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Welcome to op5 tech news & blog


On this space we at op5 Tech will write about things that we encounter in our day-to-day work and it will of course be most about IT monitoring. But we will also write about interesting customer installations, what's on the Internets or whatever that we think might be of interest to our readers.
Happy reading!

 

 

 

Recent blogs

First quarter 2017 events
So what has been going on with community work lately? In this post I will try to boil down what has been happeing since my introduction post back in November. We've done some, and we would love to do more! I'll give you a brief overview what we have done the last 3-4 months, and If you have any feedback, don't hesitate to get in touch with us. Documentation & public communication I've Investigated how our communication, mainly on our web pages towards the community is today,…
Introduction I am very happy to announce that I've been offered the torch as OP5's new Open Source Community Manager (OSCM) and of course I gladly accepted this new challenge! This will be a part-time responsibility for me from my normal duties as a Support Engineer here at OP5. About me One does not simply introduce himself...But well, I'll do my best. My name is Fredrik Mikker and I have been working at OP5 for about five years in multiple departments.…
Foss North 2016
This is my notes in a simple list form and pictures from the Foss-north conference held in Gothenburg 2016-05-26. The meetup is arranged by the non-profit organization Foss North https://foss-north.se which is a joint venture between Foss GBG https://foss-gbg.se and Foss Sthlm https://foss-sthlm.se to create a larger meetup than the regular bi-monthly/quarterly meetings that Foss GBG arranges here in Gothenburg. In general the meetup was pretty good, well arranged,…
A few weeks ago we launched op5live.com http://www.op5live.com, an easy way to monitor your public web services and also to add an outside view / monitoring to your op5 Monitor - on premises. This is a SaaS service that we have built with Node.js, MongoDB using op5 Monitor in the back-end. All communication is done over the API to the backend core op5 systems. The service is hosted at City Networks with two datacenters so geographically separated, load balanced and in full sync with each other.…
Mosh - an alternative to ssh
SSH is a secure way to connect to remote systems that run Linux or any other Unix operating system. SSH is fast, secure and runs everywhere. Additionally, it supports secure and convenient authentication methods and tunneling of TCP connections, beside of much more. But there are also some problems with SSH. SSH sessions loose connection when your IP address changes. Also, when working on a slow network connection, SSH sessions can get pretty unresponsive and slow,…
Linux kernel update
A bug has been discovered in the Linux kernel, affecting most Linux-based systems. The impact on an APS system is primarily a risk of crashing the system, but theoretically it is possible to gain unauthorized access to the system. The bug is related to how the kernel handles netfilter.  A remote attacker could use this flaw to send a specially crafted DCCP packet to crash the system or, potentially, escalate their privileges on the system. (CVE-2014-2523 http://web.nvd.nist.gov/view/vuln/detail?…

 

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