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[I have posted the same issue on Ubuntu forums: . I am repeating it here to see if I can find an answer here.]

I installed Ubuntu 13.04 recently, and found that I can't connect to many sites, including Github, using Firefox(21.0) and Chrome(26.0.1410.63). I can visit all these sites on Windows, in all browsers.

Firefox continues to load the site, but doesn't show any contents. Chrome gives an error after a while:

Error 7 (net::ERR_TIMED_OUT): The operation timed out.

Some websites are loaded partially.

Some other sites with this issue: bitbucket(works on Chrome but not in Firefox), yahoo mail, 500px (partially loaded), images served from are not loaded.

I also can't clone (git clone) github repositories: I get "error: operation timed out". I can clone bitbucket repos.

In addition I noticed the following "SSL" issue while using "pip" to install Python packages; the packages do get installed. I am including this in here in case it is related to the above issue:

$ pip install ipython
Downloading/unpacking ipython
Could not fetch URL (from There was a problem confirming the ssl certificate: <urlopen error _ssl.c:489: The handshake operation timed out>
Will skip URL when looking for download links for ipython
Downloading ipython-0.13.2.tar.gz (6.0MB): 6.0MB downloaded
Running egg_info for package ipython

Installing collected packages: ipython
Running install for ipython

Installing ipcontroller script to /home/phn/.virtualenvs/default2.7/bin
Installing iptest script to /home/phn/.virtualenvs/default2.7/bin
Installing ipcluster script to /home/phn/.virtualenvs/default2.7/bin
Installing ipython script to /home/phn/.virtualenvs/default2.7/bin
Installing pycolor script to /home/phn/.virtualenvs/default2.7/bin
Installing iplogger script to /home/phn/.virtualenvs/default2.7/bin
Installing irunner script to /home/phn/.virtualenvs/default2.7/bin
Installing ipengine script to /home/phn/.virtualenvs/default2.7/bin
Successfully installed ipython
Cleaning up...

Note that I have none of these issues in Windows.

[Edit: May 17 2013]

Output from running curl on github:

[phn@phn ~ ]
$ curl -I
HTTP/1.1 301 Moved Permanently
Date: Fri, 17 May 2013 03:33:08 GMT
Content-Type: text/html
Content-Length: 178
Connection: close
Vary: Accept-Encoding

[phn@phn ~ ]
$ curl -I
curl: (35) Unknown SSL protocol error in connection to 

I hope someone can help me fix this.



share|improve this question
What is the output of ifconfig? – douggro May 16 '13 at 17:28
@douggro I have put it on pastebin: – Prasanth May 17 '13 at 3:19
My best guess at this point is a problem with your libnss3 libraries. These support the certificate authentication for SSL and HTTPS connections amongst other things. If you have Synaptic installed, it's pretty easy to search your 'Installed' packages to see if it's installed, and re-install if necessary. – douggro May 17 '13 at 8:14
@douggro I re-installed libnss3 and libnss3-1d, both of which were already installed, but it didn't solve the problem. Thanks though. – Prasanth May 17 '13 at 8:58
I'd keep searching in the lines of a problem with certificate handling as a possible cause. Failure to work with HTTPS requests certainly points that direction. – douggro May 17 '13 at 12:33

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