Posts in 2016

  • Filtering with BGP Communities

    Friday, February 12, 2016 in BGP

    Otherwise known as Filtering BGP Advertisements Using BGP Communities For Fun and Profit but that made the layout terrible. Filtering BGP advertisements using communities is a simple and effective way to control your advertisements. This can prevent …

    Read more

Posts in 2015

  • 4 ASNs Disappear in Atomic Aggregate

    Saturday, October 31, 2015 in BGP

    On Sunday, September 13th, 2015 during the wee hours of the morning a change was made by AS7122 which silenced four Manitoban ASNs, and removed several other routes from the global routing table. Shortly after the start of their 1AM maintenance …

    Read more

  • Manitoban BGP Growth Rate Strong

    Sunday, October 11, 2015 in BGP

    The number of Manitoban networks running BGP since 2012 has doubled. The first AS number was registered in 1996, and growth was slow and steady up until 2012. In 2012 two Internet Exchanges were announced in Winnipeg. Since then, growth has sky …

    Read more

  • ASN Growth in Manitoba

    Sunday, March 08, 2015 in BGP

    I recently started maintaining this graph which shows the total number of AS Numbers in Manitoba. You will notice the dramatic increase in 2013 and 2014. When I tweeted the link to this graph, I got a reply back from Andree Toonk (of …

    Read more

Posts in 2014

  • Phased Service Moves

    Tuesday, November 25, 2014 in BGP

    This evening I successfully moved a second set of services from service provider IP space to BGP IP space. The first phase of this project began over a year ago – I turned up AS62758 in early December 2013 prior to the migration of a Learning …

    Read more

  • Major Internet Issues Today

    Tuesday, August 12, 2014 in BGP

    There has been a lot of noise in Canada on Twitter about the widespread network issues Shaw was experiencing, and also a lot of speculation about what the cause of those issues were. Simultaneously, the number of IPv4 routes advertised in the global …

    Read more

  • BGP Hijacking In News Again

    Sunday, August 10, 2014 in BGP

    Its been 4 months since I last wrote about global BGP hijacking, when Indosat advertised 320k prefixes. This time The Dell SecureWorks Counter Threat Unit has documented 51 hijacked more specific prefixes which were used along with overly trusting …

    Read more

  • OpenBSD 5.5 BGP Looking Glass

    Wednesday, May 14, 2014 in BGP

    I’ve written about OpenBSD and BGP Looking Glasses before. OpenBSD has since removed apache from base, and replaced it with nginx. This is OK with me since I prefer the simplicity and raw performance of nginx (and its ability to proxy!). This …

    Read more

  • Leaking Routes

    Sunday, May 04, 2014 in BGP

    The traceroute: $ tcptraceroute -q1 Selected device eth0, address 10.xx.xx.5, port 36975 for outgoing packets Tracing the path to ( on TCP port 80 (http), 30 hops max 1 10.xx.xx.254 0.399 ms 2 …

    Read more

  • exabgp: first lab

    Sunday, April 27, 2014 in BGP

    I have been doing a lot of reading about exabgp. exabgp is a python BGP implementation which doesn’t implement any host routing functionality at all, just transforms BGP messages into plain text or JSON which can be easily manipulate by …

    Read more