Networking • Automation • Occasional Podcasting
Inside Greg’s Brain

Networking gear, Ansible playbooks, and a podcast on the side.

Mikrotik tutorials, Ansible Automation Platform deep-dives, and conversations that chase the story behind the person.

Latest posts

  • Edit Ubiquiti Configs Via SSH
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    Edit Ubiquiti Configs Via SSH

    First things first, enable SSH access on your device. Some of the basic configs are easy to understand like the bridge connection and hostname…others not so much. The best thing to do is that if you can only gain SSH access to a remote device and aren’t able to connect via the web, then: Configure…

  • Computer Controlled Christmas Lights
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    Computer Controlled Christmas Lights

    You know it was inevitable…I can’t help myself. I already had a ck1610 serial relay controller…as well as an old junk laptop…so I married the two together for Christmas this year. This is a serially controlled 8 relay 2 opto-isolated input device. You throw a serial command at it and it will kick on a…

  • Ubiquiti Major Exploit AirOS v3.6.1/v4.0/v5.x

    Affected versions: 802.11 Products – AirOS v3.6.1/v4.0 (previous versions not affected) AirMax Products – AirOS v5.x (all versions) Updated versions are v4.0.1 – 802.11 ISP Products v5.3.5 – AirMax ISP Products v5.4.5 – AirSync Firmware Apparently there is a confirmed exploit that is installing botnet software on affected devices. If your devices are publicly accessible…

  • Google Maps For Cacti (GPS)
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    Google Maps For Cacti (GPS)

    This is a good option for WISPs that use Cacti. It basically gives you the ability to use google maps to place your devices. You can use the GPS coordinates to specify location information. Link is here.

  • Mikrotik V5.10-5.11 Rapid Fire Release

    What’s new in 5.11 (2011-Dec-12 11:05): *) hotspot – fixed https login (broken in v5.9); *) eoip: swap tunnel id bytes to be compatible with previous versions; *) eoip,gre: fix setting config What’s new in 5.10 (2011-Dec-09 11:49): *) snmp – provide extended interface statistics when availabe; *) dhcpv6 client – use link-scoped multicast address;…

  • Free Branch Circuit Monitoring(BCM) Collection And Billing
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    Free Branch Circuit Monitoring(BCM) Collection And Billing

    Branch Circuit Monitoring(BCM) is basically monitoring how much amperage is flowing through your electrical circuits. Every major electrical PDU/RPP vendor sells these. They have small current transformer(CT) rings that you run the hot side of your power through and then into the breaker. These BCMs generally have a Modbus interface. It is generally Modbus RTU,…

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    VM Failover With SAN Replication Across Multiple Datacenters

    This video and the included configs/diagrams show how to have failover with VM infrastructure/SAN replication in multiple datacenters. This basically leverages the power of BGP to move our public addressing. BGP is the ONLY choice to have addressing seamlessly migrate from one site to another…it is the protocol that the Internet happens to run on…