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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I have to create a cname for a web server i was wondering if i have two servers with different IP's for fault tolerence how can i create a cname that would work for either server in case one is down?
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Has anyone run into scanning issues with the Xerox Phaser 3635MFP.   This was working just fine up 2 about 2 weeks ago.   I changed the DNS settings on the DC to reflect the correct DNS and the scanner has lost its ability to scan to folder.  


Current setting


IP 192.168.14.11 local static
class c subnet
192.168.14.5 gateway

192.168.14.30 <-- DC

127.0.0.1 secondary DNS
8.8.8.8 akternate DNS

File repository setting

NAME (Customer name)
Protocol SMB
hostname file server name no \\ or //
share scanned (Name of folder) no \\ //
login domain\administrator
domain admin pw

the only thing that was changed was the DNS which I updated on the scanner as well.

The folder has system full access as far as permissions.

Help.
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We have moved machines from domain Alpha to domain Omega (mock names).  Anyway, we removed the windows 10 computers from the domain to a workgroup, restarted the PCs Win 10), joined them to the new domain, 'Omega'.  They join fine.  Users logon and it seems good.  However, they cannot map drives to the file server 'Data' on the domain.

Also, on the machines, that have the issue, when they ping the DC or file server, it is appending the old domain to the response.  There is only one DNS server currently in the new domain being set up.  Roughly half of the users have no issues and can map drives and surf the web.  The other half has a problem mapping drives, locating local devices and can surf the external internet sites.

I'm not seeing anything on the DNS side.  One machine effected, I have looked at the registry and found several keys referring to the old domain lingering.  I removed them and fixed the ping issue.

Ideas on a course of action?
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I run dnscmd /zoneexport mydomain.local backup\mydomain.local.bak to back up my DNS each week. I then rename the file mydomain.local.bak and copy it out of System32\dns to an alternative location. I need the syntax that will import the entire file into DNS. dnscmd /zoneadd just created a new zone. Again, I need the syntax that will import the entire file into DNS. No powershell please if possible
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Hello,

Is anyone know how to create SRV record from GUI or command line on Cisco Network Registrar 7.1.2.1 ?

Thank you.

Regards,

Xavier De Arburn
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Keep getting the following error on one of our domain client's pc's:  The name "my domain' :1d could not be registered on the interface with IP Address: 10.1.1.43. The computer with the IP address 10.0.0.46 did not allow the name to be claimed by this computer."  
Log Name: System
Source: NetBT
Event ID: 4321 Level Error

The computer with this problem can access the domain (all mapped drives) and can ping everything on the network.  
This computer cannot be pinged (IP or DNS name) by any other pc on the domain.  
Here is what I have done so far:
  1. gave this pc a static IP address (was dhcp before)
  2. Flushed the DNS
  3. Un-joined it from our domain and then rejoined it back to the domain.

I am still getting the same error and cannot ping or access from any other computer or server.

Anyone have any suggestions?
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Hi All,

Looking for options for Redundant, Managed Public DNS.
Currently opened conversations with Azure, AWS and NoIP so am already aware of these options- looking for others.

Scenario:
(3) ISPs, all with numerous dedicated static IPs.
All ISPs provide a separate IP block.
Need a Public Reverse DNS failover solution so that when one ISP goes down the other immediately picks up for incoming connections to web servers and apps.

Currently:
- The primary ISP does not allow managed reverse dns resulting in the need to use the secondary ISP for all incoming traffic. (this isp is necessary as the primary due to band width issues).
- When the Primary ISP fails, the secondary kicks in for outgoing. This is fine except when the secondary fails all connections to web servers is lost until the tertiary ISP picks up.
- When the tertiary ISP picks up the traffic, the TTLs are not great so web server downtime can be an issue.
- Also, independent from the primary and tertiary ISPs, when ISP #2 goes down all public connections to internal servers goes down with a long TTl to roll over to #2.

Looking for a solution to manage the DNS to fail over to the other static IPs when the various ISPs go down.  

Any suggestions?
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Hi,

I change the Plesk (windows) backup folder from C drive into our NAS drive. I map the NAS drive as P drive and run the "Change Plesk Backup Data location" under 'Plesk Reconfigurator' to change the path. Current backup data move into P drive (NAS) and path also changed.

Issue:
When client, re-seller and administrator (me) is not able to take the backup. We received an error:
Error: The backup process failed: (3, 'GetDiskFreeSpaceEx', 'The system cannot find the path specified.')

Please also review the logs. Please let me know whats actually i am missing? I need to assign permission on NAS drive. Currently only administrator have rights to access NAS drive (P) but i am not able to take backup via administrator account. Same error.  

Logs:

[2019-04-14 00:00:08.375|8528] DEBUG: LOG: custom log C:\Program Files (x86)\Plesk\PMM\logs\backup-2019-04-14-00-00-08-375\backup.log
[2019-04-14 00:00:08.375|8528] CRITICAL: Runtime error in pmmcli: 
<class 'pywintypes.error'> (3, 'GetDiskFreeSpaceEx', 'The system cannot find the path specified.')
Traceback (most recent call last):
  File "C:\Program Files (x86)\Plesk\admin\share\pmmcli\pmmcli.py", line 2560, in main
    data_action_response, errcode_response, error_message = actions.get(sys.argv[1][2:])(parameters)
  File "C:\Program Files (x86)\Plesk\admin\share\pmmcli\pmmcli.py", line 2455, in make_dump
    return ActionRunner(MakeDumpAction, backup_task_description, None).doActivity()
  File "C:\Program 

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I'm needing to add a WINS server entry to a bunch of servers(please don't ask why).
I modified a DNS script I used recently and although it runs, it does not actually add the WINS entry.
$computer = get-content .\systems.txt
$NICs = Get-WMIObject Win32_NetworkAdapterConfiguration -computername $computer |where{$_.IPEnabled -eq “TRUE”}
  Foreach($NIC in $NICs) {
#$WINSServers = “1.2.2.2",”1.2.2.3"
$NIC.SETWINSSERVER (“1.2.2.2",”1.2.2.3")
}

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I tried it with and without $winsservers, same result, the IP is not added to wins entry on the server.

I actually only need one entry, not 2, but when it failed initially, I added the second entry to rule out that being the issue somehow.
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sonicwall NSA 4500       SonicOS Enhanced 5.9.1.8-1 need help getting  wan traffic to pass through to local private 10/24 dns servers (suddenly getting ip sppof issues
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Internet explorer and Edge does not open webpages giving the following error: There was a temporary DNS error. Try refreshing the page.
Error Code: INET_E_RESOURCE_NOT_FOUND. When accessing the internet with Chrome, it works without any problems and you can access any website. I have reset network settings and also flushed the dns and cleared everything in the browsers. Nothing made a difference. Any idea what is causing this? Windows 10 pro is the operating system and this problem started about 2 weeks ago.
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Hello,
how I can create my own smart dns proxy ?
thanks.
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I want to document DFS within an organisation, whats best way to do this?

I have good notes on AD, DHCP, DNS etc just looking for DFS

Environment is 2012 r2 environment

Found this

https://gallery.technet.microsoft.com/List-Distributed-File-3f399d9d

Any other ways appreciated
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Hello All,

I am trying to remove an old SBS DC that is no longer online.  I was able to remove it from ADSS and ADUC but when I run the ntdsutil and clean the metadata I get the error in the attached file.  The new server is 2016 and it is the DC and holds all the operations masters and is the GC.  I can't remember if 2016 cleans up all metadata once the DC is removed from ADSS or not - I thought it did hence the reason I am getting the error???  I have also already manually removed everything from DNS for the old server.

Any suggestions if the metadata is still there.

Regards,

Rob
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I am currently migrating from exchange 2010 to 2013 I have all the servers set up 2 mailbox and 2 CAS along with my 2010 2 mailbox and 2 CAS.  There is a load balancer in-front of the 2013 server but when I switch the autodiscover DNS entry to the load balancer when a user opens outlook I am getting a cert warning the server is coming up servername.domain.local instead of mail.domain.com which is the certs primary domain.  All the 2013 virtual directories as well as the load balancer is in the mail.domain.com form what am I missing I understood you didnt need to and shouldnt have the local servers name on the SSL cert.  Any Ideas?

Also the only thing I can find different all the 2013 components OWA, OAB, ECP etc point to mail.domain.com but the autodiscover  there seems to be two for the 2010 server and for the 2013.  I have been changing the autodiscover.domain.com to point to the load balancer which outlook then throws the error.  It the below correct?EX2013
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I'm still having issues getting my new server fully online. I created my new domain on Windows Server Essentials 2016, and migrated all the computers from the Windows Server 2012 domain onto the new domain.

Everything seems to be working except for DNS/DHCP. I have to set a static IP as well as define an outside DNS server such as 1.1.1.1 in order to get internet on my devices.

If I power back on the old server which no devices are connected to, I can connect to the internet without settings a static IP or DNS server.

I'm thinking there's a problem with the DNS on my new server, though I'm not sure what it is. The server is brand new, on a new domain as the primary DC. I migrated the DHCP settings from the old server and adjusted them to remove references to the old server, and set references to the new server.

When I run dcdiag /fix I get the following output:

Starting test: SystemLog
         An error event occurred.  EventID: 0x0000168F
            Time Generated: 04/04/2019   22:05:16
            Event String:
            The dynamic deletion of the DNS record '_kerberos._tcp.dc._msdcs.ad.domain.com. 600 IN SRV 0 100 88 SVR-HVDC1.ad.domain.com.' failed on the following DNS server:
         An error event occurred.  EventID: 0x0000168F
            Time Generated: 04/04/2019   22:05:16
            Event String:
            The dynamic deletion of the DNS record '_kerberos._tcp.Default-First-Site-Name._sites.dc._msdcs.ad.domain.com. 600 IN SRV 0 100 88 

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Windows 2016 SMTP relay server. When DNS setting on the server are external, 8.8.8.8, mail will sent. When I change them to my internal DNS server 10.0.1.11. Mail does not sent.
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I've had Active Directory Management consoles & DNS on my workstation to manage our domain without the need to log into DC directly, my workstation runs Windows 10.  I just updated to 1809 over the weekend now Active Directory Consoles & DNS are gone.
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What should the public DNS be setup as for Exchange 2007/2013 coexistence.  I may be over thinking this but, do I adjust my firewall to point the existing IP to my EXCH2013?  I'm confused at this point.  I'm not sure how the additional public IP I setup comes into play.  currently I have mail.domain.com, legacy.domain.com, autodiscover.domain.com pointing to my Exchange 2007 server.  I added an IP for newmail.domain.com pointing to Exchange 2013.  I don't plan on using the name newmail but wanted it up there so I could have a placeholder.  I just don't understand how the new IP would come into play.  I would think I just adjust my firewall to point to my 2013 server.

Example of my public DNS:
mail.domain.com - 66.67.68.1
legacy.domain.com - 66.67.68.1
autodiscover.domain.com - 66.67.68.1
newmail.domain.com - 66.67.68.2

New setup?
mail.domain.com - 66.67.68.2
legacy.domain.com - 66.67.68.1
autodiscover.domain.com - 66.67.68.2
???
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Hello Team.
I’m hoping some DNS, DHCP masters will help to understand a bit more how Secure dynamic DNS registration works and tell me if my solution is the best approach.

Problem Description
From time to time when users are connecting to different VLAN or VPN, The DHCP Server or the Client is not creating either a A record or PTR record

Environment:

Users would use either Windows 7 or Windows 10. We don’t have any lower OS.
DHCP, DNS roles are installed on Domain Controllers. DHCP is running on 3 Windows Server 2012, and DNS is running on 3 Windows Servers 2012 and 1 Windows Server 2016.

Troubleshooting:
This issue seems to be since a long time as another IT departments from time to time where telling our team that DNS is not working proper. The problem is that when they were telling that their issue got already resolved, so we never got the opportunity to understand what the issue really was until recently where I finally got a incident and hands on a laptop where the Registration really wasn’t working. When I saw that I started to dig into that issue more details.
First I checked if the problem is not with some VPN connection but quickly with Networks team we were able to prove that VPN is not the issue as two laptops where having no issues at all getting a A and PTR record.
I started to look into the Configuration on the DHCP scopes and DNS Forward Lookup zones and discovered following:
The DHCP Server under the DNS setting has …
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Active directory was corrupted by bad VM memory. I do not have full admin access only vsphere access. DNS does not have domain or forest DNS Zones. Unable to manually build.  sysvol and netlogon unfixable. Finally after a week of having fun I did a bare metal image of DC1 (FSMO).  I am able to build from scratch (after demoting to member server) the same two servers back up and they are running fine. Good replication, Net share is good. However I do not want to use DSRM and recover the corrupted SYSVOL and NetLOGON. I have a full GPO backup, but I don't know how to backup only the Active Directory. I am working this weekend to get this fixed.  I have already tried restoring just NTDS and the log, verifying it is good and dropping it in the correct folders. I verified/fixed the permissions. Active Directory does not see the NTDS. HELP!
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how to manually fix or build forest and domain dns zones in dns
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Hi Folks,
So a couple of my websites on my domain are getting flagged for phishing on virustotal.com. I need to go through the delisting process and cannot find where I should do that. This is happening with AegisLab WebGuard and CyRadar specifically. Can anyone point me toward the resource to do that?
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I'm having trouble setting up autodiscover for our Exchange 2013 infrastructure. We have two domains, let's call them domain.co.uk and domain.com and both of these should be serviced by the same server, which is set up at mail.domain.co.uk.

Autodiscover on Exchange is set up correctly for domain.co.uk and the certificate that the Exchange server presents is a wildcard certificate for *.domain.co.uk. Therefore when you add email@domain.co.uk to one of our corporate mobile phones, it gets all of the user settings and correctly sets the phone up automatically.

Autodiscover for domain.com does not work under the same scenario. It reports that it cannot verify the account. If you enter the information manually, it works.

DNS is set up thus:

autodiscover.domain.co.uk 3600 IN CNAME mail.domain.co.uk
_autodiscover._tcp.domain.co.uk 300 IN SRV 0 0 443 mail.domain.co.uk

_autodiscover._tcp.domain.com 300 IN SRV 0 0 443 autodiscover.domain.co.uk

Microsoft's Remote Connectivity Analyser says that all is well. Can anyone shed any light on what I might have set up incorrectly?

Thanks in advance.

Phil
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We recently switched from an Exchange Server 2010 (on premises) to an Exchange Server 2016 (on premises).

A co-worker (Cory) is part of a group where people post messages to it, and others respond to the "posts".
Her "sent" emails to the group, are staying in our Exchange 2016 queue for 48 hours, then not delivered.

For example,

Identity: VMEXCHANGE\3\5295694675989
Subject: RE: The client's case is ready for review.
Internet Message ID: <3107f8236ceb47e8a6c96e1e1d3@mydomain2.com>

From Address: Cory@mydomain2.com
Status: Retry
Size (KB): 16
Message Source Name: SMTP:Default VMEXCHANGE

Source IP: 192.xxx.x.xxx
SCL: -1

Date Received: 3/23/2019 4:10:24 PM
Expiration Time: 3/25/2019 4:10:24 PM

Last Error: 450 4.1.8 <Cory@mydomain2.com>: Sender address rejected: Domain not found
Queue ID: VMEXCHANGE\3

Recipients:  discuss@mainstoranges.info;3;2;
{LED=450 4.1.8 <Cory@mydomain2.com>: Sender address rejected: Domain not found};{MSG=};{FQDN=};{IP=}; LRT=}];0;CN=Default,CN=Connections,CN=Exchange Routing Group (DWBGZMFD01),CN=Routing Groups,CN=Exchange Administrative Group (FYDIBOHF23),CN=Administrative Groups,CN=First Organization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=TD,DC=local;0

Note:  We have 2 internet domains names that "point" to the same Exchange Server 2016 (mydomain1.com, mydomain2.com).  Most of us in the firm use mydomain1.com (as sender and reply to address).  Cory (and 4 other co-workers) use mydomain2.com (in the …
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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.