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I'm trying to enable IPv6 since my new ISP (CenturyLink) supports. When I do, however, I am unable to connect to half the websites I visit, even if they're well known and well developed. (Yahoo.com goes down with IPv6 enabled, for example.) I can also connect to some dual-stacked, IPv4-only, and IPv6-only sites without issue, so it seems random on which websites work. Internet tests such as http://test-ipv6.com/ return saying everything is good.
Modem Model: ZyXEL C1000Z
IPv4 DHCP Settings:
Public IP: 71.214.94.172
DNS Server #1: 8.8.4.4
DNS Server #2: 8.8.8.8
IPv6 DHCP Settings:
Public IP: 2602:47:d65e:acff::1/64
DNS Address #1: 2001:4860:4860::8888
DNS Address #2: 2001:4860:4860::8844
ifconfig:
david@Galadhriel:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 80:fa:5b:03:f0:a6
inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: 2602:47:d65e:ac00:82fa:5bff:fe03:f0a6/64 Scope:Global
inet6 addr: fd00::d443:bb75:cbbe:b105/64 Scope:Global
inet6 addr: 2602:47:d65e:ac00:d443:bb75:cbbe:b105/64 Scope:Global
inet6 addr: fd00::82fa:5bff:fe03:f0a6/64 Scope:Global
inet6 addr: fe80::82fa:5bff:fe03:f0a6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:53121 errors:0 dropped:0 overruns:0 frame:0
TX packets:495685 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:62033716 (62.0 MB) TX bytes:38657577 (38.6 MB)
Interrupt:20 Memory:f7e00000-f7e20000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:538876 errors:0 dropped:0 overruns:0 frame:0
TX packets:538876 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:32106042 (32.1 MB) TX bytes:32106042 (32.1 MB)
wlan0 Link encap:Ethernet HWaddr a0:a8:cd:67:88:38
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:806 errors:0 dropped:0 overruns:0 frame:0
TX packets:601 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:320472 (320.4 KB) TX bytes:84286 (84.2 KB)
What am I missing here?
Pick one that fails, and check whether you're getting a v4 or v6 address from DNS. Try a traceroute to the IP and see where you stop. – Ron Trunk – 2014-08-08T18:54:46.577
The traceroutes and pings are working perfectly. The website http://whatismyv6.com/ shows that I'm connecting using an IPv4 address. Their IPv6-only site doesn't work in the web browser, but can still be pinged.
– vroomhenderson – 2014-08-08T20:29:51.943Check your Zyxel router. It's already doing one bad thing I can see, that is, assigning a stupid unique local address prefix (this should be set randomly, but yours is fixed as
fd00::/48
). Try resetting it to factory, or updating its firmware. – Michael Hampton – 2014-11-16T07:59:42.367