Chaos Computer Club - archive feed

BGP local-preference is one of the most powerful attributes, but naively used, it inevitably gets in the way, and creates avoidable troubles for other networks.

This talk shows a few commonly used variants and the unwanted consequences.

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about this event: https://pretalx.com/denog13/talk/RVC77F/

We'll run through a few Grafana developments you may have missed.

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about this event: https://pretalx.com/denog13/talk/VKJL98/

End of Day 1

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about this event: https://pretalx.com/denog13/talk/M9ETM3/

FTTH deployments and PONs (Passive Optical Networks) are coming up more often in discussions amongst network operators, and many times PON is used synonymous with inferior technology: only dark fiber is considered the one true solution.

As a network engineer with a strong Service Provider background, I can relate to this viewpoint, and while it is technically correct, the real world imposes financial, logistical and administrative restrictions on companies building and operating FTTH networks, thus making PON more beneficial for them.

This talk will give an overview of PON and PON designs (active and passive) and compares it with AONs (Active Optical Networks). Then it will show advantages and disadvantages of both technologies and give examples where one might choose one over the other technology.

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about this event: https://pretalx.com/denog13/talk/MTVATA/

Fast DNS resolvers are a crucial component in delivering a snappy internet experience for end-customers. If the resolvers are down or under heavy load, even the best internet connection is useless for most customers.

In this talk I'll cover how to design and set up a scalable, highly available DNS resolver infrastructure for internet service providers.

- Anycast IPs using BGP for horizontal scaling and high-availability

- Health checks

- Scaling nodes vertically to optimize cache ratios

- Automation is key

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about this event: https://pretalx.com/denog13/talk/PLT8NF/

Booking.com runs large parts of its infrastructure on on-premise L3 Clos networks of non-trivial sizes. This talk presents our in-house end-to-end monitoring system that checks and reports on the health of the network, and helps us in checking our SLOs, and an ad-hoc tool used to debug ECMP issues in these networks.

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about this event: https://pretalx.com/denog13/talk/NNHGVE/

I identified all the IPv4 allocations by RIPE NCC to Germany, and did a programmatic survey of the state of reverse DNS for this data. I present my findings and talk very briefly about the benefits to network operators of establishing PTR records for external-facing nodes.

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about this event: https://pretalx.com/denog13/talk/L7NAT9/

Tired of manually updating the ripe-db? What if the ripe-db is updated when you document your prefixes in netbox? Let's automate this on creation, update and deletion of objects. Dealing with corner cases such as overlapping prefixes is also covered. Backups included.

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about this event: https://pretalx.com/denog13/talk/MFFTL7/

In this presentation we will explore how Quantum Key Distribution (QKD) works and how it can be leveraged in existing security mechanisms. Before diving into QKD we will first look at some of the quantum terminology and principles. We will also explore what a Quantum Network and/or Quantum Internet is.

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about this event: https://pretalx.com/denog13/talk/7REQMS/

BNG Blaster - https://github.com/rtbrick/bngblaster

When we started to build and test our BNG software for open hardware platforms, we got increasingly frustrated with the abilities and test methodology of commercial network testing software. Most solutions come with a dedicated hardware chassis or VMs with high CPU and memory requirements. Commercial network testing software is often limited by strict licensing. When performing regression testing overnight on cloud servers we have a peak license use of hundreds of instances, which we do not need most of the day. Our reliability testing crew complains often about slow reconfiguration from one test scenario to the next. Reprogramming the network tester often takes an order of minutes before the test suite can be run but we want to start/stop a test within an order of seconds.

Therefore we decided to build an open source network test software initially focused on BNG and IPTV testing but constantly enhanced and planned for more common network equipment test cases.

The BNG Blaster is completely built from scratch targeted for max scaling with a small resource footprint, simple to use and easy to integrate in our test automation infrastructure. It is able to simulate more than hundred thousand PPPoE and IPoE subscribers including IPTV, L2TPv2, QoS, forwarding verification and convergence testing capabilities.

+ High Scaling: > 100K sessions

+ Low CPU and Memory Footprint: < 100MB memory for 16K sessions

+ Portable: runs on every modern linux, virtual machines and containers

+ User Space: all protocols are implemented in user-space from scratch and optimized for high performance

+ IPTV: IGMP version 1, 2 and 3 with automated channel zapping test

+ QoS: define and analyze traffic streams

Automation: the BNG Blaster Controller provides an automation friendly REST API and robot keywords

...

At RtBrick we already migrated all our testing to BNG Blaster which saved us more money on commercial network testers than spent on development for this software. We also received great feedback from GitHub users around the world using it. Therefore we will continue to sponsor this project with the target to form a large community of users and contributors.

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about this event: https://pretalx.com/denog13/talk/D8B3XJ/