diff --git a/cfddnsv6.sh b/cfddnsv6.sh
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+#!/bin/bash
+
+# AUTHOR: Josh North
+# EMAIL: josh.north@point808.com
+# BRIEF: This script updates CloudFlare IPv6 DNS records with your current IP
+#     address, as pulled from the interface directly. Best use case is having an
+#     ISP who arbitrarily changes your prefix.  For safety, we do not create
+#     records, we only update records that match the hostname in the zone, so
+#     you must log in to CloudFlare and create your records first!
+# USAGE: Put this file in /usr/local/bin/cfddnsv6.sh or wherever you prefer is ok.
+#     Make sure to chmod +x and make it executable.  Change the settings below to
+#     Match your login and environment needs.  Run it from command line to test.
+#     Right now we run this from cron--- at reboot and every so often after.
+#     This example runs it at reboot and every half hour, adjust to taste
+#         @reboot /usr/local/bin/cfddnsv6.sh >/dev/null 2>&1
+#         */30 * * * * /usr/local/bin/cfddnsv6.sh >/dev/null 2>&1
+
+# SETTINGS:
+CF_EMAIL="you@zone.com"          # Email address you use to log in to CloudFlare.
+CF_KEY="YourApiKeyHere"          # API key for CloudFlare account (get from Account Settings page).
+CF_ZONE="zone.com"               # MUST match zone you want to update host in!
+CF_HOST="webserver"              # Hostname of record.  Create in CloudFlare first!
+CF_IF="eth0"                     # What interface should we get the IP address for?
+CF_LOG="/var/log/cfddnsv6.log"   # Where to log actions taken by this script.
+
+# -------------------- NOTHING TO CHANGE BELOW THIS LINE --------------------
+# CloudFlare API URI
+CF_URL="https://api.cloudflare.com/client/v4"
+CF_AUTH=(-H "X-Auth-Email: $CF_EMAIL" -H "X-Auth-Key: $CF_KEY" -H "Content-Type: application/json")
+CURLCMD="curl -sS -X"
+
+# Make sure we have all needed programs
+command -v curl >/dev/null 2>&1 || { echo "This script requires curl but I cannot find it on this system...  Exiting now." >&2; exit 1; }
+
+# Log start of script
+printf "%s\n" "$(date) Beginning DNS update process" >> $CF_LOG
+
+# This is a pause to wait for tentative addresses to disappear.  You may comment this out if you have reason to do so, I include it because in my networks, these addresses go away.
+while ip -6 addr show tentative | grep . > /dev/null ; do sleep 1 ; done
+
+# Try to get the best global address from the chosen interface
+CF_IPV6=$(ip addr show dev $CF_IF | grep -Ev "deprecated" | sed -e's/^.*inet6 \([^ ]*\)\/.*$/\1/;t;d' | grep -Ev "^fd|^fe80" | sed -n '$p')
+
+# Look up CloudFlare zone identifier
+CF_ZONE_ID=$($CURLCMD GET "$CF_URL/zones?name=$CF_ZONE" "${CF_AUTH[@]}" | cut -d '"' -f6)
+
+# Get record identifier from CloudFlare
+CF_RECORD_ID=$($CURLCMD GET "$CF_URL/zones/$CF_ZONE_ID/dns_records?type=AAAA&name=$CF_HOST.$CF_ZONE" "${CF_AUTH[@]}" | cut -d '"' -f6)
+
+# Log what we are going to try
+printf "%s\n" "$(date) IP on $CF_IF is $CF_IPV6" >> $CF_LOG
+printf "%s\n" "$(date) Record to update is $CF_HOST.$CF_ZONE ($CF_RECORD_ID)" >> $CF_LOG
+
+# Build the request string and submit
+CF_REQUEST=$($CURLCMD PUT "$CF_URL/zones/$CF_ZONE_ID/dns_records/$CF_RECORD_ID" "${CF_AUTH[@]}" \
+             --data "{\"id\":\"$CF_RECORD_ID\",\"type\":\"AAAA\",\"name\":\"$CF_HOST\",\"content\":\"$CF_IPV6\",\"zone_id\":\"$CF_ZONE_ID\",\"zone_name\":\"$CF_ZONE\",\"data\":{}}" | sed -n -e 's/^.*\("success":\)/\1/p')
+
+# Log output
+printf "%s\n" "$(date) Result string is $CF_REQUEST" >> $CF_LOG
+
+# All done
+exit 0
+# EOF