Easy update DNS via Cloudfare API

upddns.sh

# Script from:
# https://postapocalyptech.com/posts/use_cloudflare_ddns/
# adjusted for OpenWrt's ash

# Running curl command and getting your IP address using akamai's service
# Store it in IPADDRNOW variable

IPADDRNOW=$(curl -s http://whatismyip.akamai.com/); \

# Using cat to read stored IP address and then putting it in STOREDIP variable

STOREDIP=`cat /tmp/ipaddrnow.txt 2>/dev/null`;\

# Comparing the stored IP address to the curl result - if it differs,
# we'll use Curl to send the new IP address through Cloudflare's API
# You'll need to fill in your home folder for the ipaddrnow.txt file,
# your email address, your key, zone_ID, DNS_ID, and (domain) Name
 
if [ "$IPADDRNOW" != "$STOREDIP" ]; \
then
echo $IPADDRNOW > /tmp/ipaddrnow.txt; \
EMAIL="[email protected]"; \
KEY="abcdefgh"; \
ZONE_ID="abcdefgh"; \
DNS_ID="abcdefgh"; \
TYPE="A"; \
NAME="gw.penzion-hello.sk"; \
PROXIED="false"; \
TTL="120";\
curl -X PUT "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/dns_records/$DNS_ID" \
-H "X-Auth-Email: $EMAIL" \
-H "X-Auth-Key: $KEY" \
-H "Content-Type: application/json" \
--data '{"type":"'"$TYPE"'","name":"'"$NAME"'","content":"'"$IPADDRNOW"'","proxied":'"$PROXIED"',"ttl":'"$TTL"'}'
fi