Entries Categorized as 'System Administration'

Accidental DoS during an intentional DoS

Date October 24, 2014

Funny, I remember always liking DOS as a kid... Anyway, on Tuesday, I took a day off, but ended up getting a call at home from my boss at 4:30pm or so. We were apparently causing a DoS attack, he said, and the upstream university had disabled our net connection. He was trying to conference […]

VM Creation Day - PowerShell and VMware Automation

Date October 17, 2014

I should have ordered balloons and streamers, because Monday was VM creation day on my VMware cluster. In addition to a 3-node production-licensed vSphere cluster, I run a 10-node cluster specifically for academic purposes. One of those purposes is building and maintaining classroom environments. A lot of professors maintain a server or two for their courses, […]

Nagios Config Howto Followup

Date September 16, 2014

One of the most widely read stories I've ever posted on this blog is my Nagios Configuration HowTo, where I explained how I set up my Nagios config at a former employer. I still think that it's a good layout to use if you're manually building Nagios configs. In my current position, we have a […]

Mount NFS share to multiple hosts in vSphere 5.5

Date September 14, 2014

One of the annoying parts of making sure that you can successfully migrate virtual resources across a vSphere datacenter is ensuring that networks and datastores are not only available everywhere, but also named identically. I inherited a system that was pretty much manually administered, without scripts. I've built a small powershell script to make sure […]

Impossible problems are the best

Date September 11, 2014

"I can't believe that!" said Alice. "Can't you?" the Queen said in a pitying tone. "Try again: draw a long breath, and shut your eyes." Alice laughed. "There's no use trying," she said: "one can't believe impossible things." "I daresay you haven't had much practice," said the Queen. "When I was your age, I always […]

Monitoring (old) Zimbra

Date September 6, 2014

It's September, and in universities, that means tons of new people. New staff, new faculty, new students. Lots and lots of new people. Here at The College of Computer and Information Science at Northeastern University, we've got a banner crop of incoming CS students. So many, in fact, that we bumped up against one of […]