Use ipv4only.arpa for DNS64 detection.
We currently use DNS lokoups to ipv4.google.com to do DNS64
detection. Now that RFC 7050 has been published and
ipv4only.arpa has been published by IANA, switch to using that.
Change-Id: Ia9ebc5db77364104f5888edb53468d29dc618d34
diff --git a/clatd.conf b/clatd.conf
index 086d39a..b17b862 100644
--- a/clatd.conf
+++ b/clatd.conf
@@ -8,7 +8,7 @@
# get the plat_subnet from dns lookups (requires DNS64)
plat_from_dns64 yes
# hostname to use to lookup plat subnet. must contain only A records
-plat_from_dns64_hostname ipv4.google.com
+plat_from_dns64_hostname ipv4only.arpa
# plat subnet to send ipv4 traffic to. This is a /96 subnet.
# This setting only makes sense with: plat_from_dns64 no
