vercel-anti-ispblock

🚀 Bypass ISP Blocking – Change Your DNS

A simple guide to bypass ISP DNS blocking when a legitimate website is redirected to a government or ISP block page (for example blocked.sbmd.cicc.gov.ph).

This guide shows how to switch to Cloudflare DNS (1.1.1.1) so your device queries a neutral DNS resolver instead of your ISP’s DNS.

📑 Table of Contents

Why DNS Blocking Happens
How DNS Resolution Works
How ISPs Block Websites
How Public DNS Bypasses the Block
Change Your DNS
Verify DNS
Troubleshooting

🌐 Why DNS Blocking Happens

Your Internet Service Provider (ISP) controls the default DNS servers your device uses.

When regulators require a domain to be blocked, the ISP modifies its DNS server so that:

example.com → returns block page IP instead of real IP

Instead of sending you to the real server, you are redirected to a government block page.

⚙️ How DNS Resolution Works

flowchart LR
    A[User Browser] --> B[ISP DNS Server]
    B --> C[Real Website IP]
    C --> D[Website Server]
    D --> A

Normal DNS Flow

Your browser asks the ISP DNS server for a domain.
DNS returns the correct IP address.
Your browser connects to the website.

🚫 How ISPs Block Websites

flowchart LR
    A[User Browser] --> B[ISP DNS Server]
    B --> E[Block Page IP]
    E --> F[Block Page Server]
    F --> A

DNS Blocking Flow

You request the real website.
ISP DNS intercepts the request.
DNS returns the IP of the block page instead.

Result: You see the block notice instead of the real website.

🔓 How Public DNS Bypasses the Block

flowchart LR
    A["User Browser"] --> G["Cloudflare DNS (1.1.1.1)"]
    G --> C["Real Website IP"]
    C --> D["Website Server"]
    D --> A

What Changes

Your device now asks Cloudflare DNS instead of your ISP DNS.
The ISP no longer controls the domain resolution.

🛠 Change Your DNS

Recommended DNS

Cloudflare Public DNS

Primary:    1.1.1.1
Secondary:  1.0.0.1

Benefits:

⚡ Very fast global DNS network
🔒 Privacy focused (no logging)
🌏 Works well in the Philippines

📱 Option 1 — Use the 1.1.1.1 App (Easiest)

Android
Download on Google Play

iOS
Download on App Store

Steps:

Install the app
Toggle 1.1.1.1 ON
(Optional) Enable WARP for extra privacy & speed

💻 Option 2 — Windows Manual Setup

Open Control Panel → Network and Internet → Network and Sharing Center
Click your connection → Properties
Select Internet Protocol Version 4 (TCP/IPv4) → Properties

Enter DNS:

Preferred DNS: 1.1.1.1
Alternate DNS: 1.0.0.1

Click OK
Flush DNS cache (run in Command Prompt as Administrator):
```
ipconfig /flushdns
```

🍎 macOS Setup

Go to System Settings → Network
Select your connection → Details… → DNS
Add:
```
1.1.1.1
1.0.0.1
```

Flush cache (Terminal):

sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

🤖 Android Manual Setup (Wi-Fi)

Settings → Network & internet → Wi-Fi
Tap your network → Edit (pencil icon) → Advanced
Set IP settings to Static
Scroll down and enter:
```
DNS 1: 1.1.1.1
DNS 2: 1.0.0.1
```
Save

🍏 iOS Setup (Wi-Fi)

Settings → Wi-Fi
Tap the (i) next to your network
Scroll to Configure DNS → Manual
Add:
```
1.1.1.1
1.0.0.1
```

✅ Verify DNS

Open: https://1.1.1.1/help

You should see:

Using DNS over HTTPS (DoH): Yes
Using 1.1.1.1: Yes

Then test the previously blocked site, e.g.
https://trailblazerph.vercel.app

🧰 Troubleshooting

If the site is still blocked:

Possible causes:

ISP Deep Packet Inspection (DPI)
Network firewall / router filtering
Old DNS cache still active

Solutions:

Restart your device and router
Clear browser cache & cookies
Enable Cloudflare WARP in the 1.1.1.1 app
Use a full VPN as a last resort

📘 Educational Use

This repository explains how DNS infrastructure works and how users can select alternative DNS providers.
It is intended for educational purposes only.

📅 Last Updated

March 2026

Made with ❤️ for users in the Philippines facing ISP blocks