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

  • Mikrotik Hotspot Ghost User Script
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    Mikrotik Hotspot Ghost User Script

    I had a customer show me a strange problem they were having with hotspot. They are doing MAC based authentication off of a usermanager server with 5 or 6 hotspots distributed out in their network. They have it limited down to one login per useraccount, which is normal. The problem is that they would occasionally…

  • My Waterpark – Part 2

    My Waterpark – Part 2

    So I’ve done a little more work. The long pipe here on the right is the feed to the dump bucket. It also has little holes drilled into the bottom of the pipe. This will make it spray down. Sprinkler head above the swing can be changed out to find just the right amount of…

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    Visio Stencils Mikrotik/Ubiquiti

    As you guys have noticed, I use Visio a lot…a LOT. Here are some stencils to make your diagrams oh-so pretty 🙂 Mikrotik Stencils Ubiquiti Stencils Thanks to JJ for the UBNT stencils 😉

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    Tracing DNS Servers With Dig

    For the people that like to see the hops that their DNS entries take, there is the trace option in Dig. If you are trying to diagnose DNS SOA issues with forward or reverse zones, this is a must! Forward traces: dig gregsowell.com +trace [root@dns2 ~]# dig gregsowell.com +trace ; <<>> DiG 9.2.4 <<>> gregsowell.com…

  • Configuring NTP Client On Callmanager 4.X
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    Configuring NTP Client On Callmanager 4.X

    CM 4.X doesn’t use the standard windows 2000 NTP client W32Time, it uses XNTP. To configure it, you edit a config file and restart the NTP service on the server. C:\WINNT\system32\drivers\etc\ntp.conf server 207.171.7.152 # Set Local Clock to Authoritive Time Source server 149.20.68.17 # Set Local Clock to Authoritive Time Source fudge 127.127.1.1 stratum 5…

  • Let Me Google That For You

    Let Me Google That For You

    A friend of mine turned me on to this site the other day. If someone asks you a question that could have simply been answered with a quick google, then browse to Let Me Google That For You. Type in the thing to be googled, and then it will produce a link for you. Email…

  • My Waterpark

    My Waterpark

    So it’s almost summer…and you can’t stay inside writing about routers allllll the time 😉 So my boys and I are going to build our own water park in the backyard. We started with some supplies. Gavin and I went to the hardware store today and picked up some junk: The plan is to attach…