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Dns issue


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#1 Cubsfan80

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Posted 06 November 2016 - 08:51 PM

Have a small network with a Cisco rvs4000 router. Everything works fine except I'm not getting the throughput I want so I'm replacing it with a Cisco rv320. When I swap out the router my internal dns server stops working and nobody can get internet access. I have forwarders setup to open dns but when I look at them in dns manager it says it can't resolve. Also if I go to any client machine and change the Dns servers to 8.8.8.8 the internet works perfectly. Any ideas on what I might be missing? Like I said dns works perfectly with the old router.

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#2 Kilroy

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Posted 08 November 2016 - 01:42 PM

Welcome to Bleeping computer.

 

What is the DNS server the clients are getting via DHCP?  (I mean to have you actually see what they are getting, not what you want them to get)



#3 Wand3r3r

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Posted 08 November 2016 - 03:40 PM

using  208.67.222.222 and 208.67.220.220 for dns?

 

if you do the following at the server do you get the same results?

 

Via a cmd prompt

C:\Users\Charlie>nslookup google.com 208.67.222.222

Server:  resolver1.opendns.com
Address:  208.67.222.222

Non-authoritative answer:
Name:    google.com
Addresses:  2607:f8b0:400a:808::200e
          172.217.3.174

 


Edited by Wand3r3r, 08 November 2016 - 03:42 PM.


#4 Cubsfan80

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Posted 08 November 2016 - 10:35 PM

They are getting the internal dns server IP address. Do you think it would work if I set dns servers in dhcp to the internal dns server and then put opendns address in as well?

Edited by Cubsfan80, 08 November 2016 - 10:36 PM.


#5 Wand3r3r

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Posted 09 November 2016 - 12:56 AM

Usually you configure the dns forwarders to point to internet dns [opendns].  this way local clients registered in dns can be resolved locally and anything else gets sent to the forwarders



#6 Cubsfan80

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Posted 09 November 2016 - 07:33 PM

I have the forwarders setup. I got everything to work by disabling the firewall on the router.

#7 Wand3r3r

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Posted 10 November 2016 - 10:05 AM

You should reenable the firewall but configure it to allow opendns






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