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Firsh/lwp-cloudflare-dyndns.sh

Last active April 23, 2025 15:56
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Revisions

  1. Firsh revised this gist Jul 11, 2019. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion lwp-cloudflare-dyndns.sh
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    @@ -1,5 +1,5 @@
    #!/bin/bash
    # CloudFlare as Dynamic DNS
    # Cloudflare as Dynamic DNS
    # From: https://letswp.io/cloudflare-as-dynamic-dns-raspberry-pi/
    # Based on: https://gist.github.com/benkulbertis/fff10759c2391b6618dd/
    # Original non-RPi article: https://phillymesh.net/2016/02/23/setting-up-dynamic-dns-for-your-registered-domain-through-cloudflare/
  2. Firsh revised this gist Oct 2, 2018. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion lwp-cloudflare-dyndns.sh
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    Original file line number Diff line number Diff line change
    @@ -1,6 +1,6 @@
    #!/bin/bash
    # CloudFlare as Dynamic DNS
    # From: https://letswp.io/raspberry-pi-cloudflare-dynamic-dns/
    # From: https://letswp.io/cloudflare-as-dynamic-dns-raspberry-pi/
    # Based on: https://gist.github.com/benkulbertis/fff10759c2391b6618dd/
    # Original non-RPi article: https://phillymesh.net/2016/02/23/setting-up-dynamic-dns-for-your-registered-domain-through-cloudflare/

  3. Firsh revised this gist Oct 1, 2018. 1 changed file with 3 additions and 2 deletions.
    5 changes: 3 additions & 2 deletions lwp-cloudflare-dyndns.sh
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    Original file line number Diff line number Diff line change
    @@ -1,7 +1,8 @@
    #!/bin/bash
    # CloudFlare as Dynamic DNS
    # From https://letswp.io/raspberry-pi-cloudflare-dynamic-dns/
    # Based on https://gist.github.com/benkulbertis/fff10759c2391b6618dd/
    # From: https://letswp.io/raspberry-pi-cloudflare-dynamic-dns/
    # Based on: https://gist.github.com/benkulbertis/fff10759c2391b6618dd/
    # Original non-RPi article: https://phillymesh.net/2016/02/23/setting-up-dynamic-dns-for-your-registered-domain-through-cloudflare/

    # Update these with real values
    auth_email="[email protected]"
  4. Firsh created this gist Oct 1, 2018.
    60 changes: 60 additions & 0 deletions lwp-cloudflare-dyndns.sh
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    #!/bin/bash
    # CloudFlare as Dynamic DNS
    # From https://letswp.io/raspberry-pi-cloudflare-dynamic-dns/
    # Based on https://gist.github.com/benkulbertis/fff10759c2391b6618dd/

    # Update these with real values
    auth_email="[email protected]"
    auth_key="global_api_key_goes_here"
    zone_name="example.com"
    record_name="home.example.com"

    # Don't touch these
    ip=$(curl -s http://ipv4.icanhazip.com)
    ip_file="ip.txt"
    id_file="cloudflare.ids"
    log_file="cloudflare.log"

    # Keep files in the same folder when run from cron
    current="$(pwd)"
    cd "$(dirname "$(readlink -f "$0")")"

    log() {
    if [ "$1" ]; then
    echo -e "[$(date)] - $1" >> $log_file
    fi
    }

    log "Check Initiated"

    if [ -f $ip_file ]; then
    old_ip=$(cat $ip_file)
    if [ $ip == $old_ip ]; then
    log "IP has not changed."
    exit 0
    fi
    fi

    if [ -f $id_file ] && [ $(wc -l $id_file | cut -d " " -f 1) == 2 ]; then
    zone_identifier=$(head -1 $id_file)
    record_identifier=$(tail -1 $id_file)
    else
    zone_identifier=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones?name=$zone_name" -H "X-Auth-Email: $auth_email" -H "X-Auth-Key: $auth_key" -H "Content-Type: application/json" | grep -Po '(?<="id":")[^"]*' | head -1 )
    record_identifier=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records?name=$record_name" -H "X-Auth-Email: $auth_email" -H "X-Auth-Key: $auth_key" -H "Content-Type: application/json" | grep -Po '(?<="id":")[^"]*')
    echo "$zone_identifier" > $id_file
    echo "$record_identifier" >> $id_file
    fi

    update=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records/$record_identifier" -H "X-Auth-Email: $auth_email" -H "X-Auth-Key: $auth_key" -H "Content-Type: application/json" --data "{\"id\":\"$zone_identifier\",\"type\":\"A\",\"name\":\"$record_name\",\"content\":\"$ip\"}")

    if [[ $update == *"\"success\":false"* ]]; then
    message="API UPDATE FAILED. DUMPING RESULTS:\n$update"
    log "$message"
    echo -e "$message"
    exit 1
    else
    message="IP changed to: $ip"
    echo "$ip" > $ip_file
    log "$message"
    echo "$message"
    fi