Tuesday, December 11, 2012

DNS IP to localhost

While I am doing this coding of DNS server and using my development machine to debug the program, I need to somehow configure my Windows 7 client's DNS setting to point to itself as the DNS server (e.g.

Surprisingly, Windows 7 rejects the setting when you put as the DNS IP address of your network connection.

Found the following Powershell to change it easily

$wmi = Get-WmiObject win32_networkadapterconfiguration -filter "ipenabled = 'true'"

Monday, November 05, 2012

SSRS SQL 2008 R2 Export Reports

I need to migrate reports from the old SSRS to the new one. To do this, I need to export all the reports as an RDL file and upload them all to the new SSRS server

Found this article by geektrainer.com how to create a VB script .rss file to exports all SQL Server Report file as an .rdl file.

Here is the code:

'must use -v rootPath="C:\Reports"
Sub Main()    
    Dim items As CatalogItem() = rs.ListChildren("/", true)

    For Each item As CatalogItem in items
        If item.Type = ItemTypeEnum.Folder Then
        Else If item.Type = ItemTypeEnum.Report Then
        End If
End Sub

Sub CreateDirectory(path As String)
    path = GetLocalPath(path)
End Sub

Sub SaveReport(reportName As String)
    Dim reportDefinition As Byte()
    Dim document As New System.Xml.XmlDocument()
    reportDefinition = rs.GetReportDefinition(reportName)
    Dim stream As New MemoryStream(reportDefinition)
    document.Save(GetLocalPath(reportName) + ".rdl")
End Sub

Function GetLocalPath(rsPath As String) As String
    Return rootPath + rsPath.Replace("/", "\")
End Function

Save the code below as export.rss file, create a folder where the reports will be stored (e.g. C:\Reports) then run the RS.EXE command against your report server web service URL

rs.exe -i export.rss -s http://reportserver.domain.local/ReportServer -v rootPath="C:\Reports"

This will create all the reports in the .rdl format in the folder specified above

Monday, October 29, 2012

Windows Vault - SharePoint 2010

I have seen a problem where a user always prompts for a username and password when they are trying to open a SharePoint 2010 site. The credential dialog box has got the username field as READ ONLY.

The reason for the prompt is that the username for unknown reason is wrong and cannot be changed!

If you check the security event log, you will see Event ID 4648

To fix this problem you need to check the Windows Credential Manager, start it from the CMD

control /name Microsoft.CredentialManager

and remove the wrongly assigned credential to the site

Friday, October 26, 2012

Cisco ASA on GNS3

I was planning to design our existing ASA firewalls that are currently running independently to be active/active firewall running on multiple contexts.

I need a test lab for this. I use GNS3 for this.

I also need the ASA image and kernel files to be loaded in GNS3. Those files can be found from here
Once you got those files, you need to configure Qemu with the following options:

Qemu Options: -vnc none -vga none -m 1024 -icount auto -hdachs 980,16,32
Kernel cmd line: -append ide_generic.probe_mask=0x01 ide_core.chs=0.0:980,16,32 auto nousb console=ttyS0,9600 bigphysarea=65536

Also make sure you select the correct Initrd and Kernel files you downloaded earlier

You can now be able to start any ASA instance you have and when you do that, load the following keys:
activation-key 0x4a3ec071 0x0d86fbf6 0x7cb1bc48 0x8b48b8b0 0xf317c0b5
activation-key 0xb23bcf4a 0x1c713b4f 0x7d53bcbc 0xc4f8d09c 0x0e24c6b6

Wednesday, September 26, 2012

Cisco 4500 Series Switch Software Upgrade

Just got a pair of Cisco 4500 series switches with dual sup 7E. Needed to be upgraded to the latest IOS version.

Here are the steps to upgrade it:

  • Copy the .bin file from the TFTP server to both Sups (Active and Standby)
          copy source_device:source_filename bootflash:target_filename
          copy source_device:source_filename slavebootflash:target_filename
  • Change the boot system command
    no boot system flash bootflash:c6msfc2-jsv-mz.121-8a.E5
    wr mem

    boot system flash bootflash:c6msfc2-jsv-mz.121-8a.E6
    wr mem

  • Change the config register
    config-register 0x2102
    wr mem

  • Reload the Standby Sup
          redundancy reload peer
  • Failover the Sup
          redundancy force-switchover

Sunday, August 05, 2012

App-V SQL Move Error 0000C800

Recently I just moved App-V SQL Database from one to the other. I use the following procedures:


However, when trying to open the management console, I got the error code: 0000C800
One of the troubleshooting I have done was changing the UDL file and test connection was working, however the error persists.

It ended up I have to do the followings:

  • Open the SftMgmt.udl file from the Notepad
  • Copy the content of the file
  • Rename the SftMgmt.udl file to SftMgmt.udl.old
  • Create a new file using Notepad
  • Paste the connection string to the newly created file and modify the connection string to use the new SQL name
  • Save as the file to SftMgmt.udl
  • DO NOT open this newly created file. Try to open the management console again, if that works, job is done!

Monday, July 16, 2012

SharePoint 2010 Version Number

Here is one handy command to get your SharePoint 2010 version number:


Tuesday, June 19, 2012

Officially VCP 5 Today!

Just passed VCP510 exam today, yay!
Pretty difficult compare to the other exams


Friday, June 15, 2012

Exchange 2010 Distribution List Owner

I have been migrating user mailboxes from Exchange 2007 to Exchange 2010 lately. Apparently a user who has got the manage rights to a distribution list in Exchange 2007, might not be able to manage their DL anymore once his/her mailbox has been migrated to the Exchange 2010.

This is by design. Exchange 2010 by default does not allow individual users to create, modify, remove and add members to distribution groups they own

The user will get access denied if they were trying to add/remove a user from the DL they were managing. To fix this, you can tick the check box from the RBAC User Editor/Default Role Assignment Policy. However as you can see in the description of this option, it will also grant the user to add and delete the DL by them self.

If we were only want to enable them to only manage the DL their own, you need to use the following PowerShell script:

# Script for creating a Role that can manage distributions groups but can't create new ones 
# The sample scripts are not supported under any Microsoft standard support  
# program or service. The sample scripts are provided AS IS without warranty  
# of any kind. Microsoft further disclaims all implied warranties including, without  
# limitation, any implied warranties of merchantability or of fitness for a particular  
# purpose. The entire risk arising out of the use or performance of the sample scripts  
# and documentation remains with you. In no event shall Microsoft, its authors, or  
# anyone else involved in the creation, production, or delivery of the scripts be liable  
# for any damages whatsoever (including, without limitation, damages for loss of business  
# profits, business interruption, loss of business information, or other pecuniary loss)  
# arising out of the use of or inability to use the sample scripts or documentation,  
# even if Microsoft has been advised of the possibility of such damages 
# Written by Matthew Byrd 
# Matbyrd@microsoft.com 
# Last Updated 10.15.09 
# Parameter to get a different name than default for the new Role 
Param([string]$name="MyDistributionGroupsManagement",[string]$policy="Default Role Assignment Policy",[switch]$creategroup,[switch]$removegroup) 
# Help Function 
Function Show-Help { 
This script is will create or manage a management role designed to allow users to modify groups that they already own 
but not create or remove any new distribution groups. 
-name           Name of the managment role you want to create or modify 
                    Defaults to: `"MyDistributionGroupsManagmenet`" 
-policy         Name of the Role Policy you want to assign the role to 
                    Defaults to: `"Default Role Assignement Policy`" 
-creategroup    Adds or Removes the ability of the Role to Create DLs 
-removegroup    Adds or Removes the ability of the Role to Remove DLs 
This will Use the default names and Policy and will create a role that cannot 
Create or remove groups but can still modify them.  If the role already exists 
It will modify it by removing or adding the abiltity to create and remove groups 
based on the current state. 
Manage-GroupManagementRole -CreateGroup -RemoveGroup 
# Function to modify a role by removing or adding Role Entries 
# If no action is passed we assume remove 
# $roleentry should be in the form Role\Roleentry e.g. MyRole\New-DistributionGroup 
Function ModifyRole { 
    Switch ($action){ 
        Add {Add-ManagementRoleEntry $roleenty -confirm:$false} 
        Remove {Remove-ManagementRoleEntry $roleenty -confirm:$false} 
        Default {Remove-ManagementRoleEntry $roleenty -confirm:$false} 
If (($creategroup -eq $false) -and ($removegroup -eq $false)){ 
# Test if we have a role that already has that name 
If (([bool](Get-Managementrole $name -erroraction Silentlycontinue)) -eq $true){ 
    Write-Warning "Found a Role with Name: $name" 
    Write-Warning "Trying to Modify Existing Role" 
Else { 
    # Create the new Management Role 
    Write-Host "Creating Managmenet Role $name" 
    New-ManagementRole -name $name -parent MyDistributionGroups 
# Determine if we have the New and Remove Role Entries on the Role Already 
$create = [bool](Get-managementroleentry $name\New-DistributionGroup -erroraction Silentlycontinue) 
$remove = [bool](Get-managementroleentry $name\Remove-DistributionGroup -erroraction Silentlycontinue) 
# If we have the switch CreateGroup add or remove the RoleEntry for New-DistributionGroup 
If ($creategroup -eq $true){ 
    If ($create -eq $true){ModifyRole $name\New-DistributionGroup Remove;Write-Host "Removing ability to create distribution Groups from $name"} 
    elseif ($create -eq $false) {ModifyRole $name\New-DistributionGroup Add;Write-Host "Adding ability to create distribution Groups to $name"} 
# If we have the switch RemoveGroup add or remove the RoleEntry for New-DistributionGroup 
If ($removegroup -eq $true){ 
    If ($remove -eq $true){ModifyRole $name\Remove-DistributionGroup Remove;Write-Host "Removing ability to create distribution Groups from $name"} 
    elseif ($remove -eq $false) {ModifyRole $name\Remove-DistributionGroup Add;Write-Host "Adding ability to create distribution Groups to $name"} 
# Test if we have the assignment for the Role and Policy 
# If we do ... write a warning 
# If not create a new assignment 
If (([bool](get-managementroleassignment $name-$policy -erroraction SilentlyContinue)) -eq $true){ 
    Write-Warning "Found Existing Role Assignment: $name-$policy" 
    Write-Warning "Making no modifications to Role Assignments" 
Else { 
    # Assign the Role to the Role Policy 
    Write-Host "Creating Managmenet Role Assignment $name-$policy" 
    New-ManagementRoleAssignment -name ($name + "-" + $policy) -role $name -policy $policy 

Save the code to as MyDistributionGroupsManagement.ps1 file
Run the script:

MyDistributionGroupsManagement.ps1 -creategroup -removegroup

The script is basically create another role as a child role of the MyDistributionGroups and remove the ability to create and remove DL.
Once you have run the script, you will have the following Role:

Thanks to MS Exchange Team to share the script here

Wednesday, May 30, 2012

Netbackup Skipping Backup ID

Using Netbackup 7.5, recently we encountered the following error:

no images were successfully processed (191)


found no images or media matching the selection criteria (190)

and if you do "Search Now" in the Catalog with Action: Verify, you will get the following error:

To fix this issue, run the following command:

bpexpdate -backupid XXXXX_1338296403 -d 0 -force

this will force the problematic backup id to expire

Monday, May 28, 2012

ESXi 5 Install Offline Bundle

To install the ESXi 5 host with the Offline Bundle:

  • Download the ISO file from VMware
  • Extract the ISO file and find the offline-bundle ZIP file
  • SCP this ZIP file to the ESXi host (e.g. /tmp/driver.zip)
  • Run the following command

esxcli software vib install -d /tmp/offline-bundle.zip


Saturday, May 26, 2012

iPhoto Backup

I am using iPhone and taking photos with it. As you know it imports the photos automatically to the iPhoto when it is connected to the OSX. I created the following bash script to mount the Windows file share and copy the photos to the Windows Server

mount -t smbfs //username:password@windowsserver/pictures /Users/laurence/Mount
rsync -urz /Users/laurence/Pictures/iPhoto\ Library/Masters /Users/laurence/Mount/iPhoto
umount /Users/laurence/Mount

Tuesday, May 22, 2012

Exchange ExMon

Exchange ExMon tool is an awesome tool! by using this tool, for each user session, you can view
  • Number of packets
  • Number of operations
  • CPU Time
  • CPU %
  • Avg and Max Server latency
  • Bytes In and Out
  • Client Version and IP Address
  • Read, PreRead and Dirtied Pages
  • Log Bytes
The Log Bytes information is particularly very helpful if you want to find out who is filling up your Exchange Server Logs

The program can be downloaded from here

Sometime when you run it, it crashes :) and if you try to run it again, you will get the following error:

Then you should do the followings:

Open the Command Prompt and type in:

logman query -ets

As you can see in the picture above, the last line is: Exchange Event Trace
You need to stop this trace, by typing:

logman stop "Exchange Event Trace" -ets

Then you can run the ExMon again.


Monday, May 21, 2012

Exchange 2010 Recovery

Recently I had to recover my Exchange 2010 Servers. One of them was the Mailbox server role part of the DAG and the other one was the CAS, Hub and UM server. Those 2 servers were totally gone, unrecoverable due to RAID controller failure

CAS + Hub + UM Server Recovery

  • Build the server, Windows 2008 R2 SP1, name it EXACTLY the same name with the failed server name
  • Add all the Windows Server role + features required for CAS+Hub+UM
  • Patch it
  • Join to the domain
  • Extract the Exchange 2010 SP2 to the temp directory (e.g. C:\temp)
  • Run setup.com /m:RecoverServer
  • Reboot and check the configuration
Mailbox Server Recovery
  • Build the server, Windows 2008 R2 SP1 (Enterprise), name it EXACTLY the same name with the failed server
  • Add the Windows Server role + features required for Mailbox role
  • Patch it
  • Join to the domain
  • Remove the database copy from this failure Mailbox server (e.g. do this from the running Exchange 2010 Server)
Remove-MailboxDatabaseCopy DB1\MBX1
  • Remove the failed server's configuration from the DAG
Remove-DatabaseAvailabilityGroupServer -Identity DAG1 -MailboxServer MBX1 -ConfigurationOnly
  • Extract the Exchange 2010 SP2 to the temp directory (e.g. C:\temp)
  • Run setup.com /m:RecoverServer
  • Reboot
  • Add the server back to the DAG
Add-DatabaseAvailabilityGroupServer -Identity DAG1 -MailboxServer MBX1
  • Add the database copy
Add-MailboxDatabaseCopy -Identity DB1 -MailboxServer MBX1

Saturday, April 21, 2012

Trixbox + CUCM + Exchange UM + SP3102 + SRP527W Part 1

I have setup the voice network @home as per below picture

As you can see, there are a lot of SIP trunks between them. I will try to put the configuration for each of them

Exchange UM - CUCM

For Exchange UM and CUCM connection configuration, just follow the document published by Microsoft: http://www.microsoft.com/download/en/details.aspx?id=13591

The following is the CUCM Media Resource Group

The following is the CUCM Media Resource Group List

The following is the CUCM Configuration for the SIP Trunk to Exchange UM (e.g. mx01.domain.local), use the Media Resource Group List created above

CUCM - Trixbox

Create a new SIP Trunk Security Profile

Create a SIP trunk from CUCM to Trixbox, use the SIP Trunk Security Profile created above

Create a new Route Group

Create a new Route List

Create a new Route Pattern

I have extension 1499 and 1500 for Exchange UM Pilot and Auto Attendant respectively

I created a Route Pattern for default route to Trixbox when dial starts with 9. I also do exactly the same Route Pattern to the default route when dial starts with 0. The purpose for this is to use VOIP when dial with 9 and to use PSTN when dial with 0 first (configuration later on Trixbox)

Trixbox - CUCM

To be continue...

Thursday, April 12, 2012

NetScaler MAC Based Forwarding

In the situation where you have deployed your NetScaler with 2 NICs, one connected to the DMZ network and the other one is connected to your Internal network, depending on your configuration, you might need to enable the MAC Based Forwarding on NetScaler

You probably assign the NSIP on your Internal Network, MIP on your Intenal Network, SNIP and VIPs on your DMZ Network (for example for publishing CAG/SSL VPN). You then trying to access your NetScaler services from your Internal Network. This means your traffic from the Internal network goes to your default gateway (e.g. the firewall) which then forwarded to the VIP on DMZ Network. NetScaler then accept the traffic, however, the returning traffic will not going back to through the firewall (e.g. NetScaler default gateway), it will be going to the other NetScaler's NIC that connects to Internal network. This will create asymmetric routing, and most router/firewall will drop the packets.

To avoid this, usually enabling the MAC Based Forwarding (MBF) will fix this.

The following is the definition of MBF:

With MAC-based forwarding (MBF) enabled, when a request reaches the NetScaler appliance, the appliance remembers the source MAC address of the frame and uses it as the destination MAC address for the resulting replies. MAC-based forwarding can be used to avoid multiple-route/ARP lookups and to avoid asymmetrical packet flows. MAC-based forwarding may be required when the NetScaler is connected to multiple stateful devices, such as VPNs or firewalls, because it ensures that the return traffic is sent to the same device that the initial traffic came from.

To enable it, from the NetScaler Console:

enable ns mode mbf

Wednesday, April 11, 2012

XenServer 6.0 Kill Dead VM

Sometime when you try to restart or shutdown the VM, its status get stuck with the yellow status on XenCenter.

To forcely kill that VM:
  •  Login to the XenServer console where the VM is hosted
  • Get the VM Dom ID 
xe vm-list name-label={VM Name} params=dom-id
  • Get the list of live domains and see if the Domain ID of your VM is listed there
  • If your Domain ID VM is there, run the killing script
/opt/xensource/debug/destroy_domain -domid <dom id>
  • Do another list_domain to check the Dom ID is gone
  • Reset the power state of that VM
xe vm-reset-powerstate vm={VM Name} force=true
  • If that still does not work do

SharePoint 2010 - Get Logged In User Details

To get the user details using JavaScript from SharePoint 2010, use the following code:

the SP.JS file should be available from the standard installation folder of SharePoint 2010

Sunday, April 08, 2012

FreeNAS 8 and Time Machine

I have just finished setting up the FreeNAS 8 on Hyper-V to backup my MAC using Time Machine.

Tricky bits settings up FreeNAS 8 on Hyper-V:

  • Remove the default NIC when creating VM
  • Add a new NIC, must be legacy NIC
  • FreeNAS 8 does not recognize SCSI disks, only IDE
  • After installed, change the IP to static
  • do: ifconfig to find out the adapter name
  • do: ifconfig down
  • do: ifconfig up

Once the FreeNAS is up and running, go to its web console:
  • Create a group called: backup-group
  • Create a user called: backup-user, with primary group ID: backup-group, enter the password
  • Go to Services, enable AFP
  • Go to AFP Settings, make sure Local Access is ticked
  • Go to Storage, and Create ZFS Data Set, called backup-apple
  • Once it is created, edit its permissions, make sure owner-user is changed to backup-user and owner-group is changed to backup-group. Tick the option to have the Group the write access
  • Go to Share, add Apple Share. Name it backup, path: /mnt/data/backup-apple. Make sure the Disk Discovery is ticked, Disk Discovery Mode is set to Time Machine
From my MAC, start Finder:
  • Click Go, and select Connect to Server
  • Enter Server Address: afp://freenas-ip
  • It will ask you for the username: backup-user, password: password
  • Start Console, type:defaults write com.apple.systempreferences TMShowUnsupportedNetworkVolumes 1
  • Start Time Machine and Select Disk, select the backup

Thanks for reading :)

Tuesday, April 03, 2012

Exchange 2010 SP2 Upgrade

Just done my Exchange 2010 upgrade to SP2, which includes the following steps:
  • Login to Active Directory Server which holds schema master, as schema master and enterprise admin user, and run: setup.com /ps and setup.com /p
  • Upgrade all the Hub/CAS
  • Upgrade all the UM
  • Upgrade all Mailbox Servers:
  1. Enable maintenance mode on the DAG of the server to be upgraded:

.\StartDagServerMaintenance.ps1 -server server1

  1. Upgrade to SP2
  2. Disable maintenance mode

.\StopDagServerMaintenance.ps1 -server server1

Thursday, March 08, 2012

Sharepoint 2007 Access User Profile

To access user profile details from a page within SharePoint, you need the following:

Download the latest jQuery SPServices JavaScript from here
Upload the JavaScript to your SharePoint site
Add a Content Editor Web Part to the page
Edit the Content Editor Web Part, include the following:

The userName and Email have got the value of the logged on user

Sunday, January 22, 2012

Passed Citrix XenServer 5.6 Exam

Yay! today I passed 1Y0-024 Citrix XenServer 5.6 Exam - 2 more to go to get the CCEE for Virtualization

Tuesday, January 10, 2012

ESXi 4.1 NIC Driver Update

To update the ESXi 4.1 host with the latest NIC driver

  • Download the ISO file from VMware
  • Extract the ISO file and find the offline-bundle ZIP file
  • SCP this ZIP file to the ESXi host (e.g. /tmp/driver.zip)
  • Run the following command

esxupdate –bundle=/tmp/driver.zip update