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Unregularly cant reach certain websites

asked 2015-01-03 11:02:59 -0500

AnoniMouse gravatar image

updated 2015-04-13 11:50:24 -0500

mether gravatar image


I've got a strange problem: Sometimes I can't connect to certain webistes (one of the one of my mail providers), neither through Chromium, Firefox, Thunderbird or via pinging them. Often this can be resolved via a reboot.

I've searched already, but all the proposed solutions didn't work for me :-(

Can you help me?

fedora 20 Xfce x86 wireless: iwl3945ABG (module loaded, driver loaded)

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FYI, if you are commenting on an answer, there is an "Add a comment" button under the answer.

randomuser gravatar imagerandomuser ( 2015-01-03 12:34:08 -0500 )edit

I know, but the answer wasn't displayed, yet. So I decided to comment on my question as long the answer isn't available yet (I copied the text from the mail I've got)

AnoniMouse gravatar imageAnoniMouse ( 2015-01-03 13:42:30 -0500 )edit

Also check your system time and date. If it's too far wrong, SSL won't work.

randomuser gravatar imagerandomuser ( 2015-01-03 16:17:59 -0500 )edit

This has occurred for me ever since upgrading to Fedora 20. If it is a DNS issue, it is a really odd one: is not known for minutes at a time then it begins working for perhaps an hour. During that outage other sites work just fine: local news stations, , , , etc. Other temporarily affected sites are and .

wallyk gravatar imagewallyk ( 2015-01-04 11:11:17 -0500 )edit

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answered 2015-01-03 11:49:25 -0500

arehtykitna gravatar image

This seems like a DNS server issue. I would recommend changing the DNS servers in your network configuration so that your computer uses an alternative to your ISP's default.

Open DNS - and/or

Google DNS - and/or

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okay if that made no difference, another thing to try is disabling IPv6. Sometimes that can make a difference.

arehtykitna gravatar imagearehtykitna ( 2015-01-03 13:17:06 -0500 )edit

Hm, just tried opening the url on my other PC (ArchLinux) and this works flawlessly. That seems not to be a DNS issue :/

AnoniMouse gravatar imageAnoniMouse ( 2015-01-03 13:39:42 -0500 )edit

@AnoniMouse - it would be a more reliable test to try the suggestion, and report about the result.

randomuser gravatar imagerandomuser ( 2015-01-03 14:14:19 -0500 )edit

I just wasn't on the PC yet. Good news: It seems to work. I hope it continues to be like that and isn't just working by chance ^^. Thanks, I will report after more time of testing.

AnoniMouse gravatar imageAnoniMouse ( 2015-01-03 15:13:51 -0500 )edit

Yeah, the good behavior of your Arch Linux system doesn't mean your Fedora system's DNS relationship is correctly configured. To determine easily if it's DNS or not, just wait until you cannot access the desired service and then attempt to perform nslookup hostname (where hostname is, of course, the domain name used to access the service). If it's a DNS issue, the output will inform you that the hostname cannot be found. If the hostname CAN be resolved, then you should perform mtr hostname and see if you can determine where the networking failure is occurring.

bitwiseoperator gravatar imagebitwiseoperator ( 2015-01-03 16:01:05 -0500 )edit

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Asked: 2015-01-03 11:02:59 -0500

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Last updated: Jan 03 '15