it Articles


  • 2020-02-19
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AIR-LAP1142N-E-K9 to autonomous Mode Adventure

Some initial needful information Reset is done by holding MODE and then powering off and on the device Default enable password is Cisco Serial ttyUSB0 worked with one usb to rs232 and then a serial to RJ45 adapter, my cheapo ebay USB to rj45 did not work. The colors of …

  • 2020-02-06
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Quadra - Did You Play It?

In my youth I enjoyed the LANs. One fun game we played was Quadra - which is a multiplayer tetris where by playing the game you send more blocks to your opponents making it very stressful :D https://github.com/quadra-game/quadra turns out it is open source and it's out …

  • 2020-01-15
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Kringlecon 2019 Write-Up

The challenges! Hoe the season to be jolly! Been giving a few CTFs lately. It started with the disobey 2020 puzzle to get the hacker ticket. Then there was the OverTheWire's 2019 advent CTF. And finally this one, the SANS holiday hackmechallenge - KringleCon 2019. As of writing I got …

  • 2019-11-12
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Logging as a Service

Is there an open source thing out there I could use?? So if I only want to use mostly free and open source it there's a bunch of tools one need to glue together: These days I'd like to for primary ingestion have a BGP ECMP/anycast for rsyslog receivers …

  • 2019-07-22
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Contributing To OpenStack Upstream

Recently I had the pleasure of contributing upstream to the OpenStack project! A link to my merged patches: https://review.opendev.org/#/q/owner:+guldmyr+status:merged In a previous OpenStack summit (these days called OpenInfra Summits), (Vancouver 2018) I went there a few days early and attended the Upstream …

  • 2019-07-18
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Taking puppet-ghostbuster for a spin

We use puppet at $dayjob to configure OpenStack. I wanted to know if there's a lot of unused code in our manifests! **From left of stage enters: https://github.com/camptocamp/puppet-ghostbuster ** Step one is to install the puppet modules and gems and whatnot, this blog post was good about …

  • 2019-07-14
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Home Network Convergence

Finally got around to sorting out an issue which basically was that the TV+Chromecast near the TV was on another network than the media server and thus I couldn't stream videos by using my phone. I've been thinking lately and in previous posts that maybe I should just get …

  • 2019-05-30
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VLAN in the home network!

https://www.guldmyr.com/some-updates-to-the-home-network/ Above is a previous post in this series about some improvements to my home network. With two modems from two ISPs. So! On Alibaba I found two Hasivo 8x1GbE managed fanless switches with VLAN support. Delivery time to Finland was really quick. It didn't say …

  • 2019-05-15
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Some updates to the home network 1/2

Current layout: The corner: Cable MODEM NAT&WiFi ISP A One server One desktop who should be on both networks, default gw on one Phones and tablets wifi TV Area: DSL Modem NAT&WiFi ISP B One raspberry pi connected to the server Phones and tablets wifi One chromecast, would …