From 25945b8fead989cca09a23983623b63ce36dcc0c Mon Sep 17 00:00:00 2001 From: Christian Cleberg Date: Mon, 8 Jan 2024 20:11:17 -0600 Subject: feat: total re-write from Emacs org-mode to Zola markdown --- blog/2022-03-23-cloudflare-dns-api.org | 191 --------------------------------- 1 file changed, 191 deletions(-) delete mode 100644 blog/2022-03-23-cloudflare-dns-api.org (limited to 'blog/2022-03-23-cloudflare-dns-api.org') diff --git a/blog/2022-03-23-cloudflare-dns-api.org b/blog/2022-03-23-cloudflare-dns-api.org deleted file mode 100644 index 3a80a71..0000000 --- a/blog/2022-03-23-cloudflare-dns-api.org +++ /dev/null @@ -1,191 +0,0 @@ -#+title: Dynamic DNS with Cloudflare API -#+date: 2022-03-23 - -** DDNS: Dynamic DNS -:PROPERTIES: -:CUSTOM_ID: ddns-dynamic-dns -:END: -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 [[https://api.cloudflare.com/][Cloudflare -API]] 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: - -#+begin_src sh -sudo apt install jq -#+end_src - -Next, create a location for your DDNS update scripts and open the first -script: - -#+begin_src sh -mkdir ~/ddns -nano ~/ddns/update.sh -#+end_src - -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. - -#+begin_src 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=$subdomain /home//ddns/ddns.sh -done -#+end_src - -Next, open up the =ddns.sh= script. Paste the following into the script -and update the =api_token= and =email= variables. - -#+begin_src sh -nano ~/ddns/ddns.sh -#+end_src - -:warning: *Note*: If you want your DNS records to be proxied through -Cloudflare, find and update the following snippet: =\"proxied\":false}"= -to say =true= instead of =false=. - -#+begin_src sh -# file: ddns.sh -#!/bin/bash -# based on https://gist.github.com/Tras2/cba88201b17d765ec065ccbedfb16d9a -# initial data; they need to be filled by the user -## API token -api_token= -## email address associated with the Cloudflare account -email= - -# get the basic data -ipv4=$(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 -#+end_src - -Once the script is saved and closed, make the scripts executable: - -#+begin_src sh -chmod +x ~/ddns/ddns.sh -chmod +x ~/ddns/update.sh -#+end_src - -You can test the script by running it manually: - -#+begin_src sh -./update.sh -#+end_src - -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: - -#+begin_src sh -crontab -e -#+end_src - -In the cron file, paste the following at the bottom of the editor: - -#+begin_src sh -*/5 * * * * bash /home//ddns/update.sh -#+end_src -- cgit v1.2.3-70-g09d2