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Hyper-V on Windows 8 – Wireless Network Does Not Work

Thursday, 7. March 2013

I recently upgraded one of my laptops to Windows 8 and I noticed that it could run Hyper-V, so I enabled the Hyper-V feature and everything went smooth until I setup the Virtual Switch.  I set it up to use my wireless NIC and I left the check mark for “Allow management operating system to share this network adapter”.  Once it was done setting up the Network Bridge and the vEthernet interface I could no longer access the network.   Read more

Forefront Protection 2010 for Exchange Blocking winmail.dat

Thursday, 19. July 2012

When deploying Forefront Protection 2010 for Exchange and enabling file filter the majority if not all emails being sent and received had the body of the message replaced with:

FILE QUARANTINED

Microsoft Forefront Protection for Exchange Server removed a file since it was found to match a filter.
File name: “winmail.dat”
Filter name: “FILE FILTER= Blocked File Extensions: *” Read more

Create a CA

Saturday, 8. January 2011

I was tired of having all these invalid or untrusted certs on my network applications and devices so I decided to load up a CentOS box with OpenSSL and make my own Certificate Authority (CA).  See the steps after the jump. Read more

SQL 2008 R2 on Windows 7

Wednesday, 5. January 2011

I wanted to write a quick post about an issue that I ran into but could not find much information on.  When running SQL 2008 R2 Management Studio on Windows 7 x64 ( I have not tried on 32 bit) there are a couple of catches.

  • First one I ran into is the user must run the Management Studio as an administrator if they are in an active directory group that has been given access to a database because if Management Studio is not run as administrator then for some reason the users group information is not passed to the SQL server.
  • Second is when connecting to a SQL 2005 server the user is not able to update or delete tables in a database.  Creating a new table was not an issue it was just when modifying, updating or deleting an entry in a table or the entire table its self.  The user was set to owner of the database and was not apart of any group.

The first issue is a pretty easy fix but I have not found a fix for the 2nd issue.

Site Update

Thursday, 16. December 2010

I have finally decided to update WordPress for this site on my server and get everything going again.  Of course the template I was using doesn’t work on the new version of WordPress so I have spent the past couple of days looking at different templates but I have been having a hard time finding a good one.  I landed on this one because it is simple and it has what I need.  Let me know what you think of the new layout.

Thanks,
Brian

OpenFiler as Fiber Channel Target

Monday, 24. May 2010

I wanted to post my findings on how to use OpenFiler as a Fiber Channel SAN.  This process isn’t documented as well as I hoped it would have been but the forums on OpenFiler helped a lot but still were lacking.  This post will go from blank box to Fiber Channel LUN being presented by OpenFiler.  My goal was for a faster SAN as I was using iSCSI but it just didn’t meet my expectations.  For the SAN I am using a Qlogic QLA-2342 fiber card and a Brocade Silkworm 3200 fiber switch.

  1. Download the latest version of OpenFiler.  In this example I used 2.3.
  2. Install OpenFiler with out the fiber channel card installed.
  3. Once installed update OpenFiler using conary updateall.
  4. Reboot once the updates have completed and make sure everything is working ok.
  5. Shutdown the machine and install the fiber card.
  6. Get the WWN of the fiber card port(s) by showing the content of /sys/class/fc_host/hostX/port_name
    cat /sys/class/fc_host/hostX/port_name
    NOTE: X in hostX is the number of the adapter.  If there is more than one port check all WWNs.
  7. Edit /etc/init.d/scst and change the chkconfig to # chkconfig: –  99 36
  8. Have the scst server run on startup with chkconfig scst on
  9. Start the scst service.  service scst start
  10. Write the blank config to file with scstadmin –writeconfig /etc/scst.conf
  11. Create a logical volume for the LUN.
    1. This example we added a drive just for data /dev/sdb this will make prepare the drive to hold logical volumes for LUNs.  First get the geometry for the disk
      parted /dev/sdb print
    2. Label the partition
      parted /dev/sdb mklabel msdos
    3. Create the partition, 0.000 is the beginning and 1907328.000 is the end of the geometry from step 1
      parted /dev/sdb mkpart primary 0.000 1907328.000
    4. Enable lvm
      parted /dev/sdb set 1 lvm on
    5. Create the physical disk
      pvcreate /dev/sdb1
    6. Create the group, luns is the example name of the group
      vgcreate luns /dev/sdb1
    7. Create the logical volume, 50G is the size in GB, lun1 is the name of the logical volume and luns is the group
      lvcreate –L 50G –n lun1 luns
  12. Edit /etc/scst.conf.  vim /etc/scst.conf
    1. Under [TARGETS disable] move the HOST entries under [TARGETS enable].  NOTE: The HOST entry WWN should match the WWN(s) from step 6.
    2. Under  [HANDLER vdisk] add the logical volume created in step 11.
      DEVICE lun1,/dev/luns/lun1,WRITE_THROUGH,512
    3. Under [GROUP Default] add the USER WWN.  This is the server you want to be able to access the LUN.
      USER 21:00:00:1b:32:17:87:7e
    4. Under [ASSIGNMENT Default] add DEVICE then the device created in step 12.2 then the LUN number for the device.
      DEVICE lun1,0
  13. Edit modprobe.conf vim /etc/modprobe.conf and change qla2xxx to qla2x00tgt
  14. Reboot the OpenFiler machine and when it starts the LUN should be presented to the server.

HyperTerminal in Windows 7

Friday, 23. October 2009

I have talked to a lot of professionals and one of the big complaints about Windows 7 is the lack of HyperTerminal.  So here is how to get HyperTerminal on to Windows 7 (32 or 64-bit).

On the Windows 7 box make a new folder under C:\Program Files\HyperTerminal for 32-bit and for 64-bit make a new folder C:\Program Files (x86)\HyperTerminal

From a Windows XP box and copy the following 3 files to the folder that was just created on the Windows 7 box:

C:\Program Files\Windows NT\hypertrm.exe
C:\WINODWS\system32\hypertrm.dll
C:\WINODWS\Help\hypertrm.chm

Now just run hypertrm.exe and HyperTerminal is on Windows 7.

If you want to have HyperTerminal on your Start Menu just create a shortcut to hypertrm.exe and put it inC:\ProgramData\Microsoft\Windows\Start Menu\Programs and when you go to All Programs under the Start Menu HyperTerminal will be there.

The only issue that I have noticed is that when creating a connection the icons do not show, but in my opinion that is a non issue.

A quick side note if you have problems getting your USB to Serial connection working under Windows 7 try getting drivers from http://www.prolific.com.tw/eng/downloads.asp?ID=31.  The PL2303_Prolific_DriverInstaller_v10518.zip worked great for me.

XenServer – Change Bonding Mode

Thursday, 13. August 2009

By default XenServer 5.5 uses source-based ARP load balancing (balance-slb or mode 7) for bonding.  If this is needed to be changed to a different mode all that is needed to do is edit the file /opt/xensource/libexec/interface-reconfigure on line 863.  Do this using the following command:

vi /opt/xensource/libexec/interface-reconfigure +863

once there the value for mode can be changed from “balance-slb” to any supported mode.  Here is a list of the modes:

balance-rr
active-backup
balance-xor
broadcast
802.3ad
balance-tlb
balance-alb
balance-slb

See Linux Channel Bonding for more information on the types of bond modes.  Unfortunately I could not find much information on balance-slb.

To check if the bond mode change worked correctly run

cat /proc/net/bonding/bond<bondnumber>

Run ifconfig to find the bondnumber.

This will list the bond mode and the slave interfaces to the bond.

Setup NFS Server

Tuesday, 28. July 2009

This is based on CentOS but should be very similar for other distros as well.

If NFS is not installed install it

yum install nfs-utils

Have NFS start at startup

chkconfig nfs on

Create a directory to share

mkdir /nfs

Change the rights on the directory to allow users to create and delete data

chmod 777 /nfs

Edit /etc/exports to share the NFS directory

vim /etc/exports

add the following to allow the subnet 192.168.0.0 read/write access to /nfs

/nfs        192.168.0.0/24(rw)

Restart nfs service

service nfs restart

SSH Without A Password

Wednesday, 8. July 2009

SSH Without a Password

On the client generate a new rsa ssh key.

NOTE: When prompted for a passphrase leave blank (just hit enter).

ssh-keygen -t rsa

From the client append the new key to the servers .ssh/authorized_keys file.

cat ~/.ssh/id_rsa.pub | ssh root@hostname_or_ip ‘cat >> ~/.ssh/authorized_keys’

NOTE: Enter the root password on the server for the last time.

Now ssh into the server

ssh -l root hostname

It should log in without any prompt for a password.