Archive for June, 2010

Adding Sender Blacklist in Forefront for Exchange 2007

Wednesday, June 30th, 2010

To add a sender blocking list to Exchange 2007 protected by Forefront, you will need to perform the following actions under “Exchange Management Console”

– Open Organization Configuration
– Hub Transport
– Anti-spam
– Sender Filtering
– Properties
– Add the email address or the domain you want to block.

Data Center Tiering

Wednesday, June 9th, 2010

When we evaluate datacenter quality, often time, we will look at datacenter tiering. Below is the table describes various Datacenter Tiers.

Tier 1
Has non-redundant capacity components and a single, non-redundant distribution path serving the computer equipment

Tier 2
Has redundant capacity components and a single, non-redundant distribution path serving the computer equipment.

Tier 3
(a) Has redundant capacity components and multiple independent distribution paths serving the computer equipment. Only one distribution path is required to serve the computer equipment at any time.
(b) All IT equipment is dual powered and installed properly to be compatible with the topology of the site’s architecture.

Tier 4
(a) Has multiple, independent, physically isolated systems that provide redundant capacity components and multiple, independent, diverse, active distribution paths simultaneously serving the computer equipment.
(b) All IT equipment is dual powered and installed properly to be compatible with the topology of the site’s architecture.
(c) Complementary systems and distribution paths must be physically isolated from one another (compartmentalized) to prevent any single event from simultaneously impacting both systems or distribution paths.
(d) Continuous cooling is required.

Running OSX on VMWare Fusion

Monday, June 7th, 2010

The following steps describe how you can install OS X on VMware Fusion.

sudo su –
cd “/Library/Application Support/VMware Fusion/isoimages”
mkdir original
mv *.sig original
mv darwin.iso original
sed “s/ServerVersion.plist/SystemVersion.plist/g” < original/darwin.iso > darwin.iso
openssl genrsa -out tools-priv.pem 2048
openssl rsa -in tools-priv.pem -pubout -pubout -out tools-key.pub
openssl dgst -sha1 -sign tools-priv.pem < darwin.iso > darwin.iso.sig
for A in *.iso ; do openssl dgst -sha1 -sign tools-priv.pem < $A > $A.sig ; done
exit