Entries Categorized as 'Networking'

Annoying pfSense Issue with 2.15 -> 2.2 Upgrade

Date March 3, 2015

I run several pfSense boxes throughout my network. Although the platform doesn't have an API, and it can be a pain to configure manually in certain cases, it's generally very reliable once running, and because it's essentially a skinned BSD, it's very easy on resources. There's also a really nice self-update feature that I use […]

VLAN Translation on a Nexus 5548 - :Sad Trombone:

Date February 23, 2015

I've got a problem. Our school is expanding, and we're constantly hiring people. We're hiring so many people that they won't actually fit in the building we're in. Because of that, we're having to expand outside of the building we've been in for years. Part of that expansion is extending my networks across campus (and […]

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, […]

Ubuntu and SNMP

Date August 21, 2014

After running Ubuntu for about two years now, I have a laundry list of complaints. Whether Ubuntu is automagically starting daemons that I install, or the relative difficulty of running an internal repo, or (and I'm heartily agreeing with my coworker Nick here) that it doesn't actually include a firewall out of the box....there are […]

Fun lesson on VRRP on Nexus

Date April 8, 2014

I'm in the middle of migrating our upstream links from the old 6500 core to the new Nexus switches, and I discovered something fun today that I thought I'd share. Before, since I only had a single switch, each of my subnets had a VLAN interface which had the IP address of the gateway applied, […]