topic Re: Site Inaccessable while using OpenDNS in OpenDNS

Site Inaccessable while using OpenDNS

jdsmith14 — Tue, 10 Jan 2017 11:16:07 GMT

I am trying to access this site while using OpenDNS:

https//intranet.quintiles.com

Even when setting blocking to "None" the site remains inaccessible.

When reverting to non OpenDNS DNS servers, the site is accessible.

Any suggestions would be appreciated!

Re: Site Inaccessable while using OpenDNS

rotblitz — Tue, 10 Jan 2017 17:00:25 GMT

Did you mean https://intranet.quintiles.com/ ?

I cannot reproduce your problem.

Copy & paste the complete plain text output of the following diagnostic commands here when OpenDNS is being used:

nslookup -type=txt debug.opendns.com.
nslookup intranet.quintiles.com.

Re: Site Inaccessable while using OpenDNS

jdsmith14 — Wed, 11 Jan 2017 02:35:16 GMT

Correct on: "Did you mean https://intranet.quintiles.com/ ?"

Here is the output as requested:

nslookup -type=txt debug.opendns.com.
Server: resolver1.opendns.com
Address: 208.67.222.222

Non-authoritative answer:
debug.opendns.com text =

"server m11.jnb"
debug.opendns.com text =

"flags 20 0 8050 19500007E00400014C3"
debug.opendns.com text =

"originid 58234042"
debug.opendns.com text =

"actype 2"
debug.opendns.com text =

"bundle 9188782"
debug.opendns.com text =

"source 154.69.230.156:60924"

_______________________________________

nslookup intranet.quintiles.com.
Server: resolver1.opendns.com
Address: 208.67.222.222

DNS request timed out.
timeout was 2 seconds.
*** resolver1.opendns.com can't find intranet.quintiles.com.: Server failed

Thank you for the assistance!

Re: Site Inaccessable while using OpenDNS

rotblitz — Wed, 11 Jan 2017 13:16:16 GMT

I see now. The tool https://cachecheck.opendns.com/ returns SERVFAIL responses for some OpenDNS locations although I have refreshed the cache. Diving deeper, I can see that intranet.quintiles.com is an alias of the real name connect.gss.quintiles.com which has no A or AAAA record associated at their nameservers ns.rackspace.com and ns2.rackspace.com. Also, gss.quintiles.com has additional nameservers of usadc-ngsse11.quintiles.com and ieedc-ngsse11.quintiles.com which do not respond at all.

That said, the problem is with the authoritative DNS configuration of quintiles.com. You have to contact them to get it corrected.

You can help yourself as a temporary workaround while adding this entry to your local hosts file:

65.205.190.227 connect.gss.quintiles.com connect.quintiles.com intranet.quintiles.com

If this entry doesn't work, try the same with 62.17.37.134 and 65.205.190.117.

Re: Site Inaccessable while using OpenDNS

jdsmith14 — Thu, 12 Jan 2017 05:17:04 GMT

Thank you for the feedback and clarification - The problem turned out to be with the ISP's DNS servers, with several international sites not being available.

Again thank you for the detailed assistance.

Re: Site Inaccessable while using OpenDNS

rotblitz — Thu, 12 Jan 2017 15:42:31 GMT

"The problem turned out to be with the ISP's DNS servers"

If you're using your ISP's DNS service, not OpenDNS, then your thread has not to appear in this forum. If you used OpenDNS, then your ISP's DNS service is out of scope, and vice versa.