Good Day,

Got a question which I am not sure about.

I got a Server 2012 Hyper V Host running 3 Virtual servers
6 NICS and 2 NIC Teams

Virtual Servers:

ServerA- DHCP DNS DC
ServerB
ServerC

ServerA has one virtual NIC and it is statically assigned IP address. IPv6 on this nic is disabled.

However on the DNS there are 3 entries showing for this server.

1. ServerA - Host(A)  10.11.1.12  static  ( This is the static one on the only nic on this server )
2. ServerA - Host(A) 10.11.1.115 static ( Not sure where this is coming from. I tried deleting it and it comes back after some time. ?? )
3. Server A  IPv6 Host (AAAA)  - long mac address - 8/12/2017 11 PM


Shouldn't there be only 1 entry ?  

The same issue is with couple of other severs. Either my concepts are not clear or it is something weird.

Thanks

I'm unable to send emails to external addresses. Emails send between addresses on the same server complete successfully. I'm running centos 6 and Centos Web Panel with roundcube. Mail log is in the pastebin link below. DNS testing info to follow. Any advice is appreciated.

https://pastebin.com/7wThcN7Q

https://mxtoolbox.com
smtp:172.93.52.12
SMTP Reverse DNS Mismatch      OK - 172.93.52.12 resolves to ing.jingersoll.com
      SMTP Valid Hostname      OK - Reverse DNS is a valid Hostname
      SMTP Banner Check      OK - Reverse DNS matches SMTP Banner
      SMTP TLS      OK - Supports TLS.
      SMTP Connection Time      0.651 seconds - Good on Connection time
      SMTP Open Relay      OK - Not an open relay.
      SMTP Transaction Time      2.488 seconds - Good on Transaction Time
Session Transcript:
Connecting to 172.93.52.12<br /> <br /> 220 ing.jingersoll.com ESMTP Postfix [600 ms]<br /> EHLO PWS3.mxtoolbox.com<br /> 250-ing.jingersoll.com<br /> 250-PIPELINING<br /> 250-SIZE 204800000<br /> 250-ETRN<br /> 250-STARTTLS<br /> 250-AUTH PLAIN LOGIN<br /> 250-AUTH=PLAIN LOGIN<br /> 250-ENHANCEDSTATUSCODES<br /> 250-8BITMIME<br /> 250 DSN [607 ms]<br /> MAIL FROM:&lt;supertool@mxtoolbox.com&gt;<br /> 250 2.1.0 Ok [616 ms]<br /> RCPT TO:&lt;test@example.com&gt;<br /> 454 4.7.1 &lt;test@example.com&gt;: Relay access denied [607 ms]<br /> <br />PWS3v2 3018ms<br />

DiG  ANY jingersoll.com +trace
jingersoll.com.            14400 IN TXT "v=spf1 +a +mx +ip4:172.93.52.12 ~all"
jingersoll.com.            14400 IN MX 0 mail.jingersoll.com.
…

Hi,

I have a Ubuntu webserver on amazon running Apache and I want the site to be able to send emails.
I have installed and configured postfix, and it works... apart from email always going to spam.

I understand that if I create a SPF DNS record i can reduce the chance of it going into spam... and also reduce stop spammers from spoofing your domain.

I don't quite understand how the record works... could someone help......

Example:
Server Hostname: example.uk
Emails get from from server@example.uk

DNS Records on 123reg
@ A Record 12.34.56.78 (external ip)

Emails will only be sent from server@example.uk

Can someone help create a SPF Record.

Thanks

Steve

I will be migrating a Google Gmail email domain to Office 365.

I have gone through and completed all the required steps as documented on the Migration Wiz website to do this.

I have created the required TXT record within this company's external DNS provider (asmallorange.com) and have been told by the Office 365 domain wizard that I need to add the records shown in the screenshot to our external DNS provider (asmallorange.com).

Is it possible for me to add these records to our external DNS provider (asmallorange.com) while leaving the existing records for Gmail in place?

I want emails to continue to go to user's email accounts within Gmail. The only thing I want to do now is to finish the domain verification of the domain name that is currently being used by Google/Gmail so I can then use the migrationwiz.com website to migrate the email from the Gmail servers to the Office 365 servers.

Then once this migration has completed I will replace the external DNS Gmail email records with the Office 365 DNS records shown in the screenshot and will create new Outlook profiles for all users so Outlook will connect to the Office 365 servers for email.

What I need to do now is to finish the email domain verification within Office 365 so I can then perform the migration wiz migrations (while we coninue to use Gmail as our email service provider--but I don't want to interrupt any future emails from arriving at the Gmail servers until I officially cut the online DNS …

We had this problem start suddenly 3 - 4 months ago and still can't track it down.  We have Sharp MFD's:  models, MX-3100N, MX-M453N, MX-4111N, which all intermittently, not often, give the user a "Network Error CE-00" error when scanning a document to a network share location.  They can wait a variable amount of time, try again, and it works perfectly.  This is using SMB.  
   We've tried updating the firmware and using the IP address, rather than the DNS name in the scanning configuration, with no success yet.  
   We understand that it is a network connectivity issue in some fashion but still can't track it down.  This is on multiple devices, so doesn't seem to be a hardware problem.  There weren't any other changes during that time period when it started happening.  Thanks for any thoughts on this!

We have 2 DC. DNS is installed in both. Now both DC are giving this error: The DNS server has encountered a critical error from the Active Directory. Check that the Active Directory is functioning properly. The extended error debug information (which may be empty) is "". The event data contains the error.

Ran DNS Test, Below is the result:

C:\Windows\system32>dcdiag /test:dns

Directory Server Diagnosis

Performing initial setup:
   Trying to find home server...
   Home Server = QAKSQSDCDN01P
   * Identified AD Forest.
   Done gathering initial info.

Doing initial required tests

   Testing server: QADN\QAKSQSDCDN01P
      Starting test: Connectivity
         ......................... QAKSQSDCDN01P passed test Connectivity

Doing primary tests

   Testing server: QADN\QAKSQSDCDN01P

      Starting test: DNS

         DNS Tests are running and not hung. Please wait a few minutes...
         ......................... QAKSQSDCDN01P passed test DNS

   Running partition tests on : DomainDnsZones

   Running partition tests on : KI

   Running partition tests on : ForestDnsZones

   Running partition tests on : Schema

   Running partition tests on : Configuration

   Running enterprise tests on : KEPPELGROUP.COM
      Starting test: DNS
         Test results for domain controllers:

            DC: QAKSQSDCDN01P.KI.KEPPELGROUP.COM
            Domain: KI.KEPPELGROUP.COM


               TEST: Basic (Basc)
                  …

Hi all. Anyone got any ideas about how best to look at 2 Domain Controllers and compare them for configuration?

So something that views LDAP policy, DNS resource weight and priority, a tool perhaps that makes comparisons and spots differences? Or maybe nothing like this exists?
Thanks all

My Question is, do I need port 443 for legacy.Domain.com to point to the exchange 2007 server if the users do not use OWA, during the migration of 2007 to 2013 Exchange?
 Offsite users are configured for Outlook anywhere, and I am not sure if that uses port 443.

What are the exact steps to lookup which company hosts a company's external DNS records?

I will be migrating a company from a corporate Gmail account to Office 365. Currently no one knows which company is being used to host this company's external DNS records. I will need to change these external DNS records to point to the Office 365 servers to successfully complete the migration from Gmail to Office 365.

I'm already familiar with using websites like MXtoolbox.com but where within MXtoolbox.com or other websites can I determine exactly which external DNS provider hosts a company's external DNS records including the MX records?

First off let me start with I work with a school system, so I do the bare minimum w/ ASA configuration.

Apparently, different services/companies are starting to use systems w/ CDN so IP addresses change and I can no longer just white-list IP w/ ports. I have to do URL w/ ports. (URL filtering?)

I've been doing my research but having a hard time understanding how to get this all setup. I have a Cisco 5525, and manage it was Cisco ASDM 7.1, I went into -> URL Filtering Services -> selected "Secure Computing SmartFilter Port: 4005" Servers are set to: Inside my internal DNS server, timeout 30, protocol TCP and TCP connections 5.

I haven't done anything else..  I need help, Do have to configure anything on my local DNS? Where to I add the URL's ?
Any help at all is very greatly appreciated and thank you in advance!
Best,
Ron

I will soon be migrating our AD domain controllers to Server 2016. We have a few DC's in the 1 forest but the one that holds the FSMO also has a lot of other services like DHCP and its a certification authority. I've come up with a very high level list of the process involved, id like to see if I am on the right track by the experts on here. My main concerns are over keeping the same IP and Name as the old DC and moving the certification authority.

The server I'm looking to migrate initially is ADC1

1.      Move services to ADC2
   a.          Move RD Licensing Server
   b.          Move DHCP (or test if we can use the failover DHCP (ADC3) server)
   c.          Migrate FSMO roles
2.      Backup Certification authority on ADC1
3.      Find out what KMS keys are used on ADC1
4.      Remove Certification authority services from ADC1
5.      Turn off ADC1 and test connectivity and logons.
6.      Turn ADC1 back on.
7.      Demote ADC1
8.      Remove all entries for ADC1 from DNS and AD schema
9.      Create new 2016 server (with same IP and name as removed DC) and promote to DC
10.      Upgrade forest schema to 2016
11.      Install certification authority on new DC and restore from backup
12.      Reinstall KMS and keys on new server
13.      Move DHCP back to ADC1 and ensure failover is still working to ADC3
14.      TEST DNS and AD replication.