ipv6 reverse lookup

[candrews]

First thing first - thank you for support ipv6! Too few providers support it, and I really appreciate that you're going the extra mile on these "niceties."

I've set up my server for IPv6 with sixxs.net. That works great.

I've added ns1-auth.ipv6.rollernet.us and ns2-auth.ipv6.rollernet.us as reverse delegates for my subnet. Then I created a PTR record in my domain:
irrational.integralblue.com 86400 PTR 5.9.5.c.1.f.e.f.f.f.c.4.0.e.2.0.0.0.0.0.5.b.1.0.8.7.9.4.1.0.0.2.ip6.arpa

The forward record is:
irrational.integralblue.com 86400 AAAA 2001:4978:1b5:0:2e0:4cff:fef1:c595

Yet when I do:
dig -x 2001:4978:1b5:0:2e0:4cff:fef1:c595

I get no results.

It's not a big deal if this never works - it's just a nice to have. Any ideas? Thanks!

[RollerNetSupport]

We verified that the reverse delegation is set up correctly - it is. If you do "dig +trace 5.9.5.c.1.f.e.f.f.f.c.4.0.e.2.0.0.0.0.0.5.b.1.0.8.7.9.4.1.0.0.2.ip6.arpa" you'll see it goes all the way to our servers.

The authoritative zone for a reverse lookup is always under the "arpa" domain. First, split the nibble at your IPv6 network boundary 2001:4978:1b5::/48 which gives us "5.b.1.0.8.7.9.4.1.0.0.2.ip6.arpa". This is your reverse zone. Add a new Primary DNS zone of "5.b.1.0.8.7.9.4.1.0.0.2.ip6.arpa".

Then, under that zone, create a PTR record with name "5.9.5.c.1.f.e.f.f.f.c.4.0.e.2.0.0.0.0.0" (the remaining nibbles) and value "irrational.integralblue.com". This will give you a reverse IPv6 lookup. Repeat for any other reverse IPv6 PTR's you want by cutting off the "5.b.1.0.8.7.9.4.1.0.0.2.ip6.arpa" part and adding a PTR record for the remaining nibbles.

[candrews]

I'm constantly impressed by your service and support. Thank for the incredibly quick and high quality reply - I've made the change and I'll check it once it in a few minutes.

[RollerNetSupport]

No problem. Please let us know if you have any issues with our IPv6 service - we intend for it to be fully supported as much as possible.

[candrews]

So far (I've been using it for about a month) it's been great.

It would be nice if smtpauth.rollernet.us did ipv6 too though, so incoming and outgoing mail would be completely ipv6. Not a big deal though

[RollerNetSupport]

Looks good to us:

Code: Select all

$ host 2001:4978:1b5:0:2e0:4cff:fef1:c595 ns2-auth.ipv6.rollernet.us
Using domain server:
Name: ns2-auth.ipv6.rollernet.us
Address: 2620:0:950:f100:216:3eff:fe2f:8006#53
Aliases:

5.9.5.c.1.f.e.f.f.f.c.4.0.e.2.0.0.0.0.0.5.b.1.0.8.7.9.4.1.0.0.2.ip6.arpa domain name pointer irrational.integralblue.com.

We will be adding IPv6 support to our mail services in the near future.

[candrews]

I'd love to set my MX record to an ipv6 enabled server - any progress on adding AAAA records to mail.rollernet.us or perhaps mail.ipv6.rollernet.us?

[RollerNetSupport]

Adding IPv6 support for our mail services is the ultimate goal, however it still presents a lot of different problems to work on. For example, in something as simple as the mail logs, IP addresses are stored as their integer value to make searching easy. It's easy to handle a 32-bit integer - not as easy to store and search a single 128-bit integer because unfortunately MySQL (which we use for the mail logs) doesn't have either a 128-bit int type or a v6-aware "cidr" type like postgres does.

We don't have a progress meter for when IPv6 will be released for mail services, but it will be as soon as we can manage to.

[candrews]

Sounds great - I'll keep on the lookout. Speaking of which, do you have an RSS feed or something I could watch for so I know when this available, or a mailing list?

Also, I wrote about my excellent experience with you on my blog at http://candrews.integralblue.com/2009/01/ipv6-setup/ - I hope ithelps a few more lucky people discover your excellent services.

[candrews]

IPv6 support (for both connections and a CIDR data type with related functions) was added in MySQL 6.0, so that's a while away. http://bugs.mysql.com/bug.php?id=3318

I have found a decent article describing different options for storing IPv6 addresses in mysql now, and performance analysis of each option: http://www.koopman.me/2008/04/storing-i ... -in-mysql/

This seems like a fascinating problem to be working on - good luck!

[RollerNetSupport]

No RSS feeds yet, although we do post announcements here. We were hoping to add RSS to the forums when we get around to upgrading it.