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→IPv6 DEBUG
== IPv6 DEBUG ==
== IPv6 DEBUG ==
Debug suggestions related to IPv6 configuration issues that might be encountered when accessing my [http://ipv6.chappell-family.com/ipv6tcptest/ IPv6 firewall tester.]
Debug suggestions related to IPv6 configuration issues that might be encountered when accessing the [https://ipv6.chappell-family.com/ipv6tcptest/ IPscan IPv6 firewall tester.]
For general IPv6 debug please see:
For general IPv6 debug please see:
=== General IPv6 Connectivity ===
=== General IPv6 Connectivity ===
First check your general IPv6 connectivity. At a command prompt or terminal check that your machine has a global unicast IPv6 address allocated (i.e. 2000::/3, so begins either 2XXX or 3XXX) as shown in these examples:
First check your general IPv6 connectivity. At a command prompt or terminal check that your machine has a global unicast IPv6 address allocated (i.e. 2000::/3, so begins either 2XXX or 3XXX) as shown in these examples:
Based on the fact that must have already accessed my server using IPv4, in order to be reading this, then the following IPv4 A-record lookup should work:
Based on the fact that must have already accessed the IPscan domain using IPv4, in order to be reading this, then the following IPv4 A-record lookup should work:
Non-authoritative answer:
Non-authoritative answer:
Name: ipv6.chappell-family.com
Name: ipv6.chappell-family.com
Address: 212.159.122.74
Address: B.C.D.E
=== DNS Resolver Issues ===
=== DNS Resolver Issues ===
Some DNS services don't seem to reliably resolve AAAA lookups. In particular, some appear to resolve A and AAAA records with different delays, and/or reliability, which sometimes causes web browsers to determine that only an IPv4 address exists since the IPv6 lookup resolves too slowly/unreliably. You can try one of the publicly accessible DNS resolvers as an alternative to your current providers' if you believe that this might be the case. For those using a tunneled IPv6 connection then it is likely that your tunnel provider also offers a DNS resolver:
Some DNS services don't seem to reliably resolve AAAA lookups. In particular, some appear to resolve A and AAAA records with different delays, and/or reliability, which sometimes causes web-browsers to determine that only an IPv4 address exists since the IPv6 lookup resolves too slowly/unreliably. You can try one of the publicly accessible DNS resolvers as an alternative to your current providers' if you believe that this might be the case. For those using a tunneled IPv6 connection then it is likely that your tunnel provider also offers a DNS resolver:
* Hurricane Electric - see Available DNS resolvers section of your tunnel setup (may be 2001:470:20::2 and 74.82.42.42)
* Hurricane Electric - see Available DNS resolvers section of your tunnel setup (may be 2001:470:20::2 and 74.82.42.42)
* [https://developers.google.com/speed/public-dns/docs/using Google DNS Servers]
* [https://developers.google.com/speed/public-dns/docs/using Google DNS Servers]
* [http://www.opendns.com/technology/ipv6/ OpenDNS IPv6 trial]
* [https://support.opendns.com/hc/en-us/articles/227986667-Does-OpenDNS-Support-IPv6- OpenDNS IPv6]
* [http://ipv6.google.com Google's IPv6-only-URL]
* [http://ipv6.google.com Google's IPv6-only-URL]
* [http://pi.ipv6.chappell-family.co.uk/ An IPv6-only-URL]
* [http://www6.chappell-family.co.uk/ An IPv6-only-URL]
Accept the warning about dragons, and then in the filter bar enter:
Accept the warning about dragons, and then in the filter bar enter:
ipv6
ipv6
The resulting list should now show an entry:
The resulting list should now show an entry:
network.dns.disableIPv6
network.dns.disableIPv6
If this entry is set to '''true''' then double click on the entry to change its sense to '''FALSE'''. Then try again!
If this entry is set to '''true''' then double click on the entry to change its sense to '''FALSE'''. Then try again!
=== IPv6-only URL Test ===
=== IPv6-only URL Test ===
and finally pointing your web browser towards my [http://pi.ipv6.chappell-family.co.uk/ IPv6-only Raspberry Pi Powered port scanner] should also work.
and finally pointing your web browser towards the [http://www64.chappell-family.co.uk/cgi-bin6/ipscanjs.cgi IPv6-only Raspberry Pi Powered port scanner] should also work.
This website publishes a Privacy Policy (link at the bottom of every page). Continued use of this website implies your consent to the use of data outlined in the policy.