The other night as I was getting ready to sleep, I received an email from the host of my personal Linux VPS saying that I had exceeded my monthly transfer quota. I didn’t pay much mind to the warning, as the excess transfer was insignificant, and at that time I was too tired to care. I closed my email, got into bed and fell asleep.
Author Archive
OpenBSD 4.6 on XenServer 5
Friday, March 12th, 2010
I’ve just been trying to set up an OpenBSD 4.6 VM on one of our XenServer machines, and found that it kept shutting itself down during boot after showing the message “nvram: invalid checksum”. After digging around online, I found a fix.
Subnet Representations and Aliases
Thursday, October 8th, 2009
Anybody who has manually configured their network settings has had to enter a subnet mask, usually in the form of “#.#.#.#”. The most familiar subnet value for many is 255.255.255.0, representing that the first three segments of the associated IP address must be the same as another IP address for the other address to match the subnet. The behaviour of this subnet is almost self-evident due to the syntax. However, this syntax can be misleading. What does a subnet of 255.240.0.0 mean? Or the subnet 255.192.0.0? And why is the subnet 255.127.0.0 invalid?
Diagnostic Tracing in Vantage
Tuesday, April 28th, 2009
Diagnostic Tracing is a way to find out the details of what Vantage does when performing a variety of actions such as importing logs, generating a report, and so on. Sometimes an error may occur during these actions, and the error presented to the user can often be cryptic and meaningless. Tracing shows the steps that led up to an error, and shows more detail about the error itself than the dialog presented to the user.
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