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Managing SPF and reverse DNS in Exchange Server (Part 1)
Network Diagnostics throws up the following error message: An authoritative server indicates its status of supplying definitive answers, deemed authoritative , by setting a protocol flag, called the " Authoritative Answer " AA bit in its responses. Now type the IP address of your conditional forwarder into the dotted box and click Add to add it to the selected domain's forwarders list:. Thank you for sharing this information. Mockapetris instead created the Domain Name System. Reliable DNS servers include the following: Not Helpful 8 Helpful 6.

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I voted for this because the third approach is by far the simplest way to do this. Configuring NetworkManager connections using the NetworkManager connection editor only has any effect if NetworkManager is used. If you want it to come first then one of the other options is more appropriate.

It sounds like you are talking about the resolvconf package. Install the resolvconf package. Azendale 8, 7 38 The information about the file warning is just what I needed. I was under the impression that I shouldn't edit the file! The loopback network interface auto lo iface lo inet loopback The primary network interface auto eth0 iface eth0 inet static address Joseph Mituzas 2 2.

This has become my favorite method as well. All you really need are 'address', 'netmask' and 'gateway'. This is the cleanest answer. Misspelled "dns-nameservers" was my actual problem. Peter Mortensen 1, 2 10 Don Chai 1 2. Jase 3 9. Does this work if you don't have any addresses assigned by DHCP?

If you want to learn more about the dhclient configuration you can do a man dhclient. This is not a response to Azendale's question. This answer is completely wrong. First of all, the question submitter wants to add the address of an external namserver, not the address The interface configurer for an external interface is not the place to add an address for an internal nameserver.

Third, since Ubuntu First of all -- the original question was dramatically changed by moderator merging, so my answer of course looks strange. The dhcp3 file was the location when I answered this in , and even if it's not ideal, it worked. I've used this solution on multiple machines. Obviously, you would change the loopback address to the one you want to prepend. I assume most people know what a loopback is, even if they haven't read RFC Personally, I was not familiar with the bsd-ish resolvconf way of doing things.

Mark 61 1 1. As resolvconf is part of the base system, by deleting it you are asking for trouble in the future, at upgrade time. I agree with both the comment and the answer: The information resolvconf does use from the NetworkManager was present: The culprit was a file not removed with the deinstallation of dnsmasq: Anne van Rossum 4 5.

Thank you, this was very helpful. I tried the higher voted answers first and none seemed do do the trick. Your answer helped resolve this issue for me. Frank Barcenas 1, 3 13 Yes, I am not a fan of this kind of change which affects servers, adds complexity and opacity. This is core behavior that shouldn't change from release to release.

Dan B 11 2. That did the solution for me. Adige72 30 2 7. Adding my bit to the already long list, here's another way tested on Izzy 2, 4 18 For more information, see interfaces 5. Roy Rogers 11 1. Steven Collins 13 2. Vriens May 31 '16 at Another way is to define docker specific dns servers at: Sign up or log in Sign up using Google.

Sign up using Facebook. Sign up using Email and Password. Click OK and the new domain appears in the top listbox make sure it is selected for the next step:. Now type the IP address of your conditional forwarder into the dotted box and click Add to add it to the selected domain's forwarders list:.

Click OK to apply the change and close the properties sheet and you're done. Now any name queries for the google. When might you want to use conditional forwarding in the real world? I can think of several situations where it might be useful:.

Finally, is there anything you need to watch out for regarding using conditional forwarding? Two things come to mind First, conditional forwarding is suitable if you are dealing with a fixed DNS infrastructure.

That means in a merger or supply-chain scenario you must be sure the other company doesn't plan on changing their DNS infrastructure by decommissioning old name servers, deploying new ones, or changing the IP addresses of existing ones. If they do change their infrastructure and don't inform you of this, then your name server may suddenly find itself forwarding queries to non-existing name servers resulting in failed name queries and frustrated users flooding help desk with calls.

In that case, it might be better to create stub zones on your name servers for zones for which the other company's name servers are authoritative. That's because stub zones automatically update themselves with the current list of name servers in the zone while configuring forwarders is a process that has to be done manually.

Same thing in a large enterprise that has a complex Active Directory forest--if you aren't sure that administrators in other divisions of your company are going to tell you in advance when they change their DNS infrastructures, don't implement conditional forwarding--use stub zones instead.

The second caveat concerning conditional forwarding is not to get to carried away implementing it. You might think you could improve name resolution for your users by adding dozens of forwarders for the most popular Internet sites they use for work purposes, but this might be a bad idea.

The reason is, when you have a long list of conditional forwarders configured, your name server has to go through the entire list until it either finds the domain requested or fails to find it, in which case standard forwarding is used if configured , after which root hints is tried and standard recursion employed.

The result of this is that your name server has to perform extra processing to go through the forwarders list each time a query is received, and in addition to increasing the CPU load on your server this can also result in slower name resolution rather than faster due to the time it takes to process an especially long list.

And if the forwarder itself is also part of your own company's DNS infrastructure then be aware that the added load of receiving forwarded queries from other name servers and performing recursive queries to resolve them means your forwarders will experience especially heavy CPU utilization and may need to have their hardware beefed up considerably to handle it.

So if you do plan on using conditional forwarding, particularly within your own enterprise, be sure to use it only where it really makes a difference and use it sparingly. Mitch Tulloch is a widely recognized expert on Windows Server and cloud technologies who has written more than a thousand articles and has authored or been series editor for over 50 books for Microsoft Press.

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I have a user on Windows 7 that is trying to access a local server with a DNS name of loominggu.ga We have two internal DNS servers. The DHCP server assigns users the two internal DNS servers as primary and secondary and then our ISPs DNS as a tertiary DNS server. Sep 10,  · Hi sallyh75, That seems to be a strange behavior. Let us try the following methods and check. Method 1. Let us reset the TCP/IP and verify. To reset the TCP/IP stack go to this article and follow the instructions. loominggu.ga is the best tool to perform a DNS Health and DNS Propagation check. Our DNS Check will run a complete DNS Report for the specified domains and analize the common records like A, MX, NS, CNAME, TXT and much more.