<div dir="auto"><div dir="auto">I'll give those tools a try, but I don't understand how my client is requesting an A record. It only has IPv6 networking. DNS64 should be requesting an A record, but that the client should see is the converted AAAA record. Is that not right?</div><div dir="auto"><br></div><div dir="auto">Rick</div></div><br><div class="gmail_quote"><div dir="ltr">On Wed, Apr 11, 2018, 5:27 PM Chuck Swiger <<a href="mailto:cswiger@mac.com">cswiger@mac.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Apr 11, 2018, at 3:09 PM, Rick Tillery <<a href="mailto:rtillerywork@gmail.com" target="_blank" rel="noreferrer">rtillerywork@gmail.com</a>> wrote:<br>
> I appear to have my NAT64+DN64 IPv6 -> IPv4 network configured correctly, as I can access IPv4 only Internet sites, e.g. from my browser. But some tools don't seem to work the way I think they should.<br>
> <br>
> One example is nslookup. If do nslookup <a href="http://ipv4.google.com" rel="noreferrer noreferrer" target="_blank">ipv4.google.com</a>, I get:<br>
> <br>
> $ nslookup <a href="http://ipv4.google.com" rel="noreferrer noreferrer" target="_blank">ipv4.google.com</a><br>
> Server: 2001:4:1f:98::2<br>
> Address: 2001:4:1f:98::2#53<br>
> <br>
> Non-authoritative answer:<br>
> <a href="http://ipv4.google.com" rel="noreferrer noreferrer" target="_blank">ipv4.google.com</a> canonical name = <a href="http://ipv4.l.google.com" rel="noreferrer noreferrer" target="_blank">ipv4.l.google.com</a>.<br>
> Name: <a href="http://ipv4.l.google.com" rel="noreferrer noreferrer" target="_blank">ipv4.l.google.com</a><br>
> Address: 216.58.218.110<br>
> <br>
> Shouldn't the address (last line) be an IPv6 address (prefixed IPv4 address, created by NAT64, such as 64:ff9b::216.58.218.110)?<br>
<br>
Nope. Whether your local system connects to IPv4 addresses via NAT64-formatted IPv6 addresses is unrelated to DNS lookups of A or AAAA records. If you ask for an A record, you will get IPv4 address(es) back or 0 records, not an IPv6 address.<br>
<br>
By the way, debugging DNS issues by using nslookup is difficult; try switching to dig and consider the results of running "dig -t a <a href="http://ipv4.l.google.com" rel="noreferrer noreferrer" target="_blank">ipv4.l.google.com</a>." and "dig -t aaaa <a href="http://ipv4.l.google.com" rel="noreferrer noreferrer" target="_blank">ipv4.l.google.com</a>."<br>
<br>
Regards,<br>
-- <br>
-Chuck<br>
<br>
</blockquote></div>