Internal dns not resolving

Join us now! Forgot Your Password? Forgot your Username? Haven't received registration validation E-mail? User Control Panel Log out. Forums Posts Latest Posts.

View More. Recent Blog Posts. Recent Photos. View More Photo Galleries.

Split Brain Dns - External & Internal Dns Configuration Exchange Server 2016 Part 2

Unread PMs. Forum Themes Elegant Mobile. Essentials Only Full Version. New Member. So, what would be the recommended practice to having both internal hostnames correctly resolved AND funnel all DNS traffic through Fortinet DNS service assuming there actually is a way to do this?

Expert Member. To make it short, I shamelessly cite from my recent post on stackexchange. Next, the record s. They are created in the config dns-entry section. Record type 'A' denotes a host entry. It doesn't harm to have an additional 'NS' record with the name of your nameserver, i. As you can see, it must be in 'recursive' mode or non-local names will not be resolved. If the requested hostname is not found in the dns-database, if 'recursive' is specified the request will be forwarded to the Fortigate's System DNS which can be a Fortiguard DNS like in your case or your provider's DNS.

Now you can resolve a local hostname like 'namea. If you want to continue to use your? There are pros and cons with the FGT nameserver. Contra: no dynamic DNS entries, reverse lookup zone takes some nifty configuration, no import of host file.

I do not plan on doing that for a host file. Not enough bang for the buck. Follow the link in my signature if you are interested in the zone file option. Thanks for your quick and insightful reply. In the meantime I had a look at the FortiView section of the firewall, and to my great surprise, it looks like local names are being resolved, there - I don't know how this is possible, as the FGT itself is pointed to "Fortiguard Servers" external, public IPs for its name resolution needs.

Subscribe to RSS

So, it appears as the FGT 60E has a way to resolve hostnames of its own, even if not pointed to the local DNS server, but is not able to pass this information up to FortiCloud, where it could greatly enhance the clarity of reports. Anybody using FortiCloud reports can confirm or deny that local hostnames are actually resolved there, and if yes, with which DNS configuration this result is being obtained?

internal dns not resolving

That could maybe do Latest Posts. Re: 60E - Block traffic coming into firewall itself. Active Posts. All FAQs.Skip to main content. Update Available. Select Product Version. All Products. You do not configure any forwarders on the DNS server. Therefore, you cannot access some applications or some websites that rely on these external DNS names.

This issue occurs because the DNS Server service cannot correctly handle the situation in which the glue record is expired or removed. Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. More Information. Last Updated: Dec 27, Was this information helpful?

Yes No. Tell us what we can do to improve the article Submit. Your feedback will help us improve the support experience. Australia - English. Bosna i Hercegovina - Hrvatski. Canada - English. Crna Gora - Srpski. Danmark - Dansk. Deutschland - Deutsch. Eesti - Eesti. Hrvatska - Hrvatski. India - English. Indonesia Bahasa - Bahasa.

Ireland - English. Italia - Italiano.

Internal DNS not resolving local dns names.

Malaysia - English. Nederland - Nederlands. New Zealand - English. Philippines - English. Polska - Polski. Schweiz - Deutsch. Singapore - English. South Africa - English. Srbija - Srpski. Suomi - Suomi. Sverige - Svenska. United Kingdom - English.We all need proper DNS resolution for our network applications. As a network admin, I have heard the alarming cry of end users moaning that the network is down, when it would be the cause of the DNS servers.

In these cases I assure them that the network is up and running fine but it is the DNS servers that are down! As you can imagine, that does not go over very well with them because to an end user, it is all the same thing. Here are the 10 tips and tricks that I recommend you try to get DNS working again….

In reality, the issue is much more likely to be caused by your network connectivity. This is especially true if you are using wireless networking on a laptop. With wireless security protocols, the key will be periodically renegotiated or the signal strength will fade, causing a loss of network connectivity. Of course, you can lose network connectivity on any type of network. Here you should find a wireless connection with a valid Internet connection. Figure 1: Good Wireless Network Connection.

Notice how the Access is Local and Internet. This brings me to my next point. Make sure that you have a valid IP address on your network. Again, if you have a Here is what it looks like:. Once you know that you have network connectivity and a valid IP address, let us move on to digging deeper into DNS by verifying that your DNS Server IP addresses are correct and are in the right order.

This is how it works on most enterprise networks. However, your DNS servers do not always have to be on your subnet. Finally, make sure that your DNS Servers are in the right order. It is configured to forward any names that it cannot resolve to That brings me to two more points. First, make sure that your DNS Servers are in the right order. A quick way to prove that it is a DNS issue and not a network issue is to ping the IP address of the host that you are trying to get to.

I know that if your DNS Server is not functioning then it could be hard to figure out what the IP address is that you want to connect to. Thus, to carry out this test, you would have to have a network diagram or, like many network admins do, just have the IP address of a common host memorized.

If this works, until the DNS server is available again, you could manually put an entry in your hosts file to map the IP to the hostname. You can use the nslookup command to find out a ton of information about your DNS resolution. Here is my nslookup of www. Figure 5: nslookup output. You can also use nslookup to compare the responses from different DNS servers by manually telling it which DNS server to use.

You should have your network adaptor configured with the connection specific DNS suffixas shown on the first line on the graphic above, labeled Figure 1.I have already asked this question in vm community but still got no answers hence asking it here.

Server has manual ip assigned Now that these two vms are communicating perfectly with each other, I thought about connecting them to my physical internet. So, in the Virtual network editor, I added a Host-only type network named VMnet 04 with Use local dhcp service checkbook Disabled and on each of these vms, in network adapter settings, selected specific virtual network and pointed it to VMnet 04 in both vms.

Now, in both the vms, an additional network connection got added and hence was successfully able to browse internet from both vms. Now the REAL problem I havent specified any kind of conditional forwarding etc.

I tried almost all types of settings in vm virtual network editor by specifying dns manually and so on but none worked. A host-only network only allows communication with the host computer. The host computer is the computer running VMWare. To get out to the Internet, your VM needs to be able to send information to the default gateway, which is usually your router. To demonstrate what I mean, try sending a ping from your host computer to your default gateway.

Your default gateway is displayed when you type ipconfig at a command prompt.

internal dns not resolving

The ping should work from the host computer, but it will not work if you try it from the VM. If it does work, then you probably put something in for the default gateway that isn't really a router and cannot route network traffic to the Internet. To connect a VM to the Internet in the simplest way, you should change the network type to Bridged.

When you do this, your VM will be placed on the same network with your host computer. Please be aware though that the IP addresses that they use might already be used by another computer, so you might be better off configuring them to use DHCP instead of a static IP address.

If you decide to use a static address, make sure it is one that isn't already in use and make sure you enter the correct default gateway. Non-authoritative answer: DNS request timed out. DNS request timed out.

internal dns not resolving

Now this 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.Now I connected fine, and I could ping IP addresses on my corporate network, but I could not ping my servers by their domain name, in fact Windows was trying to resolve my domain name to a public IP?

But disabling IPv6 is hardly a fix is it? Why is this happening? This connection takes precedence over your remote VPN connection, to prove it run a netstat -rn command. From the above you can see my Ethernet Adaptor has a metric of 6, and my VPN connector, in this case called Connection Template has metric of Weirdest thing is that the bug is resolved in our case just by only setting the metric from Automatic to Wifi adapter and local NIC still have higher priority 2 and 7.

Could it be that DNS requires a metric of a specific weight to consider it viable route? Pete, This worked!! Thank you!! If you look at the route entries in the netstat output, the metric for each route is at the end of that line. The VPN client is passing the request on and getting a response back, but it does not get passed back to the application. A life saver as always. We set the metric on the vpn and all is good. Our exact issue was that name resolution for our domain members were successful ie.

However resources where the records were hosted on our internal dns servers under a different name ie publicname. Also setting the metric only on the vpn adapter is probably working because using a value of 10 is lower than the value windows 10 sets automatically on the Ethernet adapter. A useful powershell command for this. This worked for me. So maddening, I could see that the IP on my servers was an external one, not an internal, but could not understand why.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up.

Resolving internal hostnames - what is the BEST PRACTICE for DNS settings - Fortigate 60E

I'm really baffled as to why this might be happening. Because internal DNS resolution is not happening, the computer is not able to communicate with the domain properly, so Group Policy can't be applied and I doubt authentication is working properly. I've reset Winsock and the IP stack, and rebooted numerous times with no difference. Other clients in the same network are working just fine. The current workaround is to put entries in the hosts file for the most important hosts for services the user may need to use.

This has worked ok, but isn't really sustainable long term, and doesn't address communication with Active Directory. Update I have installed Wireshark on the effected computer. When I do nslookup domain. When I do ping domain. When I do ping www. An odd thing I noticed is that under the name of the network connection Local Area Network rather than displaying the domain name as I would expect, but rather the name of a VLAN we used to use.

I'm hesitant to remove the computer from the domain, in case I cannot join it again. I'd rather try some other things before I go down a route that might involve reinstalling Windows. Update this looks relevent. Update I have tried netsh winsock reset catalognetsh int ip resetand sfc scannow none of which have fixed the behaviour.

The computer cannot leave and rejoin the domain, as it can't communicate with a domain controller. I've also tried stopping the dns client service to no avail. TLDR; 1. Reset, refresh, reset. Backup data, format, re-install.

Make sure you don't have an entry in the hosts file overriding domain. It may also be worth your time to reset a few things :.I have an interesting dilemma. It seems that some of our users not all are having some issues with resolving DNS properly. It will randomly seemingly randomly break and begin to resolve the external IP address of our old ISP.

Side note: we recently switched ISP's from sprint to brighthouse. Interestingly enough, I discovered that if the user has IPv6 enabled, then I could disable it and their DNS would resolve properly, AND the converse is true as well, if its disabled, enabling it will cause proper resolution.

We have a Dell Sonicwall Security Appliance providing our firewall and routing.

internal dns not resolving

So, my question now is, why is it looking externally for something that is internal? This particular user that is having the most difficulty has the same IPconfig settings as me from aboveonly internal DNS servers listed. I'm fairly confused now. If is looking externally, you might check your routers' settings.

Your internal machines should never be looking outside for an internal address. Specifically look at what forwarders you are using. Agree with Ccraddock. Have you tried flushing the DNS? Ok, with more info, I agree with Bill Kindle. Disable root-hints and check to see if your forwarders are setup correctly Connection-specific DNS Suffix. I also made sure my DHCP server options were the same they were, except for the missing router setting.

All domain computers should list only your internal DNS server. Your DNS server should also point to itself. Also, as was mentioned, if you don't need IPv6, turn it off At the very bottom, under where it says "localhost name resolution is handled within DNS itself", type in the IP of the server and then hit TAB to make a space to type in the server name. If it doesn't allow you to overwrite, save as "host" WITH quotations to your desktop and then overwrite.

One of our backup DC's had an extra entry listed in its Forwarders setting Once you figure out if that fixed it, don't forget to mark Best Answer and Helpful Posts. Be careful if you try this- it can bite you later when you no longer remember you did it and it will prevent DNS from doing its job when you make changes.

The host file should already have a