Default DNS server unknown its coming while resolving`

Hi
i have windows 2012 domain controllers, able to successfully resolve dns queries.
But the problem is while resolving default server field its coming unknown. i created reverse lookup for dns server(Domain controller) after that host name is coming..
But after one day again hostname disappeared, default server field unknown coming..
If anybody knows this issue..

Hi,
Have you checked if the reverse lookup record is still present in the reverse lookup zone. Domain Controllers use dynamic registration to register A/PTR records for itself. Make sure Enterprise Domain Controllers group has permissions over the records so
these can be updated. This is found in on the security tab at the record/zone propetties. If you manually created the PTR record then it should have no timestamp therefore it will not be scavanged in case you enabled that function.
Hope this helps.
Regards,
Calin

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DNS server unknown

I am trying to get wireless connection to my Toshiba Satellite C655-S5132. However, the company router for NetGear is not allowing me to connect to the internet. The CD that came with the router, is irritating. It needs the IP Address, the IP Mask, the Gateway Server and the DNS, however, when I pull up the configuration for these things, it comes up as
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This is one of those topics that is well beyond this forum but let me try. Beyond the router, you also need an ISP (Internet Service Provider) like AT&T, Cox, or the local phone company. The ISP provides a cable modem which then connects to the router. The router then connects either with a wire or wirelessly to the computers that are trying to connect to the Internet. Just having a router won't get your computer to the Internet. You need the ISP to provide the Public IP address, the DNS Server and the gateway to the Internet. DNS stands for Domain Name Services and it is what converts a website like Yahoo.com into an IP address like 123.5.173.9. From your questions and the nature of the problems you're having, I would suspect that you don't have an ISP or that the router is not connected correctly to the cable modem.

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Hi,
I'm a new BT broadband customer.
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The basic first line of defence is obviously to have dns filtering.
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   But users can override the dns setting on each device!
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Changing the default dns server

I have edited the file /etc/resolv.conf and added the nameserver of the google public dns. How can i verify if google dns are used?

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Also, once you've edited resolv.conf then a reboot may overwrite your settings.
Put:
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nameserver 8.8.4.4
In it for Google DNS, THEN:
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Last edited by headkase (2013-02-01 17:41:22)

Default DNS server IP addresses

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Hi All,
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I would agree with Christopher.
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resolution.
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This posting is provided AS IS with no warranties or guarantees , and confers no rights.
Ahmed MALEK
My Website Link
My Linkedin Profile
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Osx lion dns server, forward certain domain searches to other dns server

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**Are your clients using DHCP? Are you sure you've eliminated the dependancies on that IP address for all your clients?
- Chris Ream -
**Remember, if you find a post that is helpful, or is the answer, please mark it appropriately.**

An unknown error occurred while validating the server dns

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This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.
Microsoft
Student Partner
Microsoft Certified Professional
Microsoft Certified Systems Administrator: Security
Microsoft Certified Systems Engineer: Security
Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration
Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration

Resolving arabic domain name in Solaris DNS server

Hi..
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Sorry my bad.... slight mistake in my question...Here is my corercted query--
After successfully connecting to the internet, when I do NSLOOKUP on the DC, the DNS doesnt resolve my internal domain/site but instead resolves external sites on the internet.
My computer FQDN is nri.wwe.com
Domain dns name is wwe.com
The above should get resolve internally but it searches on the internet.
This is how it should work
& it works perfect when I disable the other NAT network adapter (i.e. disable internet connectivity on my virtual DC)
C:\>nslookup nri.wwe.com
Server: nri.wwe.com
Address: 192.168.1.11
Name:    nri.wwe.com
Address: 192.168.1.11
But when I again enable internet connectivity, this it what happens.
C:\nslookup www.wwe.com
DNS request timed out.
    timeout was 2 seconds.
Server: UnKnown
Address: 192.168.12.2
DNS request timed out.
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Non-authoritative answer:
DNS request timed out.
    timeout was 2 seconds.
Name:    www.wwe.com.nsatc.net
Address: 64.152.0.124
Aliases: www.wwe.com
And when I again nslookup, this is what I get,
C:\>nslookup www.wwe.com
DNS request timed out.
    timeout was 2 seconds.
Server: UnKnown
Address: 192.168.12.2
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
*** Request to UnKnown timed-out
Now this 192.168.12.2 is VM assigned DNS via VM Natting with its own DHCP. If we do it manually, none of the virtual machines can connect to the internet. So I cannot fiddle with it anymore as I have already that as well.

Dnsmasq sends out its own ip as dns-server dhcp option

Hi,
i have a gateway / dns server on 192.168.1.1
I have a dhcp server on 192.168.1.2 (dnsmasq)
I configured dnsmasq to look into /etc/resolv.conf (well, that's actually default behavior) and use that to specify dns server when replying to client dhcp requests.
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# cat /etc/resolv.conf
nameserver 192.168.1.1
#nameserver 127.0.0.1
#nameserver 212.71.0.33
# edpnet
nameserver 212.71.0.33
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192.168.1.3 q700
192.168.1.5 dieter-ws
192.168.1.6 dieter-dellD620-arch
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192.168.1.10 BRN_0441B3 hl5250
178.79.146.162 dieter-linode1
# End of file
here's what I see in /var/log/daemon.log, when I start dnsmasq and do a dhcp request.
Note the discrepancy between what it says as "using nameserver" and what it actually tells clients.
Feb 12 18:10:50 dieter-p4sci-arch dnsmasq[2168]: started, version 2.55 cachesize 150
Feb 12 18:10:50 dieter-p4sci-arch dnsmasq[2168]: compile time options: IPv6 GNU-getopt no-DBus no-I18N DHCP TFTP
Feb 12 18:10:50 dieter-p4sci-arch dnsmasq-dhcp[2168]: DHCP, IP range 192.168.1.5 -- 192.168.1.255, lease time 12h
Feb 12 18:10:50 dieter-p4sci-arch dnsmasq[2168]: reading /etc/resolv.conf
Feb 12 18:10:50 dieter-p4sci-arch dnsmasq[2168]: using nameserver 212.71.0.33#53
Feb 12 18:10:50 dieter-p4sci-arch dnsmasq[2168]: using nameserver 192.168.1.1#53
Feb 12 18:10:50 dieter-p4sci-arch dnsmasq[2168]: read /etc/hosts - 10 addresses
Feb 12 18:10:56 dieter-p4sci-arch dnsmasq-dhcp[2168]: 2764941049 available DHCP range: 192.168.1.5 -- 192.168.1.255
Feb 12 18:10:56 dieter-p4sci-arch dnsmasq-dhcp[2168]: 2764941049 DHCPRELEASE(eth0) 192.168.1.5 80:ee:73:09:fa:94
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 available DHCP range: 192.168.1.5 -- 192.168.1.255
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 client provides name: dieter-ws
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 vendor class: dhcpcd-5.2.10:Linux-2.6.37-ARCH:i686:GenuineIntel
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 DHCPDISCOVER(eth0) 80:ee:73:09:fa:94
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 DHCPOFFER(eth0) 192.168.1.5 80:ee:73:09:fa:94
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 requested options: 1:netmask, 121:classless-static-route, 33:static-route,
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 requested options: 3:router, 6:dns-server, 12:hostname, 15:domain-name,
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 requested options: 26:mtu, 28:broadcast, 42:ntp-server, 51:lease-time,
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 requested options: 54:server-identifier, 58:T1, 59:T2, 119:domain-search
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 tags: known, eth0
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 next server: 192.168.1.2
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 1 option: 53:message-type 02
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 54:server-identifier 192.168.1.2
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 51:lease-time 00:00:a8:c0
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 58:T1 00:00:54:60
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 59:T2 00:00:93:a8
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 1:netmask 255.255.255.0
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 28:broadcast 192.168.1.255
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 6:dns-server 192.168.1.2
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 3:router 192.168.1.1
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 available DHCP range: 192.168.1.5 -- 192.168.1.255
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 client provides name: dieter-ws
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 vendor class: dhcpcd-5.2.10:Linux-2.6.37-ARCH:i686:GenuineIntel
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 DHCPREQUEST(eth0) 192.168.1.5 80:ee:73:09:fa:94
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 DHCPACK(eth0) 192.168.1.5 80:ee:73:09:fa:94 dieter-ws
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 requested options: 1:netmask, 121:classless-static-route, 33:static-route,
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 requested options: 3:router, 6:dns-server, 12:hostname, 15:domain-name,
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 requested options: 26:mtu, 28:broadcast, 42:ntp-server, 51:lease-time,
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 requested options: 54:server-identifier, 58:T1, 59:T2, 119:domain-search
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 tags: known, eth0
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 next server: 192.168.1.2
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 1 option: 53:message-type 05
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 54:server-identifier 192.168.1.2
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 51:lease-time 00:00:a8:c0
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 58:T1 00:00:54:60
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 59:T2 00:00:93:a8
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 1:netmask 255.255.255.0
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 28:broadcast 192.168.1.255
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 6:dns-server 192.168.1.2
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 9 option: 12:hostname dieter-ws
Feb 12 18:11:00 dieter-p4sci-arch dnsmasq-dhcp[2168]: 3497735943 sent size: 4 option: 3:router 192.168.1.1

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MCP/MCSA/MCTS/MCITP

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DNS Server does not resolve new generic Top Level Domain names- CNR configuration issue?

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Hi Constantinos,
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