2001:5B0:210B:1:1:1:1:1              
Insert source routing header? [no]: 
Numeric display? [no]: 
Timeout in seconds [3]: 
Probe count [3]: 
Minimum Time to Live [1]: 
Maximum Time to Live [30]: 
Priority [0]: 
Port Number [0]: 
Type escape sequence to abort.
Tracing the route to 2610:28:3090:3001:DEAD:BEEF:CAFE:FED4

  1 2001:5B0:21FF:FFFA::100 1 msec 2 msec 1 msec
  2 2001:1900:2100::D9D 2 msec 1 msec 1 msec
  3 2001:1900:4:1::279 14 msec 14 msec 14 msec
  4 2001:1900:12:2::D 14 msec 14 msec
    2001:1900:12:1::D 14 msec
  5 2001:1900:4:3::276 14 msec 14 msec 14 msec
  6 2001:504:D::BD 76 msec 30 msec 31 msec
  7  *  *  * 
  8  *  *  * 
  9  *  *  * 
 10 2001:468:1:60::1 188 msec 83 msec 83 msec
 11 2610:28:3090:23::2 89 msec 87 msec 89 msec
 12 2610:28:3090:3001:DEAD:BEEF:CAFE:FED4 !A  !A  !A 

Thanks.
Keng Soon