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Emile Aben

Location: Amsterdam, NL

I'm a system architect/research coordinator at the RIPE NCC, where I work in the science group. I'm a chemist by training, but have been working since 1998 on Internet related things, as a sysadmin, security consultant, web developer and researcher. I am interested in technology changes (like IPv6 deployment), Internet measurement, data analysis, data visualisation, sustainability and security. I'd like to bring research and operations closer together, ie. do research that is operationally relevant. When I'm not working I like to make music (electric guitar, bass and drums), do sports (swimming, (inline) skating, bouldering, soccer), and try to be a good parent.

Pages created by Emile Aben

Hampering Eyeballs - Observations on Two "Happy Eyeballs" Implementations
Emile Aben — 12 Nov 2011

In this article we look at two "Happy Eyeballs" implementations, that aim to reduce degraded user experience as the result of broken dual-stack configurations. We call this degraded user experience "Unhappy Eyeballs". The Chrome web browser implementation seems to succeed in this aim, while Apple's Mac OS X Lion operating system only partially succeeds in avoiding "Unhappy Eyeballs". Furthermore we show that Mac OS X Lion, in combination with the Safari web browser results in "Happy Eyeballs", but leaves well performing native IPv6 capacity unused in roughly half of the cases we measured, a condition we name "Hampering Eyeballs".… Read more

Tags: ipv6
F-root IPv6 Route Leak - the DNSMON View
F-root IPv6 Route Leak - the DNSMON View
Emile Aben — 03 Oct 2011

This weekend the NANOG mailing list was abuzz about an F-root IPv6 route leak, that resulted in the F-root DNS server instance located in Bejing, China, being queried from outside of China. This normally doesn't happen, as this instance is advertised with the BGP attribute NO_EXPORT, which means it should not be visible outside of immediate neighbor Autonomous Systems (ASes). We looked at the DNSMON data about this event, and found that 5 out of 29 IPv6-enabled DNSMON monitors saw the Bejing F-root instance. We also found there was an earlier leak on 29-30 September.… Read more

RIPE NCC Active Measurements Of World IPv6 Day Dataset
Emile Aben — 18 Jul 2011

As part of our Data Repository we released a new dataset. This dataset contains DNS lookups (A+AAAA), ping/ping6, traceroute/traceroute6 and HTTP fetches (IPv4/IPv6) from 40 vantage points (TTM, CAIDA Ark, and others), to 53 web sites involved in World IPv6 Day. The data covers the period from 2011-06-01T00:00 to 2011-06-13T00:00 UTC.… Read more

Tags: ipv6day ipv6