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Ahmed

Wi-Fi DNS Issue — Mobile Data par Site Working

Case 2 — Wi-Fi par website nahi, mobile data par chal rahi thi

Section titled “Case 2 — Wi-Fi par website nahi, mobile data par chal rahi thi”

Status: Resolved (laptop par dobara working confirm hui)
Date: 7 November 2026
Host: ahmed.digitalstudio.ltd

Symptoms

Section titled “Symptoms”
  • Laptop par Wi-Fi se website nahi khul rahi thi.
  • Phone par bhi usi Wi-Fi se site nahi khul rahi thi.
  • Phone ka Wi-Fi band karke mobile data se website khul rahi thi.
  • Baad mein laptop se bhi website chalne lagi.

Is pattern se pata chalta hai ke website completely down nahi thi. Dono Wi-Fi devices ka common factor router/ISP path ya shared DNS resolver ho sakta tha.

Technical checks

Section titled “Technical checks”
  1. Cloudflare Custom Domain aur Worker mapping enabled aur sahi thi.
  2. Authoritative nameservers ne correct records return kiye.
  3. Public DNS 1.1.1.1, 8.8.8.8, 9.9.9.9 aur doosre resolvers ne baad mein records consistently resolve kiye.
  4. Different server connections se HTTPS 200 aur valid SSL mila.
  5. User ne confirm kiya ke laptop par bhi website dobara chal rahi hai.

Root-cause assessment

Section titled “Root-cause assessment”

Likely: Wi-Fi network ka router/ISP recursive DNS stale negative cache use kar raha tha, ya local DNS update hone mein delay tha.

Not proven: Failing waqt router ka exact DNS server aur uska packet-level NXDOMAIN response record nahi hua. Is liye kisi ek ISP/router setting ko final confirmed root cause nahi keh sakte.

Resolution

Section titled “Resolution”

Website ka public DNS consistently available ho gaya aur access recover ho gaya. Is dafa router reset, tunnel reconfiguration ya Cloudflare DNS record replacement ki zaroorat nahi padi.

Agar issue dobara aaye

Section titled “Agar issue dobara aaye”

Windows laptop

Section titled “Windows laptop”
Terminal window
nslookup ahmed.digitalstudio.ltd
nslookup ahmed.digitalstudio.ltd 1.1.1.1
ipconfig /flushdns

Linux laptop

Section titled “Linux laptop”
Terminal window
resolvectl query ahmed.digitalstudio.ltd
dig @1.1.1.1 ahmed.digitalstudio.ltd A
sudo resolvectl flush-caches

resolvectl sirf tab use karein jab systemd-resolved available ho.

Android phone

Section titled “Android phone”

Mobile data aur Wi-Fi ko separately test karein. Agar sirf Wi-Fi fail kare, phone ka Wi-Fi reconnect karein aur router par configured DNS check karein. Agar router ka DNS baar baar stale results de, to router administrator se 1.1.1.1 ya 8.8.8.8 jaise reliable recursive DNS par switch karwa sakte hain. Bina zaroorat router configuration na badlein.

Router/ISP ko isolate karne ka test

Section titled “Router/ISP ko isolate karne ka test”

Default DNS aur public DNS ko compare karein. Agar default resolver NXDOMAIN de aur public 1.1.1.1 correct A record de, to issue Wi-Fi network ke DNS path mein hai. Agar dono correct hain magar HTTPS fail hai, DNS ki bajaye IPv6/routing/firewall/TLS check karein.

Working URLs

Section titled “Working URLs”

Natija: Website ab laptop par bhi working confirm hui. Root-cause hypothesis documented hai, lekin unavailable router logs ko fabricated evidence nahi banaya gaya.