Could Not Resolve Host github.com

Question

Though I have the same problem that is in this question, But I am facing another problem i.e, even https://github.com/ is not running in the browser and showing that this webpage is not available and this happens after I installed Heroku.

Cannot access github from terminal and not even from browser.

After diagnosis I get to know that this problem is related to my WiFi because when I try to open https://github.com/ in mobile using mobile data, It is opening but when I connect my mobile to WiFi then same problem i.e, this webpage is not available and when I use mobile data internet in my laptop I am able to access the site but when using WiFi this webpage is not available.

I am running Ubuntu(Linux), dual boot with Windows-7

Diagnosis Results:

@Aroll605

PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=57 time=144 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=57 time=71.4 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=57 time=192 ms
64 bytes from 8.8.8.8: icmp_seq=4 ttl=57 time=112 ms
64 bytes from 8.8.8.8: icmp_seq=5 ttl=57 time=137 ms
64 bytes from 8.8.8.8: icmp_seq=6 ttl=57 time=58.0 ms
64 bytes from 8.8.8.8: icmp_seq=7 ttl=57 time=83.6 ms
64 bytes from 8.8.8.8: icmp_seq=8 ttl=57 time=104 ms
64 bytes from 8.8.8.8: icmp_seq=9 ttl=57 time=128 ms

@epascarello

unknown host 192.30.252.131

Please stop inventing your own formatting. `backtickets` are for inline code, not for highlighting URLs, and you don't need to **bold** your URLs. — user229044, Dec 31 '14 at 07:04
Has nothing to do with programming, You need to figure out why a website is blocked on your machine. — epascarello, Dec 31 '14 at 07:05
Run a basic diagnostic test on your WiFi. 'ping 8.8.8.8' -- if it works, you got a DNS problem. If not, you are not connected to the internet at all. Ping your router, and if there is no response, there is your problem. — Aroll605, Dec 31 '14 at 07:06
@epascarello Yes on my machine with particular connection(WiFi), but have no idea how to figure out. — Varun Chakervarti, Dec 31 '14 at 07:06
@Aroll605 I have also checked my /etc/hosts file but there is no such entry. — Varun Chakervarti, Dec 31 '14 at 07:07
@Aroll605 I will run this but currently I am not carrying machine with me. I will run this as soon as I will reach home. Many Thanks. Will post the output. — Varun Chakervarti, Dec 31 '14 at 07:41
@epascarello I will hit the IP but currently I am not carrying machine with me. I will run this as soon as I will reach home. Many Thanks. — Varun Chakervarti, Dec 31 '14 at 07:41
@epascarello but who's IP(192.30.252.131) is this that you have given ?? — Varun Chakervarti, Dec 31 '14 at 07:44
This definately looks like a DNS issue, you can access sites via IP but not through the URL. Not programming related like someone else has already said. But It looks like you need to get into your router and setup your DNS servers IP, I would recommend setting to Google's DNS servers 8.8.8.8 and 8.8.4.4. — Scriptable, Dec 31 '14 at 12:01
Great, Glad to of helped. I'll add an answer below so that you can mark this question answered. — Scriptable, Dec 31 '14 at 12:28
@Scriptable Now I am using google DNS server address , but previously it was automatically detected, will it affect anything. — Varun Chakervarti, Dec 31 '14 at 12:30
no, it should not cause you any issues, I generally use Google's and find it to be much faster than my ISP's — Scriptable, Dec 31 '14 at 12:31
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/67980/discussion-between-veer-and-scriptable). — Varun Chakervarti, Dec 31 '14 at 12:32
[Indian Government Orders 32 Web Sites Blocked, Including GitHub, Archive.Org, Pastebin, DailyMotion And Vimeo](https://www.techdirt.com/articles/20141231/02075529554/indian-government-orders-32-web-sites-blocked-including-github-archiveorg-pastebin-dailymotion-vimeo.shtml) — epascarello, Jan 01 '15 at 04:58

score 6 · Accepted Answer · answered Dec 31 '14 at 12:30

6

This definately looks like a DNS issue, you can access sites via IP but not through the URL.

You need to configure your routers DNS settings, personally I would set them to Google's DNS servers

8.8.8.8 (primary)
8.8.4.4 (secondary)

answered Dec 31 '14 at 12:30

Scriptable

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Could Not Resolve Host github.com

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