Changed server IPs, getting errors.


Recommended Posts

I split my network into multiple VLANs putting all the servers into a VLAN and clients on to a separate VLAN.

 

I have changed the server IPs to reflect this.

 

My main DC is 2008 which I am slowly migrating to a new 2012 r2 server, which is currently the secondary DC.

 

Everything seems OK except from the Group Policy Management Console on the 2012, when loading it says:

 

"The specified domain controller cannot be contacted"

 

I can select the Master manually but then I get a different error:

"The RPC Server was unavailable"

 

Most google results relate to firewall issues, however the Windows Firewall is disabled on both servers.

 

2012 server is a VM.

.. I have also noticed I can't access it remotely, I need to go through Hyper V Manager on the host.

 

Any ideas?
 

Link to comment
https://www.neowin.net/forum/topic/1252694-changed-server-ips-getting-errors/
Share on other sites

And what do you have in your AD.. Why did you split them to different vlans?  And your not firewalling between the segments?  What is doing the routing between your segments?

 

Can you give us details of what is routing and what your segments are?  Do you have dns on both servers?  What does dcdiag say ?  https://technet.microsoft.com/en-us/library/cc731968.aspx

^ Exactly -- think maybe they just changed the address space and running both over the same physical network.  Or did they just say lets use 192.168.0.1-254 for clients and 192.168.1.1-254 for servers in our 192.168.0.0/23 ??  Details will help us help you.

  On 07/04/2015 at 10:43, BudMan said:

And what do you have in your AD.. Why did you split them to different vlans?  And your not firewalling between the segments?  What is doing the routing between your segments?

 

Can you give us details of what is routing and what your segments are?  Do you have dns on both servers?  What does dcdiag say ?  https://technet.microsoft.com/en-us/library/cc731968.aspx

 

Because we are coming away from our local authority network and had it reconfigured as a result.. we now have multiple VLANs: servers, printers, wireless APs, finance, workstations.

 

Firewall was just disabled for testing.

VLAN NAME, IP, ADDRESS RANGE, ROUTER, DEFAULT GATEWAY 
VLAN 80 ROUTING NETWORK 10.83.125.208 /28 10.83.125.209 10.83.125.215 
VLAN 81 
VLAN 82 FINANCE 10.83.121.0 /24   10.83.121.1 
VLAN 83 PRINTERS 10.83.122.0 /24   10.83.122.1 
VLAN 84 SERVERS 10.83.123.0 /24   10.83.123.1 
VLAN 85 WIRELESS AP 10.83.124.0 /24   10.83.124.1 
VLAN 86 WORKSTATIONS 10.83.112.0 /24   10.83.112.1 

Yes DNS is on both servers.

     Starting test: FrsEvent

         There are warning or error events within the last 24 hours after the

         SYSVOL has been shared.  Failing SYSVOL replication problems may cause

         Group Policy problems.


     Starting test: NetLogons

         [WVPS-SCH-SRV] User credentials does not have permission to perform

         this operation.

         The account used for this test must have network logon privileges

         for this machine's domain.

         ......................... WVPS-SCH-SRV failed test NetLogons



    Starting test: Replications

         [Replications Check,WVPS-SCH-SRV] DsReplicaGetInfo(PENDING_OPS, NULL)

         failed, error 0x2105 "Replication access was denied."

         ......................... WVPS-SCH-SRV failed test Replications




      Starting test: Services

            Could not open NTDS Service on WVPS-SCH-SRV, error 0x5

            "Access is denied."

         ......................... WVPS-SCH-SRV failed test Services

Seems like some permission errors? Maybe unrelated to the networking changes? It is strange this only happened after network changes, these errors weren't present previously.

Well you might be getting access denied because of dns problems pointing to old IPs, etc..

 

Validate dns with dcdiag..  As to firewalls - not talking software firewall.. What is actually routing between your segments?  A layer 3 switch?  Router/Firewall distro, hardware router?

As budman stated you are probably missing something, a dns entry on your network adapters possibly.   may need to run a ipconfig /registerdns to force an immediate update to dns. 

 

If you have internet access, I would be more than happy to look at this for you.  open up a teamviewer session (go to teamviewer.com) and pm me the id and password.

  On 07/04/2015 at 12:24, BudMan said:

Well you might be getting access denied because of dns problems pointing to old IPs, etc..

 

Validate dns with dcdiag..  As to firewalls - not talking software firewall.. What is actually routing between your segments?  A layer 3 switch?  Router/Firewall distro, hardware router?

 

Cisco Catalyst 3560 v2

 

  On 07/04/2015 at 12:38, Jared- said:

Can you access other VMs on your Hyper-V host remotely? 

 

Yes they seem ok.. We have 3 VMs on the server, one of them is the domain controller which is the only one I am having trouble from.

 

  On 07/04/2015 at 13:05, sc302 said:

As budman stated you are probably missing something, a dns entry on your network adapters possibly.   may need to run a ipconfig /registerdns to force an immediate update to dns. 

 

If you have internet access, I would be more than happy to look at this for you.  open up a teamviewer session (go to teamviewer.com) and pm me the id and password.

 

I am off site now but will give it a go tomorrow.. If I need help I will send you team view details in PM, thanks for the offer.

This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Popular Now

  • Posts

    • Every product Apple is expected to unveil in the rest of 2025 by Hamid Ganji While we're in the middle of 2025, Apple fans still have exciting months ahead. Apple's foray into 2025 began with the new budget-friendly iPhone 16e, followed by the M4 MacBook Air and new iPad models with upgraded chips and Apple Intelligence. However, the iPhone maker has a slew of unannounced products for the rest of the year. Most of these products will be unveiled in September and October. Here's every product Apple will unveil in the rest of 2025. iPhone 17 Series Apple's September event will feature the iPhone 17 series as the torchbearer. The lineup includes iPhone 17, iPhone 17 Air, iPhone 17 Pro, and Pro Max. The new Air model will replace Plus models in the iPhone lineup, focusing on slim design and portability. Apple is expected to change the camera layout design in the iPhone 17 Pro and Pro Max variants. New Apple Watch models for the year As is customary every year, Apple will roll out a new Watch device in 2025. In September, we'll get our hands on the Apple Watch Series 11. The wearable is expected to launch with a faster processor, 5G RedCap support, satellite connectivity, and blood pressure monitoring. At the September event, Apple will also reveal the next-gen Apple Watch Ultra 3 and a new, cheaper SE Watch with a plastic body. All new Apple Watch devices get the revamped WatchOS. M5 MacBook Pro Bloomberg's Mark Gurman already reported that Apple plans to release MacBook Pros with M5, M5 Pro, and M5 Max chips this fall. This model is expected to be released sometime in October. However, the biggest MacBook Pro refresh is planned for 2026, when it will get an OLED display and a makeover. Mac Pro with upgraded chip Apple Mac Pro got its latest update in 2023 with an Apple M2 Ultra chip. While there is no confirmation yet about a new Mac Pro in the works with an M4 Ultra chip for 2025, Mark Gurman said Apple could release Mac Studio and Mac Pro with an upgraded chip in mid-2025. 32-inch iMac Back in 2023, Apple analyst Ming-Chi Kuo said Apple plans to launch a 32-inch variant of the iMac in 2025 with a mini LED display. He also predicted a 24-inch iMac refresh in 2024, which happened to be true. So, if you're looking for a bigger iMac and can't afford the 32-inch Pro Display XDR, it'd be better to wait for the iMac refresh in 2025. iPad Pro with M5 chip In 2024, the iPad Pro received a slew of upgrades, including a new chip, OLED display, and slimmer design. According to Mark Gurman, Apple is also expected to release an M5-powered model in 2025, codenamed J817, J818, J820, and J821. Alongside these products, Apple might reveal several other devices in 2025, including Apple TV 4K, AirTag 2, HomePod mini, and AirPods Pro 3.
    • This should come as no surprise to anyone. From everything I've heard about Musk, people don't particularly like him on a personal level and when people feel that way about you, sitting at your PC and looking through other people's messages on the platform you bought is just another thing I can see him doing.
    • Thank you for sharing! Microsoft Edge is an excellent browser. I really like how the vertical tabs make everything easier to manage.
    • I use Firefox because I prefer to have native support for the uBlock Origin extension.  You can get it to work with Chrome-based browsers, but you have to jump through some hoops to make it work properly.  If you're not using uBlock Origin or your browser isn't allowing you to use it properly, you'd be shocked at how many extras it kills on basic web pages like Yahoo.    
    • Thanks for sharing! Vivaldi does have a nice interface. I've heard good things about how well it works across devices. I get what you mean about Chrome and Firefox's looks; everyone has their own style and preferences when it comes to browsers. What's your favorite Vivaldi feature?
  • Recent Achievements

    • Apprentice
      DarkShrunken went up a rank
      Apprentice
    • Dedicated
      CHUNWEI earned a badge
      Dedicated
    • Collaborator
      DarkShrunken earned a badge
      Collaborator
    • Rookie
      Pat-Garrett went up a rank
      Rookie
    • Week One Done
      Outdoor Saunaio earned a badge
      Week One Done
  • Popular Contributors

    1. 1
      +primortal
      318
    2. 2
      snowy owl
      164
    3. 3
      +FloatingFatMan
      155
    4. 4
      ATLien_0
      150
    5. 5
      Xenon
      125
  • Tell a friend

    Love Neowin? Tell a friend!