Weird WiFi Connection Problem

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SirDarknight

Distinguished
Jun 5, 2013
116
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I think it's quite a weird problem : I've a desktop in my house which is connected to the router by LAN and I've a laptop,a smartphone which are connected to the router by WiFi. This morning, when I tried to Google something from my laptop, Firefox showed me -

34202d1440694234-connection-problems-through-wifi-2011-10-08-21-24-06-77ca70.jpg


This not just happened with Google but with any other site and it also happened with my smartphone. But the funny part is that the downloads were just fine with torrent and IDM. Only I couldn't surf the net.

Note : The problem didn't occur with my desktop at all.With my laptop and smartphone, It automatically fixed a few hours later and happened again after a while.
 
Solution
Solandri
Depends where the problem is occurring. If it's your router, then hopefully a firmware update fixes the issue. Otherwise install DD-WRT on it (if it's supported), or replace it.

If it's your ISP's DNS which is flaky, try setting the DNS servers in your router to 8.8.8.8 and 8.8.4.4 - those are Google's. Or you could use OpenDNS - 208.67.222.220 and 208.67.220.222. OpenDNS offers other features like filtering porn and known malware websites, which can be handy if you have kids. (Any kid smart enough to change their computer's DNS server can bypass it, but it'll work for most kids.)

I'd suggest not using your ISP's DNS anyway because the vast majority of them try to monetize your typos. That is, if you type a URL wrong and the...
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Solandri

Solandri

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Jan 4, 2012
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Your pic doesn't show up, but what you're describing sounds like a DNS issue. Computers don't care about domain names like google.com. They only care about IP addresses. Domain names are only used to make life easier for humans. DNS is what translates google.com into the actual IP address. Your computer asks the DNS sever "what's the IP address for google.com?" And the server sends it the IP address.

If a DNS server goes down or is misconfigured, the results can be a little baffling because DNS requests are cached. That is, once your computer gets the IP address for google.com, next time it needs it, it doesn't ask the DNS server again. It re-uses the previous result (as long as it's not too old). This is why when a DNS server goes down, your browser will work on some computers but not others, or with some sites but not others.

Torrents are done directly via IP address. Downloads from web sites only need to do a DNS query at the beginning. Once the download is in progress, it doesn't matter if the DNS server goes down.
 
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Solandri

Solandri

Illustrious
Jan 4, 2012
4,919
98
39,240
Depends where the problem is occurring. If it's your router, then hopefully a firmware update fixes the issue. Otherwise install DD-WRT on it (if it's supported), or replace it.

If it's your ISP's DNS which is flaky, try setting the DNS servers in your router to 8.8.8.8 and 8.8.4.4 - those are Google's. Or you could use OpenDNS - 208.67.222.220 and 208.67.220.222. OpenDNS offers other features like filtering porn and known malware websites, which can be handy if you have kids. (Any kid smart enough to change their computer's DNS server can bypass it, but it'll work for most kids.)

I'd suggest not using your ISP's DNS anyway because the vast majority of them try to monetize your typos. That is, if you type a URL wrong and the domain doesn't exist, your ISP tries to send you to a landing page with ads, hoping you'll click on it and make them some money. Google and OpenDNS correctly return a no such site error message.
 
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