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How-to articles, industry news, opinions, analysis, and career advice for network engineers and anyone else who likes to keep up with the packet zeitgeist.
RSSSometimes a painfully troublesome networking problem can have a complicated and brain-twisting root cause, one which you dread having to explain to peers and managers. However, sometimes the root cause…
READ MOREWhen parsing Apache web server logs on Linux, I find it interesting to monitor access requests resulting in HTTP status codes other than 200s. An HTTP status code in the…
READ MOREIf there’s an IPv6 netblock you’d like your host to stop responding to, one tactic is to blackhole the traffic. That is, send any traffic from your host destined to…
READ MOREIf you’re using CLI tool curl to retrieve data from a remote API, you might send forth a command like so. curl -H "Authorization: Bearer access_token_goes_here" \ https://api.provider.com/thing/you_want/index.json That results…
READ MOREBy default, the Ubuntu installer leaves almost half your disk space unusable by the root file system. Here’s how to extend the partition on your default Ubuntu LVM space.
READ MORECisco Nexus switches are running Linux under the hood for a while, but until Nexus 9K and updated code for Nexus 3K it was not easily accessible. It has changed…
READ MOREJuniper's OpenContrail and AT&T's dNOS projects have joined the Linux Foundation and gotten new names. Should you care? Yes, a little bit.
READ MOREI’ve recently been working on an implementation of Virtual Router Redundancy Protocol (VRRP) on Linux using Keepalived to provide IP redundancy for some HA Proxy load balancers. I’ve been pleasantly surprised by…
READ MORESo, what can you configure with a network interface using udev, all in one place, with a single configuration file, across multiple distributions?
READ MOREIt came to my attention and I was rather surprised to learn a while back that the Linux ifconfig command has been deprecated for quite some time by the Linux…
READ MORESo, I ended my last blog post with a wish – “hopefully someday I can get a real switch running Cumulus to play with ;-)” Well, as it turns out,…
READ MOREAnybody annoyed enough with massive NTP monlist floods over the weekend? If you did like I did, I believe what immediately came to your mind was, “this shouldn’t have happened…
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