Created
March 15, 2021 16:49
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#/usr/bin/env sh | |
# Get the Zone ID from: https://www.cloudflare.com/a/overview/<your-domain> | |
DNS_ZONE=*** | |
# Get the existing identifier for DNS entry: | |
# https://api.cloudflare.com/#dns-records-for-a-zone-list-dns-records | |
IDENTIFIER=*** | |
# Get these from: https://www.cloudflare.com/a/account/my-account | |
AUTH_EMAIL=*** | |
AUTH_KEY=*** | |
# Desired domain name | |
DOMAIN_NAME="***" | |
# Get previous IP address | |
_PREV_IP_FILE="/tmp/public-ip.txt" | |
_PREV_IP=$(cat $_PREV_IP_FILE) | |
# Curl fritzbox public IP | |
_IP=$(curl "http://192.168.1.1:49000/igdupnp/control/WANIPConn1" \ | |
-H "Content-Type: text/xml; charset="utf-8"" \ | |
-H "SoapAction:urn:schemas-upnp-org:service:WANIPConnection:1#GetExternalIPAddress" \ | |
-d "<?xml version='1.0' encoding='utf-8'?> <s:Envelope s:encodingStyle='http://schemas.xmlsoap.org/soap/encoding/' xmlns:s='http://schemas.xmlsoap.org/soap/envelope/'> <s:Body> <u:GetExternalIPAddress xmlns:u='urn:schemas-upnp-org:service:WANIPConnection:1' /> </s:Body> </s:Envelope>" \ | |
-s | grep -Eo '\<[[:digit:]]{1,3}(\.[[:digit:]]{1,3}){3}\>') | |
#_IP=$(curl --silent https://api.ipify.org) | |
echo $_IP | |
# If new/previous IPs match, no need for an update. | |
if [ "$_IP" = "$_PREV_IP" ]; then | |
exit 0 | |
fi | |
echo $_IP | |
_UPDATE=$(cat <<EOF | |
{ "type": "A", | |
"name": "$DOMAIN_NAME", | |
"content": "$_IP", | |
"ttl": 120, | |
"proxied": true } | |
EOF | |
) | |
curl "https://api.cloudflare.com/client/v4/zones/$DNS_ZONE/dns_records/$IDENTIFIER" \ | |
--silent \ | |
-X PUT \ | |
-H "Content-Type: application/json" \ | |
-H "X-Auth-Email: $AUTH_EMAIL" \ | |
-H "X-Auth-Key: $AUTH_KEY" \ | |
-d "$_UPDATE" > /tmp/cloudflare-ddns-update.json && \ | |
echo $_IP > $_PREV_IP_FILE |
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