Private alternative to DynDns and, thanks to Cloudflare, completely free.

Create an API Token

Manage access and permissions for your accounts, sites, and products.

Token name

Netguard 3.0 (curl)

Permissions

Zone - DNS - Edit

Zone Resources

Include - Specific Zone - grupopv.mx

Client IP Address Filtering

Is in - 189.178.0.0/16, 201.174.104.210

List Zones

List the zones to get the zone ID.

curl --ipv4 -H "Authorization: Bearer K-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" -H "Content-Type:application/json" -X GET "https://api.cloudflare.com/client/v4/zones/" ; echo

Create DNS Record

Create a new DNS record for a zone.

curl --ipv4 -H "Authorization: Bearer K-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" -H "Content-Type:application/json" -X POST "https://api.cloudflare.com/client/v4/zones/7f95fa1d6b62c55ccf84ad1980911825/dns_records" --data '{"type":"A","name":"fg.gdl","content":"127.0.0.1","ttl":60,"proxied":false}' ; echo

Patch DNS Record

Patch the DNS record for a zone.

curl --ipv4 -H "Authorization: Bearer K-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" -H "Content-Type:application/json" -X PATCH "https://api.cloudflare.com/client/v4/zones/7f95fa1d6b62c55ccf84ad1980911825/dns_records/bf0a355e85afc458ce968abefb066c75" --data '{"content":"127.0.0.127"}' ; echo

Patch the DNS record with the current public IP.

curl --ipv4 -H "Authorization: Bearer K-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" -H "Content-Type:application/json" -X PATCH "https://api.cloudflare.com/client/v4/zones/7f95fa1d6b62c55ccf84ad1980911825/dns_records/bf0a355e85afc458ce968abefb066c75" --data '{"content":"'$(curl checkip.amazonaws.com)'"}' ; echo

Schedule Patch DNS Record

Crontab: ev3.nit.mx

*/2 * * * * curl --ipv4 -X PATCH -H Content-Type:application/json -H "Authorization: Bearer K-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" --data '{"content":"'$(curl checkip.amazonaws.com)'"}' https://api.cloudflare.com/client/v4/zones/a4a18e894753cce26d07e26ef473d2ab/dns_records/c41475b8603d330ab4d9b5eba3e5349a

Windows: fg.gdl.grupopv.mx:444

schtasks /create /tn "Netguard 3.0" /tr "%userprofile%\projects\batch\netguard\app.vbs" /sc minute /mo 2

projects\batch\netguard\app.vbs

Set WshShell = WScript.CreateObject("WScript.Shell") 
WshShell.Run """%userprofile%\projects\batch\netguard\app.bat""", 0 , false

projects\batch\netguard\app.bat

@echo off
cd %userprofile%\projects\batch\netguard
curl checkip.amazonaws.com > public_ip.tmp
set /p public_ip= < public_ip.tmp
del public_ip.tmp
curl --ipv4 -X PATCH -H Content-Type:application/json -H "Authorization: Bearer K-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" --data "{\"content\":\"%public_ip%\"}" https://api.cloudflare.com/client/v4/zones/7f95fa1d6b62c55ccf84ad1980911825/dns_records/bf0a355e85afc458ce968abefb066c75
echo.

cetinajero/Netguard v3.0.md