Blog & Tutorials

Virtualization blog featuring my home virtualization lab, tutorials, network topology and configuration guides in the virtualized environments.

Email Server Generates “#500 Firewall Error##” Error

We upgraded our mail server recently to Microsoft Exchange 2007 and users started experiencing problem sending emails to multiple recipients on same domain. The error...

Adaptec RAID Card Array Status using SSH

I recently moved to new dedicated server and turns out that the server is equipped with Adapted RAID Card. The server has linux CentOS...

Firewall, NAT and DNS, reverse DNS entries do not match Error

If you host your own email behind a NAT device or firewall, you've probably seen this issue come up at least once in your...

Office Communications Server Front-End service terminated

We deployed Office Communications Server 2007 last year - a great communications tool to have within your enterprise. Few weeks ago, Microsoft released update...

Blog & Tutorials