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

Netguard v3.0.md

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.