Wow its a biggest disaster ever happened to wiki. Twitter already confirmed that its down. In Internet age peoples IQ is gone….god help uss….

Updated:
Due to an overheating problem in our European data center many of our servers turned off to protect themselves. As this impacted all Wikipedia and other projects access from European users, we were forced to move all user traffic to our Florida cluster, for which we have a standard quick failover procedure in place, that changes our DNS entries.

However, shortly after we did this failover switch, it turned out that this failover mechanism was now broken, causing the DNS resolution of Wikimedia sites to stop working globally. This problem was quickly resolved, but unfortunately it may take up to an hour before access is restored for everyone, due to caching effects.

We apologize for the inconvenience this has caused.
Source: http://techblog.wikimedia.org/2010/03/global-outage-cooling-failure-and-dns/

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Backing Up Exchange 2007 to Disk with NTBackup.exe

As you guys know, Backup is a main job a Administrator have. I have written few tutes on this subject here in my Blog and my website too. In this tute you will see how to backup Exchange 2007 to a disk using NTBackup.exe command (a simplest one MS can provide you).

Following steps to create a backup job for Exchange Server 2007 with NTBackup.exe:
1. Click Start | Run, type ntbackup.exe, and click OK.
2. Select the Advanced Mode link on the Splash screen (welcome page).
3. Click the Backup tab.
4. Expand Microsoft Exchange Server, expand an ” exchange_server_name “, and select the check box next to the storage group you want to back up.
5. Verify that path is in the in the Backup destination list.
6. In the Backup media or file name box, type the path and filename for this backup (for example, C:\MyJobSaverBackups\1stBackup).
7. On the Tools menu, click Options. Verify that the Default Backup Type is Normal and then click OK.
8. Click Start Backup, review the backup job information, and verify that the settings are appropriate.
9. Click Advanced, enable Verify data after backup, and click OK.
10. Click Start Backup.

THAT IT…YOU ARE DONE….

Adding IP Block List
An administrator can configure list of IP addresses that are known as sources of spam, malicious code/viruses or some untrustworthy sources.
To do this follow these steps:
1. Expand Server Configuration.
2. Select Hub Transport to display Hub Transport servers.
3. From the center panel, select the Hub Transport server to which you wish to add the IP address or range to be blocked.
4. Click the Anti-spam tab.
5. Select IP Block List.
6. From the Actions pane, click the Properties shortcut to display the properties pages (alternatively, right-click IP Block List to select Properties from the context-sensitive menu).
7. On the Blocked Addresses tab, click on the Add button.
8. You can also add a single IP address (for example, x.x.x.4) or a lists of IP addresses.
9. Also if you need you can set an expiration time for the entry. Connections from the IP address or range will be allowed after the expiration time. The dialog box displays the expiration time, if one is entered, and its current state—whether active or not.
10. Click OK twice to close the IP Block List properties.

Thats it, you are done…

Multilayered future of Exchange Server 2003 is enhanced in Exchange Server 2007. The included components are:

1. Connection Filtering agent,
2. Content Filter agent,
3. Sender ID agent,
4. Sender Filter agent,
5. Recipient Filter agent and
6. Protocol Analysis agent.

Anti-spam agents are installed on Exchange Server 2007 servers running the Edge Transport server role. These can be installed on Hub Transport servers using the installantispamagents.ps1 script. This can be found in the Scripts folder in the Exchange Server 2007 install
path (”C:\Program Files\Microsoft\Exchange Server\”).