DNS Comparison: Cloudflare vs. Google vs. ISP DNS
DNS Comparison: Cloudflare vs. Google vs. ISP DNS
Summary
Choosing the right DNS provider can significantly improve your browsing speed, privacy, and ability to bypass local network issues. While your ISP provides a DNS by default, switching to a global provider like Cloudflare (1.1.1.1) or Google (8.8.8.8) is often a better choice for users in Bangladesh.
Comparison Table
| Feature | ISP Default DNS | Google DNS (8.8.8.8) | Cloudflare (1.1.1.1) |
|---|---|---|---|
| Speed (Local) | Very Fast (Dhaka) | Fast | Fastest (Dhaka PoP) |
| Privacy | Low (ISP monitors queries) | Medium | High (Logs deleted in 24h) |
| Reliability | Variable (often fails) | Very High | Very High |
| BDIX Support | Excellent | Limited | Limited |
Technical Deep-Dive
1. Cloudflare (1.1.1.1)
Cloudflare is currently the world’s fastest DNS. They have a Point of Presence (PoP) in Dhaka, meaning your queries are resolved locally rather than traveling to Singapore. They also support advanced privacy features like DoH and DoT.
2. Google DNS (8.8.8.8)
The most popular public DNS in the world. It is extremely reliable and has massive global capacity. In Bangladesh, it is often used as a fallback if the ISP’s DNS goes down.
3. ISP DNS
These are the servers owned by Link3, AmberIT, Carnival, etc. Because they are inside the ISP network, the “ping” to them is nearly zero. However, they are often used for DNS hijacking and regulatory blocking.
Bangladesh Context
- The BDIX Conflict: Global DNS providers (Google/Cloudflare) do not always know about the internal IP addresses of BDIX-only sites. If you use 1.1.1.1, you might find that some local “FTP movie servers” or “Live TV” portals provided by your ISP stop working.
- ISP Redirection: Many Bangladesh ISPs redirect “NXDOMAIN” responses (site not found) to their own search pages filled with ads. Switching to Cloudflare or Google removes these annoying redirects.
- Stability during Congestion: During peak hours, ISP DNS servers often become overloaded and slow to respond. Public DNS remains stable regardless of local ISP load.
Troubleshooting
- Local Sites Not Opening: If you switch to Google DNS and your ISP’s FTP server stops working, try setting your Primary DNS to 8.8.8.8 and your Secondary DNS to your ISP’s IP.
FAQ
Will changing DNS increase my download speed?
No. DNS only speeds up the “lookup” process (how long it takes to find the site). It does not increase your actual file download speed in Mbps.