No Access To Certain WEB Sites Using CentOS 6.5

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HW:
Lenovo T520 laptop with MS WIN 7
OR
dedicated PC (DELL GX 280)

SW:
CentOS 6.5 (64-bit) installed using VMware Player on MS WIN 7 host CASE A) — BRIDGED networking selected CASE B) — NAT networking
OR
CentOS 6.5 i(32-bit) nstalled on real HW (DELL OptiPlex GX 280)

___issue____ at hand:

The default Firefox ESR browser (17.0.10) does not find many web pages. regardless of the system (virtual – bridged or NAT OR real HW)

For example:
https://www.google.com/ works When I enter into search field string ‘opera browser’
https://www.google.com/search?q=opera+browser&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:unofficial&client=firefox-a

I do get a lot of results back. So far so good.

Then I click on the first searched link http://www.opera.com/
I get back

Server not found
Firefox can’t find the server at www.opera.com

Then I open gnome-terminal and type ping www.opera.com

I get back __nothing__

[igor@localhost ~]$ ping www.opera.com PING www.route53.opera.com (54.244.236.138) 56(84) bytes of data.

but

when I type

ping opera.com

I get back

[igor@localhost ~]$ ping opera.com PING opera.com (185.26.182.79) 56(84) bytes of data.
64 bytes from front-ams.opera.com (185.26.182.79): icmp_seq=1 ttlA time4 ms
64 bytes from front-ams.opera.com (185.26.182.79): icmp_seq=2 ttlA time2 ms

=======================another example
=======================http://www.delo.si/ works http://www.dnevnik.si does __not__ work

http://www.CentOS.org/ works but when I click on the link Special Interest Group on the same page http://wiki.CentOS.org/SpecialInterestGroup , the link does NOT work. I get back

Server not found
Firefox can’t find the server at www.opera.com.

:::important:::
All the examples from above work flawlessly on the MS WIN 7 on the same laptop, the same ETHERNET cable connected to the same switch hub with the same router at the same time.
[Reminder: CentOS 6.5 runs on VMWare on WIN 7]

Any hint, FAQ, pointer to RTFM is more than welcome

I am puzzled, please help

5 thoughts on - No Access To Certain WEB Sites Using CentOS 6.5

  • You aren’t running with anything near the latest Firefox packages. The version of Firefox ESR that is provided is version 31.3.0. Before even trying to debug these things, you should try updating to the recent version. There are many security holes in the version you are running, as well. I have to wonder what other packages are out of date, such as openssl.

    Your pings against http://www.opera.com and opera.com aren’t unusual. Not all hosts respond to pings. I can confirm that behavior on my systems.

    I suggest keeping your system up to date before trying to track down whatever problems you’re having.

  • I was able to remove firefox from the equation and reproduce the problem using curl

    NON working URL

    [igor@localhost ~]$ ping http://www.iquaid.org PING http://www.iquaid.org (208.97.177.112) 56(84) bytes of data.
    64 bytes from apache2-ogle.welchs.dreamhost.com (208.97.177.112):
    icmp_seq=1 ttl@ timeD.4 ms
    64 bytes from apache2-ogle.welchs.dreamhost.com (208.97.177.112):
    icmp_seq=2 ttl@ timeD.9 ms
    64 bytes from apache2-ogle.welchs.dreamhost.com (208.97.177.112):
    icmp_seq=3 ttl@ timeD.9 ms
    ^C
    — http://www.iquaid.org ping statistics –

  • are you sure that DNS is working correctly on the VM? e.g. what’s in etc/resolv.conf? are you using NAT or a bridged network device? is there anything weird in the output of netstat -nr? are you using anything to proxy traffic? is there anything in iptables that could be blocking traffic?