Welcome to It-Slav.Net blog
Peter Andersson
peter@it-slav.net

I've already got a female to worry about. Her name is the Enterprise.
-- Kirk, "The Corbomite Maneuver", stardate 1514.0

Background As an increasing number of system administrators turn to mobile devices to access information on server and network status, the number of mobile security attacks are drastically increasing. op5 addresses the issues by introducing a secure mobile app, offering IT staff a convenient and safe path to mobile server monitoring.   Accessing your Nagios-based [...]

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Background As a happy owner of a pebble watch I want my op5 Monitor notifications to it. This is a simple guide howto get notifications sent directly tt a pebble watch. My phone is an Android and probably there is similar ways of getting it working on iphone aswell. The guide will work on Nagios [...]

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Background I wanted to have a LCD display on my desk showing the status of my monitor system. At the same time op5 created a competition with the coolest implementation of Raspberry PI and op5 Monitor. These things together made me getting started with my project. The result can be seen in this video  

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An howto that describe howto use irc as an alarm consol to nagios or op5 monitor

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Background I have a FON router which allow anyone to connect to Intenet via my network connection. I like the openess and idea behind FON but I do not want to get in trouble if someone do bad things and using my network connection. One solution is to connect the FON accesspoint to a separate network segment and let all [...]

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Background It really annoyed me that the iowait at the cpu on the Dom 0 system was approximatly 50% when the 4 virtual system was doing more or less nothing. I showed my earlier blogpost about VM virtualization to our sysadmin at op5. He gave me a couple of more hints that really make a [...]

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Background As an it slave, I have the same problems as most datacenters: Running out of space because of more and more machines get into the datacenter Overheating Powerconsumption Added to the "normal" datacenter problems, I also have to deal with: Wife acceptance Noice, my neighbours has complained about the noice outside my basement. To [...]

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01
Nov

 Nov 1, 2011. We are pleased to announce the official release of OpenBSD 5.0. This is our 30th release on CD-ROM (and 31th via FTP). We remain proud of OpenBSD’s record of more than ten years with only two remote holes in the default install.

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Filled Under: OpenBSD, sysadmin

My internet connection is a crappy ADSL line.   I noticed that I did get alot alerts from op5 Monitor complaining about high error rate on the external network. After some investigation I noticed that UDP port 5060 generated approx 1.5 Mbps in traffic and that is more or less maximum my ADSL connection can [...]

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Background My old NAS built on top of CentOS has some performence issues and the disks are quit old now. The hardware is leftovers that is approx 8 years old and not highend at that time either. The disks age has worried my for a time and I would like to have higher redunduncy with [...]

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Monitor the cloud with nagios or op5 monitor.

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05
Apr

Background It is very handy to have a temprobe attached to network devices like a Wlan router, if OpenWRT is installed it is easy to use 1-wire devices. By using this method it is possible to create wireless temperature probes that uses Wlan.  

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To be able to administrate my OpenWRT router from Internet I need to open the ssh port on the Wan interface.   It is real simple, just add to following to /etc/config/firewall: #open ssh on wan interface config rule                        option src              wan         option dest_port        22         option target           ACCEPT             option proto            tcp  And restart [...]

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Background After struggeling with my Linksys WRT-160NL to get OpenWRT stable I finally gave up. It ended upp with DD-WRT instead. Unfortunatly DD-WRT do not have the functionality I want like: -rndis device so I could use my Android phone to connect to Internet -1-wire device support -Nagios agent The solution was to buy another device where OpenWRT support [...]

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Presenting collected Nagios data has been cumbersome. But now with op5 added funtionality, storing the data in a database makes it much easier. Morten Bekkelund has created a nice dashboard typically used in NOCs. The dashboard has been modified and improved by the community and an example can be seen at op5 sandbox dashboard and [...]

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Background When I was preparing a presentation about what op5 is doing and our contribution to the community, I went to ideas.nagios.org. When I browsed the list of the biggest issues with Nagios I found out that op5 has packaged and solved them all in op5 Monitor. I encourage everyone to take a peak at the list [...]

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  We would like to meet with you on an op5 Inspiration Day in September. It will be a day with topics like IT operations, cloud monitoring, virtualization, outsourcing and how to get control of everything in an easy way. The most important thing is to meet and listen to other users, hear about the [...]

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  Background After waiting for the Hummingbird release for the LaFonera 2.0G a long time and discussed with the Fon support team when 3G dongles will work, I gave up and installed OpenWRT on my LaFonera 2.0G router.   I’m sorry FON, you have a cool idea and nice routers but your unlogical approach to the users [...]

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  Background After getting fedup with the bad fon support I decided to give a new wireless router a try. After browsing internet and openwrt forums I thought that a Linksys WRT160NL would fulfill my requirements: The requrements are: N 3G USB dongle Cheap  

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26
May

This is old news but still important.   – OpenBSD 4.7 RELEASED ————————————————- May 19, 2010. We are pleased to announce the official release of OpenBSD 4.7. This is our 27th release on CD-ROM (and 28th via FTP). We remain proud of OpenBSD’s record of more than ten years with only two remote holes in [...]

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  I’m the happay owner of a Huawei E1750 modem and it is real easy to get it running in Ubuntu. This guide will probably work with many other 3G USB modems. Just type from the command line: sudo apt-get install usb-modeswitch Plug in the modem Go to the Network manager and enter your Mobile Broadband [...]

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02
May

  I wanted to unlock my operator locked Huawei e1750 modem. After googling I found this page in swedish. The unlock code can be calculated by using the IMEI number, the unlock code is sent by using AT commands. I have succesfully tested this on e1750 and e1550. I also tried it on e220 and it did not work.

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Filled Under: english, Hints, sysadmin

UPDATE 2014-07-07: op5 has released a native mobile app that are secure and uses op5 Monitor APIs. Please read more at: http://www.it-slav.net/blogs/2014/07/07/op5-releases-mobile-app-for-secure-monitoring-on-mobile-devices/     With my new and fancy HTC Desire I wanted to look at my Nagios or op5 Monitor status. I have found two apps Nagroid and NagMonDroid.  

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Background I bought a Fonera 2.0g WLAN router and I wanted to extend the functionality to have the possibility to add packages from OpenWRT. I also wanted the possibility to manage my new router with ssh. The way to achive this is by installing developer firmware.

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My laptop and cellular phone has both Bluetooth and it has annoyed me for a while that I have not managed to get a working Internet connection using Bluetooth. I have only managed to get it working with a USB cable between my phone and laptop.   After some Google search and reading of man pages [...]

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