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| #!/bin/sh | |
| # modified by jfro from http://www.cnysupport.com/index.php/linode-dynamic-dns-ddn$ | |
| # Update: changed because the old IP-service wasn't working anymore | |
| # Uses curl to be compatible with machines that don't have wget by default | |
| # modified by Ross Hosman for use with cloudflare. | |
| # modified by Jon Egerton to add logging | |
| # modified by Jon Egerton to update to cloud flare api v4 (see https://api.cloudflare.com) | |
| # | |
| # This version is working as at 8-Aug-2018 | |
| # As/When cloudflare change their API amendments may be required | |
| # Latest versions of these scripts are here: https://github.com/jonegerton/cloudflare-ddns | |
| # | |
| # To schedule: | |
| # run `crontab -e` and add next line (without the leading #): | |
| # */5 * * * * bash {set file location here}/cf-ddns.sh >/dev/null 2>&1 | |
| # this will run the script every 5 minutes. The IP is cached, so requests are only sent | |
| # when the WAN IP has changed. Log output is minimal, so shouldn't grow too large. | |
| # | |
| # Use strictly at your own risk | |
| cfuser= #Account user name | |
| cfkey= #Global API Key from My Account > API Keys | |
| cfzonekey= #Zone ID from zone overview page | |
| cfhost= #Name of the host entry | |
| cfhostkey= #ID of the host entry (run cf-ddns-read.sh) | |
| cfttl=1 #=automatic - needs to be set in curl request otherwise reverts to a default. Set to the correct value | |
| cfproxied=true # also needs to eb set in curl request otherwise reverts to false. Set to the correct value | |
| log=/var/log/cf-ddns-update.log #Set to desired log output location | |
| date +"%F %T" >> $log | |
| WAN_IP=`curl -s http://icanhazip.com` | |
| if [ -f wan_ip-cf.txt ]; then | |
| OLD_WAN_IP=`cat wan_ip-cf.txt` | |
| else | |
| echo "No file, need IP" >> $log | |
| OLD_WAN_IP="" | |
| fi | |
| if [ "$WAN_IP" = "$OLD_WAN_IP" ]; then | |
| echo "IP Unchanged" >> $log | |
| else | |
| echo $WAN_IP > wan_ip-cf.txt | |
| echo "Updating DNS to $WAN_IP" >> $log | |
| data="{\"type\":\"A\",\"name\":\"$cfhost\",\"content\":\"$WAN_IP\",\"ttl\":$cfttl,\"proxied\":$cfproxied}" | |
| echo "data: $data" >> $log | |
| curl -X PUT "https://api.cloudflare.com/client/v4/zones/$cfzonekey/dns_records/$cfhostkey" \ | |
| -H "X-Auth-Key: $cfkey" \ | |
| -H "X-Auth-Email: $cfuser" \ | |
| -H "Content-Type: application/json" \ | |
| --data $data >> $log | |
| fi |