Network hardware

For a computer network to work

ArticlesPostsNewsAuthors

Pas Apr 8 at 19:02

A Tale of How Not to Turn Your Cisco Router into a Public DNS and NTP Server by Accident

Easy

6 min

995

Information Security*Cisco*Network hardwareSystem administration*

Tutorial

Translation

The Cisco IOS/IOS-XE operating system is a source of inspiration for many other vendors. The internet is full of guides on how to configure a typical Cisco router for SOHO scenarios. However, unlike consumer-grade routers, configuring something like Cisco IOS requires caution. If you don’t think things through, the router may start "living its own life" and end up, for instance, as a DDoS amplification tool.

Let’s dive in

Fotei Mar 25 2022 at 13:05

Traffic mirroring through HPE Virtual Connect

5 min

3.3K

IT Infrastructure*Network hardwareNetwork technologies*

From sandbox

In this article I'd like to describe different traffic mirroring options for HPE Virtual Connect modules. I try to answer two questions: "What options work and why?" and "How different traffic mirroring cases can be implemented?"

Shapelez Nov 9 2020 at 13:44

Linux Switchdev the Mellanox way

7 min

Qrator Labs corporate blogNetwork hardwareNetwork technologies*System administration*

This is a transcription of a talk that was presented at CSNOG 2020 — video is at the end of the page

Greetings! My name is Alexander Zubkov. I work at Qrator Labs, where we protect our customers against DDoS attacks and provide BGP analytics.

We started using Mellanox switches around 2 or 3 years ago. At the time we got acquainted with Switchdev in Linux and today I want to share with you our experience.

+18

Omrigan Nov 2 2019 at 12:38

Datacenter TCP explained

2 min

4.2K

Cloud computing*Network hardwareNetwork technologies*

Modern networking contains a number of improvements over the basic TCP/IP stack. One of this, particularly useful inside datacenter was developed by Microsoft Research in 2010 and called, surprisingly, DataCenter TCP (DCTCP).

DCTCP is a set of modification to TCP, targeting to fulfill two properties:
1. Improve latency for latency-sensitive small messages
2. Not to decrease the throughput for throughput-sensitive big flows