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Posts in 2018

  • AS112 and BIRD

    Tuesday, March 06, 2018 in BGP

    AS112 provides an anycasted reverse DNS sink hole for the private addresses set aside in RFC1918 and RFC6890. Using BIRD to inject an AS112 instance into your own system is quick, easy, and painless! This is nearly identical to using exabgp, except …

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  • AS112 and Exabgp

    Tuesday, February 13, 2018 in BGP

    AS112 provides an anycasted reverse DNS sink hole for the private addresses set aside in RFC1918 and RFC6890. Using exabgp to inject an AS112 instance into your own system is quick, easy, and painless! Requirements BGP: your own autonomous system, …

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Posts in 2017

  • RabbitMQ - PSaaS

    Sunday, December 03, 2017 in Programming

    I wrote a small web application which I’m calling “PSaas” – Port Scan as a Service. This webapp was an opportunity for me to do some coding and interaction with RabbitMQ. RabbitMQ has come up a few times for me lately. First, …

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  • OSX Built-in TFTP Server

    Tuesday, November 28, 2017 in OSX

    OSX has a built-in TFTP server, but starting it the OSX way may not be 100% obvious to you. sudo launchctl load -F /System/Library/LaunchDaemons/tftp.plist sudo launchctl start com.apple.tftpd The default TFTP path is /private/tftpboot. Stopping it …

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  • Studying Canadian BGP

    Saturday, May 13, 2017 in BGP

    Over the past four or so years I’ve been researching BGP routing in Canada. My first interest in studying Canadian BGP came as a result of studying historical BGP hijacks. I talk about this during my BSidesWpg 2013 talk: The practical …

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  • HA Recursive DNS with dnsdist and exabgp

    Thursday, February 02, 2017 in DNS

    This is a fourth in blog series about DNS, specifically awesome things that can be done with dnsdist. This one was inspired by this blog post about exabgp and healthchecks, as well as this custom lua dnsdist load balancing policy. Routing, Front and …

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  • fpinglog

    Thursday, February 02, 2017 in Networking

    I’ve often wished for a way of logging pings when troubleshooting connectivity problems. Today I revisited the problem using fping. fping and fping6 both have options to run a continuous ping (-l), and when combined with -D to insert the unix …

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  • MikroTik, VRRP, and IPv6

    Thursday, January 19, 2017 in MikroTik

    I recently setup IPv6 first-hop redundancy in my colocated environment using MikroTik and VRRP. It didn’t work the same way I’d come to expect from using it in IPv4 environments and I set out to figure out why. Expectations My expecations …

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  • BGP BLACKHOLE Community

    Sunday, January 01, 2017 in BGP

    DDoS attacks continue to be a wide-spread problem on the internet. Their size has grown over the past few years to where BGP Blackholing to reduce collateral damage has become widespread. As more and more networks built support for BGP Blackholing …

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Posts in 2016

  • Large BGP Communities

    Sunday, September 04, 2016 in BGP

    One of the things I noticed when I received a 32-bit ASN was that I was unable to use my ASN in my BGP communities. I’m not the only one who has noticed this, and work has begun on a Draft Standard, Large BGP Community to address this …

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