From 2be43cc479dfd4cfb621f14381330c708291e324 Mon Sep 17 00:00:00 2001 From: Christian Cleberg Date: Sun, 28 Jul 2024 19:46:20 -0500 Subject: conversion from Zola to Weblorg --- content/blog/2022-03-23-cloudflare-dns-api.md | 190 -------------------------- 1 file changed, 190 deletions(-) delete mode 100644 content/blog/2022-03-23-cloudflare-dns-api.md (limited to 'content/blog/2022-03-23-cloudflare-dns-api.md') diff --git a/content/blog/2022-03-23-cloudflare-dns-api.md b/content/blog/2022-03-23-cloudflare-dns-api.md deleted file mode 100644 index 07a89f5..0000000 --- a/content/blog/2022-03-23-cloudflare-dns-api.md +++ /dev/null @@ -1,190 +0,0 @@ -+++ -date = 2022-03-23 -title = "Dynamic DNS with Cloudflare API" -description = "" -draft = false -+++ - -# DDNS: Dynamic DNS - -If you're hosting a service from a location with dynamic DNS (where your IP may -change at any time), you must have a solution to update the DNS so that you can -access your service even when the IP of the server changes. - -The process below uses the [Cloudflare API](https://api.cloudflare.com/) to -update DNS `A` and `AAAA` records with the server's current IP. If you use -another DNS provider, you will have to find a way to update your DNS (or find a -way to get a static IP). - -First, install `jq` since we will use it in the next script: - -```sh -sudo apt install jq -``` - -Next, create a location for your DDNS update scripts and open the first script: - -```sh -mkdir ~/ddns -nano ~/ddns/update.sh -``` - -The following `update.sh` script will take all of your domains and subdomains -and check Cloudflare to see if the current `A` and `AAAA` records match your -server's IP address. If not, it will update the records. - -```sh -# file: update.sh -#!/bin/bash - -# Update TLDs -domains=(example.com example.net) - -for domain in "${domains[@]}" -do - echo -e "\nUpdating $domain..." - zone_name=$domain /home//ddns/ddns.sh -done - -# Update subdomains for example.com -domain=example.com -subdomains=(photos.example.com) - -for subdomain in "${subdomains[@]}" -do - echo -e "\nUpdating $subdomain..." - zone_name=$domain dns_record=$subdomain /home//ddns/ddns.sh -done -``` - -Next, open up the `ddns.sh` script. Paste the following into the script and -update the `api_token` and `email` variables. - -```sh -nano ~/ddns/ddns.sh -``` - -**Note**: If you want your DNS records to be proxied through Cloudflare, find -and update the following snippet: `"proxied":false}"` to say `true` instead of -`false`. - -```sh -# file: ddns.sh -#!/bin/bash -# based on https://gist.github.com/Tras2/cba88201b17d765ec065ccbedfb16d9a -# initial data; they need to be filled by the user -## API token -api_token= -## email address associated with the Cloudflare account -email= - -# get the basic data -ipv4=$(curl -s -X GET -4 https://ifconfig.co) -ipv6=$(curl -s -X GET -6 https://ifconfig.co) -user_id=$(curl -s -X GET "https://api.cloudflare.com/client/v4/user/tokens/verify" \ - -H "Authorization: Bearer $api_token" \ - -H "Content-Type:application/json" \ - | jq -r '{"result"}[] | .id' - ) - -echo "Your IPv4 is: $ipv4" -echo "Your IPv6 is: $ipv6" - -# check if the user API is valid and the email is correct -if [ $user_id ] -then - zone_id=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones?name=$zone_name&status=active" \ - -H "Content-Type: application/json" \ - -H "X-Auth-Email: $email" \ - -H "Authorization: Bearer $api_token" \ - | jq -r '{"result"}[] | .[0] | .id' - ) - # check if the zone ID is - if [ $zone_id ] - then - # check if there is any IP version 4 - if [ $ipv4 ] - then - dns_record_a_id=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$zone_id/dns_records?type=A&name=$dns_record" \ - -H "Content-Type: application/json" \ - -H "X-Auth-Email: $email" \ - -H "Authorization: Bearer $api_token" - ) - # if the IPv6 exist - dns_record_a_ip=$(echo $dns_record_a_id | jq -r '{"result"}[] | .[0] | .content') - echo "The set IPv4 on Cloudflare (A Record) is: $dns_record_a_ip" - if [ $dns_record_a_ip != $ipv4 ] - then - # change the A record - curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/$zone_id/dns_records/$(echo $dns_record_a_id | jq -r '{"result"}[] | .[0] | .id')" \ - -H "Content-Type: application/json" \ - -H "X-Auth-Email: $email" \ - -H "Authorization: Bearer $api_token" \ - --data "{"type":"A","name":"$dns_record","content":"$ipv4","ttl":1,"proxied":false}" \ - | jq -r '.errors' - else - echo "The current IPv4 and DNS record IPv4 are the same." - fi - else - echo "Could not get your IPv4. Check if you have it; e.g. on https://ifconfig.co" - fi - - # check if there is any IP version 6 - if [ $ipv6 ] - then - dns_record_aaaa_id=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$zone_id/dns_records?type=AAAA&name=$dns_record" \ - -H "Content-Type: application/json" \ - -H "X-Auth-Email: $email" \ - -H "Authorization: Bearer $api_token" - ) - # if the IPv6 exist - dns_record_aaaa_ip=$(echo $dns_record_aaaa_id | jq -r '{"result"}[] | .[0] | .content') - echo "The set IPv6 on Cloudflare (AAAA Record) is: $dns_record_aaaa_ip" - if [ $dns_record_aaaa_ip != $ipv6 ] - then - # change the AAAA record - curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/$zone_id/dns_records/$(echo $dns_record_aaaa_id | jq -r '{"result"}[] | .[0] | .id')" \ - -H "Content-Type: application/json" \ - -H "X-Auth-Email: $email" \ - -H "Authorization: Bearer $api_token" \ - --data "{"type":"AAAA","name":"$dns_record","content":"$ipv6","ttl":1,"proxied":false}" \ - | jq -r '.errors' - else - echo "The current IPv6 and DNS record IPv6 are the same." - fi - else - echo "Could not get your IPv6. Check if you have it; e.g. on https://ifconfig.co" - fi - else - echo "There is a problem with getting the Zone ID. Check if the Zone Name is correct." - fi -else - echo "There is a problem with either the email or the password" -fi -``` - -Once the script is saved and closed, make the scripts executable: - -```sh -chmod +x ~/ddns/ddns.sh -chmod +x ~/ddns/update.sh -``` - -You can test the script by running it manually: - -```sh -./update.sh -``` - -To make sure the scripts run automatically, add it to the `cron` file so that it -will run on a schedule. To do this, open the cron file: - -```sh -crontab -e -``` - -In the cron file, paste the following at the bottom of the editor: - -```sh -*/5 ** ** ** ** bash /home//ddns/update.sh -``` -- cgit v1.2.3-70-g09d2