DNS

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The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

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OWA has me looping; i dont get a failure expect that the page loads.  i checked my virtual directories in IIS and verified that the SSL certificate was bonded to SMTP and IIS.

specifications
Exchange 2013 CU21
Server 2012 R2

there are two cas servers
CAS01 and CAS02

CAS02 is where  the problem lies as it loops from localhost there.  

DNS is correct all the way through.
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I have recently moved a Domain from 2003 to 2016, including FSMO roles, dns, etc... The DC also had a few shares created for "roaming" profiles where we have migrated the data to our new DC as well- This maps to a specific drive when the user logs in and they are able to save data their (Home Folder).  All appears to have worked and users are signing in- However I have hit an issue where if a user is signing into a Win 10 machine in which their profile would have been already on, the PC is logging them on as a "Temp" account producing some event 1511, and 1515 errors stating that "Windows cannot find the local profile and is logging you on with a temporary profile"?  However- This same scenario is different from a Win 7 machine where as a user that has a cached profile on that machine is not receiving those errors, and the profile is loading as expected?

I am stumped- Could anyone help out here?
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I have a Company website that I want to have similar URL's resolve to. The Company website is a Wordpress site and the typical method (e.g. a CNAME in DNS) isn't working.

How can I get my Company Wordpress Site (e.g. https://Company.com) allow other sites to resolve to it (e.g. https://Company-Varient1.com, https://Company-Varient2.com)?

Is there a plugin for this or can I use the HTAccess file? I don't know very much about Wordpress, so I'm limited to what I can read about online.

Thanks for your help.
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Plugged in two network switches to my LAN. They were being used for Comcast Voice previous to today. Now, I have workstations that are having their DNS server address changed to the firewall IP address. The DHCP scope tells them to go to 192.168.1.210, but they are changing to 192.168.1.1.
I can't find any rogue DHCP servers on the network.
Any ideas on areas I could check to see what is telling the computers to change their IP on the DNS server through DHCP?

When we connect via Wireless, those computers aren't impacted.
Only happening on the LAN (ethernet) segment from what I can tell.

Have a Fortigate Firewall
Have Fortiswitches
Have a Cisco SG300-24P
Have a TP Link T1600-52P switch

I checked both switches and both have DHCP server disabled
Both are set to DHCP to pick up a IP
I did have to login to change the IP on the TP-Link
It was defaulted to 192.168.0.1
I had to alter that to 192.168.1.1

Verified firmware is up to date.

The only thing I did yesterday was to plug the phone switches into the Ethernet LAN as the phones would now be using our LAN for IP Addressing and such.
Is there a way to see what's handing out or distributing the 192.168.1.1 for "DNS Server" setting to workstations?

The DHCP server has been 192.168.1.210
But now, on the clients (anything not statically assigned) its showing up as 192.168.1.1

I don't see any other DHCP servers on the network. I am trying to use Wireshark to examine the LAN to see if this is the …
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we already have domain yyy-florida.net which i see under active directory users and computers

my manager asked me that he wants to set up new server and promote
to test1.yyy-florida.net

is he setting up a subdomain  or sub site

while doing DC promo on new windows server 2012 , can he do that

anything to be considered doing from domain controller or active directory side ?

as later he wants users to have email address for.example john@test1.yyy-florida.net

we dont have on premise exchange , we have mailboxes in office 365
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Hi,

I am a noob in the Admin Sys side of things, and at home, I have set up a test lab. My question is regarding DNS setup; I've set up the AD, DNS, server however when I add a test laptop to the domain I need to add the DNS IP manually under IPV4, I can ping the IP address however I can't ping the domain name.

At work, when I add a computer to the domain I don't have to put the DNS IP manually, it will automatically find the domain. Doing my own research and troubleshooting, I noticed when I add the server AD IP on my home router UI in the DNS section, it will find the name and ping the name automatically however internet will not work.

I would appreciate if someone can explain why this is happening and give me some pointers on what I am doing wrong.

Thank you in advance :)
Oscar
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HI -
I cannot connect to a domain on SBS 2011 using Windows/10.  I have a number of Windows/7 workstations as domain connected devices but when I try to connect a Windows/10 workstation it says it cannot reach the Domain.  I can ping the domain from the workstation, as a test, I dropped the firewalls, but nothing worked.

I have set the DNS to point to the server, have set entries in the Host file pointing the domain to the server but it still does not connect.  When we try to add the workstation through the wizard, When it asks for the domain name, the user id and password it accepts the information. On the second screen, when it asks for Domain name and user name, if either one is invalid, it stops me.  When both are correct it bring up the 3rd and final screen, it we enter the domain administrators' account, the correct password and the domain (sometime the domain and sometimes domain.loca) but neither worked.

Any help would be appreciated -

thanks
Rich
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My client owns a SQL cluster named instance, and I'm building a new SQL cluster named instance on a new set of windows servers. The windows servers have different names and IP's, and SQL cluster will have a new IP as well. However, my client wants to retain the same SQL cluster name. Can I do that when both exist on the same domain?

I'm worried the same SQL cluster instance name on two different systems will have a DNS or CNO name conflict.
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Hi,

We have recently acquired another company, MD says 'Join them together so we can communicate and access all resources'. As a one man band looking after the existing company I am stumped.

A run down of what I have to work with.

Company 1
Caxxx.co.uk has 2 locations, hosted DC(DC1) and a production site(Prod1)

Company 2
Sezzzzzz.co.uk has 2 locations also, the hosted DC(DC2) and a production site(Prod2)


The sites are a mixture of Cisco, Sonicwall, Sophos firewalls and there is no overlap of IP ranges between each site. First thought was to create the site to site vpn connections so at least communication could be established, I set this up and am able to ping  device at each locations. Second was to add the forward and reverse lookps into the DNS records which I have done. I am able to connect using the ip address and the FQDN eg. NCL-DC01.ad.caxxx.co.uk but not NCL-DC01.

Can I be pointed in the right direction so I cn read up on what I need to do to get this to work, apart from creating a new forest as this will be done a later stage.

Thanks
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Microsoft Exchange 2016: Emails going to queue and not sending for a while but do eventually send. Users will receive messages from server about the mail being in queue and will retry for the next 1day...

In the connectivity log we have entries like so:

2019-06-18T12:59:41.954Z,08D6F3EBDCDF4A9E,SMTP,me.com,>,Failed connection to 17.178.102.78:25 (TimedOut:0000274C)[TargetIPAddress:17.178.102.78:25|MarkedUnhealthy|FailureCount:5|NextRetryTime:2019-06-18T13:04:41.954Z]
2019-06-18T12:59:41.954Z,08D6F3EBDCDF4A9E,SMTP,me.com,-,Messages: 0 Bytes: 0 (Attempting next target)
2019-06-18T12:59:41.954Z,08D6F3EBDCDF4AA0,SMTP,me.com,*,Session Failover; previous session id = 08D6F3EBDCDF4A9E; reason = SocketError
2019-06-18T12:59:41.954Z,08D6F3EBDCDF4AA0,SMTP,me.com,+,DnsConnectorDelivery 8af61b60-7438-4480-94c7-e6d925543811;QueueLength=TQ=0;RN=1;.
2019-06-18T12:59:43.297Z,08D6F3EBDCDF4A9F,SMTP,gmail.com,>,Failed connection to 108.177.96.27:25 (TimedOut:0000274C)[TargetIPAddress:108.177.96.27:25|MarkedUnhealthy|FailureCount:2|NextRetryTime:2019-06-18T13:00:43.297Z]
2019-06-18T12:59:43.297Z,08D6F3EBDCDF4A9F,SMTP,gmail.com,-,Messages: 0 Bytes: 0 (Attempting next target)
2019-06-18T12:59:43.297Z,08D6F3EBDCDF4AA1,SMTP,gmail.com,*,Session Failover; previous session id = 08D6F3EBDCDF4A9F; reason = SocketError
2019-06-18T12:59:43.297Z,08D6F3EBDCDF4AA1,SMTP,gmail.com,+,DnsConnectorDelivery 8af61b60-7438-4480-94c7-e6d925543811;QueueLength=TQ=0;RN=1;.
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I have a Dell Power Edge T620 Server, with Microsoft Server 2012 and Hyper-V server service installed. On my Hyper-V server I have a DC, Exchange server, File server, app server and 2 servers for a DNS service called Cisco Umbrella. Everything has been fine, but all of a sudden these servers are causing the Dell server to restart randomly.

I've logged into the Dell Server administrator and no errors, I've checked for errors in event viewer and nothing. I updated all drivers and firmware, I've made sure all window updates are done, but these servers still causing problems. This is the only error I receive right before the server restarts.

forwarder-va2' has encountered a fatal error.  The guest operating system reported that it failed with the following error codes: ErrorCode0: 0xB76FD775, ErrorCode1: 0x40000000, ErrorCode2: 0xBF8D7408, ErrorCode3: 0xB774C000, ErrorCode4: 0xB774ED5C.  If the problem persists, contact Product Support for the guest operating system.  (Virtual machine ID 18468AB3-F650-4EF7-B33E-F00B85FA1748)

Any help would be greatly appreciated. Have a good day.
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Hello, experts.  I have a windows domain using Windows DNS.  our internal domain is (example) xxx.edu.  When an employee opens a browser and goes to www.xxx.edu it works as I have a DNS A record pointing to the web site IP.  When the users just types in xxx.edu I get a 503 Service Temporarily Unavailable.  What entry do I need to make in my local DNS to properly redirect the query to our external website?    External DNS host works ok, only happens when we query our internal DNS.

Thanks.
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Hi All,

We use VMware VCenter and have two separate DC/DNS servers configured. We recently had to turn off one of the DC/DNS servers due to maintenance. During this time VCenter reported that all of the physical hosts were disconnected and took a very long time to log in. I could log directly into the physical host no problem. Once this secondary DC/DNS server was back up everything was happy.

I have checked the VCenter settings and the second server was set as the preferred DNS server, so I have swapped this around.

Are there any other settings that I need to change to ensure that the first DC/DNS server is always used. Secondly is there a problem, as it seems a little counter productive to have two servers configured in vCenter but if one is off it still wont work correctly?

Cheers,
Paul
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I can't figure out why a domain is being blocked on our network.  We have one specific site which is our organization site that is perfectly accessible from outside the office.  Inside the office it gives a message that the site "can't be reached"  Check proxy and the firewall.

I ruled out the DNS server being the problem since I replaced the settings on one computer to 8.8.8.8 and the problem still persisted.  We have a SonicWall firewall but I don't remember setting anything in there to block that at all recently.  Are there any troubleshooting techniques that I can utilize to find the underlying cause?

We are utilizing a Windows network with a domain controller.  The site was accessible before and all of a sudden is not.
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I need to lower our DNS lease duration for DHCP clients to 1 day (don't worry why - it's for a reason) and i wanted to know what a recommendation would be for my DNS scavenging with this change. i currently have 7 days set for both scavenging settings. Is this a consideration, or is there no other worry other than alot of systems will check in more frequently and that's all to worry about?
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Cant connect to VMware vCenter Server Appliance 6.7.0.10000. I believe this is a DNS issue as i upgrade to a new Active Directory server but not sure how to fix this.

503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http20NamedPipeServiceSpecE:0x00007f9ff80047e0] _serverNamespace = / action = Allow _pipeName =/var/run/vmware/vpxd-webserver-pipe)
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Using:   Linux  2.6.32-696.18.7.el6.x86_64 #1 SMP Thu Dec 28 20:15:47 EST 2017 x86_64 x86_64 x86_64 GNU/Linux

two DNS Slave Servers...One logs the query.log file to  /var/log/named.log  query.log       The other server logs the query.log file to   /var/named/chroot/var/log/named.log  query.log      

Searching hi and low to find out where to set the files to the directory that i want them...can't find it.   Any thoughts.
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Hi
We have a small annoying issue with location detection for some of our remote office workers when using google chrome.  For some reason this site only (no DNS servers on site) are picking up an old location but the location appears to tally with AD site and services.  
The other two sites (with DNS Servers local) are picking up differing locations.

Bing works fine.

Ideas as to whether this is DNS, Web filtering, AD sites and services or simply google?

Thanks
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Setup a short URl using my sonic wall.....I have a very long url used from our powerapp's and I like to shorten the url like a tiny url for internal user in my company.  I believe I can setup s short cut URL in our sonic wall.  Please advise?
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Gurus,
 i would like to know, if there is any reference website on Microsoft Hardening for AD , DNS , DHCP etc

Regards,
Aaron
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We have a bunch of DNS Servers in our domain and i would like to get the configuration of DNS Forwarders to be sure they have same configuration.
I write a little powershell command to get the information
Import-csv C:\CSV\ActiveDirectory_CSV\CCSMTL\ALLDCs.csv | ForEach-Object {
 $SVR = $_.Name

Get-DnsServerForwarder -ComputerName $SVR }


The only problem I have is that the result does not display the name of the dns server on which it gets the information. Especially that in the result I have a lot of dns server that do not have the same dns forwarders, for which I could make the change afterwards.
So is it anyway to do it, even if i try to get member of command Get-DnsServerForwarder - ComputerName S-ADS001 | gm ?
1
I have configured the website in IIS with the actual server name. Does it create any issue if I use  DNS redirect instead of the server name?

Using IIS 7
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I have a 2019 Essential Server that I made  a PDC...in fact it is the only DC on the network of 27 computers.

Internally the Sonic Wall is providing DHCP and provides DNS from the ISP. I have setup the DC as a Static in the Sonicwall. However, the server has no internet connection unless i put in 8.8.8.8 as a secondary. Shouldn't this work without the secondary DNS?DNS on serverNIC config
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What records are prerequisites for Skype for Business working within Office 365?

Which cname records need to be added?

Any other records required?

When I do a SRV lookup? SIP Federation is in place but nothing else

https://docs.microsoft.com/en-us/office365/admin/dns/create-dns-records-using-windows-based-dns?view=o365-worldwide
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I have 2 windows 2008 R2 domain with 2 servers.  Both are Domain controllers.  DNS failed as did Replication for a period of time.
Once these were restore to an error creeped in.  This is and even ID 4.  I get it when I force Replication within sites and services.
the reason for failure was the Firewall that was installed on the 2 server, and some mistakes were made within DNS.  I was called into get things working again.
This is where I am now.  I have the event ID 4 on the one server.  Here is the basic verbiage.

The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server t410$. The target name used was DAY\T410$. This indicates that the target server failed to decrypt the ticket provided by the client. This can occur when the target server principal name (SPN) is registered on an account other than the account the target service is using. Ensure that the target SPN is only registered on the account used by the server. This error can also happen if the target service account password is different than what is configured on the Kerberos Key Distribution Center for that target service. Ensure that the service on the server and the KDC are both configured to use the same password. If the server name is not fully qualified, and the target domain (.LOCAL) is different from the client domain (.LOCAL), check if there are identically named server accounts in these two domains, or use the fully-qualified name to identify the server.

The best I can discover is …
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DNS

26K

Solutions

26K

Contributors

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.