0

Ubuntu 18.04

Ubuntu 18.04 comes with Linux kernel version 4.15. This version of the kernel includes efficient in-kernel packet sampling that can be used to provide network visibility for production servers running network heavy workloads, see Berkeley Packet Filter (BPF).
This article provides instructions for installing and configuring the open source Host sFlow agent to remotely monitor servers using the industry standard sFlow protocol. The sFlow-RT real-time analyzer is used to demonstrate the capabilities of sFlow telemetry.

Find the latest Host sFlow version on the Host sFlow download page.

wget https://github.com/sflow/host-sflow/releases/download/v2.0.25-3/hsflowd-ubuntu18_2.0.25-3_amd64.deb
sudo dpkg -i hsflowd-ubuntu18_2.0.25-3_amd64.deb
sudo systemctl enable hsflowd

The above commands download and install the software.

sflow {
  collector { ip=10.0.0.30 }
  pcap { speed=1G-1T }
  tcp { }
  systemd { }
}

Edit the /etc/hsflowd.conf file. The above example sends sFlow to a collector at 10.0.0.30, enables packet sampling on all network adapters, adds TCP performance information, and exports metrics for Linux services. See Configuring Host sFlow for Linux for the complete set of configuration options.

sudo systemctl restart hsflowd

Restart the Host sFlow daemon to start streaming telemetry to Continue reading

0

Intra-Subnet Communication: AWS VPC versus LISP Based Campus Fabric

0

Top Beauty Networking Events in 2020

If you are in the beauty industry, then you are going to want to attend as many beauty networking events in 2020 as possible in order to make connections with other people in the field. Any beauty event, whether a trade show, a conference, or a demonstration can be used as a beauty networking event, since these events give you access to professionals in the field.

There are a number of different beauty networking events set for this year 2020, and each event can be a great way for you to meet and network with new people in the industry, learn about new makeup and skin care trends, and even learn about new makeup techniques – all of which can be helpful to your business.

Look for Beauty Networking Events Online

If you are looking for some beauty networking events near you, check online to find out where various beauty events will be held throughout the year. There are several events being held, and some offer better networking opportunities than others. You’ll need to decide for yourself which event will provide you with the networking opportunities you are looking for based on what type of beauty business you are Continue reading

0

Splunk Makes Security Hygiene Sexy Again

“Vulnerability management, configuration management, patch management — those things should...

Read More »

0

Protect your team with Cloudflare Gateway

On January 7th, we announced Cloudflare for Teams, a new way to protect organizations and their employees globally, without sacrificing performance. Cloudflare for Teams centers around two core products - Cloudflare Access and Cloudflare Gateway. Cloudflare Access is already available and used by thousands of teams around the world to secure internal applications. Cloudflare Gateway solves the other end of the problem by protecting those teams from security threats without sacrificing performance.

Today, we’re excited to announce new secure DNS filtering capabilities in Cloudflare Gateway. Cloudflare Gateway protects teams from threats like malware, phishing, ransomware, crypto-mining and other security threats. You can start using Cloudflare Gateway at dash.teams.cloudflare.com. Getting started takes less than five minutes.

Why Cloudflare Gateway?

We built Cloudflare Gateway to address key challenges our customers experience with managing and securing global networks. The root cause of these challenges is architecture and inability to scale. Legacy network security models solved problems in the 1990s, but teams have continued to attempt to force the Internet of the 2020s through them.

Historically, branch offices sent all of their Internet-bound traffic to one centralized data center at or  near corporate headquarters. Administrators configured that to make sure all Continue reading

0

Worth Reading: 10 Optimizations on Linear Search

Stumbled upon an article by Tom Limoncelli. He starts with a programming question (skip that) but then goes into an interesting discussion of what’s really important.

Being focused primarily on networking this is the bit I liked most (another case of Latency Matters):

I once observed a situation where a developer was complaining that an operation was very slow. His solution was to demand a faster machine. The sysadmin who investigated the issue found that the code was downloading millions of data points from a database on another continent. The network between the two hosts was very slow. A faster computer would not improve performance.

The solution, however, was not to build a faster network, either. Instead, we moved the calculation to be closer to the data.

Lesson learned: always figure out the real problem and what the most effective way of solving it as opposed to pushing the problem down the stack or into the cloud.

0

Worth Reading: 10 Optimizations on Linear Search

Stumbled upon an article by Tom Limoncelli. He starts with a programming question (skip that) but then goes into an interesting discussion of what’s really important.

Being focused primarily on networking this is the bit I liked most (another case of Latency Matters):

I once observed a situation where a developer was complaining that an operation was very slow. His solution was to demand a faster machine. The sysadmin who investigated the issue found that the code was downloading millions of data points from a database on another continent. The network between the two hosts was very slow. A faster computer would not improve performance.

The solution, however, was not to build a faster network, either. Instead, we moved the calculation to be closer to the data.

Lesson learned: always figure out the real problem and what the most effective way of solving it as opposed to pushing the problem down the stack or into the cloud.

0

AWS Bottlerocket Launches Into Container OS Space

Jeff Barr, chief evangelist for AWS, noted that it “includes only the packages that are needed”...

Read More »

0

Daily Roundup: Amazon, Apple Convene COVID-19 Response at White House

Amazon, Apple convened for COVID-19 response at White House; Microsoft defeated Necurs Botnet; and...

Read More »

0

DATA TYPES : YAML XML JSON

Different Data types i.e YAML,XML,JSON has been already discussed in below blogs :

JSON : https://knowpackets.com/2020/03/11/json/

XML: https://knowpackets.com/2020/02/28/xml/

YAML: https://knowpackets.com/2020/02/26/yaml/

Here you will find the comparison between all the three mentioned data types in one page:

0

Orange, Riverbed, Nuage Chat SD-WAN Pitfalls, Opportunities

And some agreed that despite the SD-WAN's advantages, MPLS wasn't going anywhere.

0

Microsoft Leads Massive Necurs Botnet Takedown

Between 2016 and 2019, Necurs was the most prominent spam and malware-delivery method and was...

Read More »

0

Money Moves: February 2020

HPE buys Scytale, embraces open source security; Intel ditches Nervana, high on Habana; plus the...

Read More »

0

Coronavirus Wreaks Havoc on Tech Industry

"This is one of those moments when companies must strive more than ever to act with values and...

Read More »

0

Hitachi Vantara Skims Containership’s Kubernetes Assets

Containership sank last fall after failing to monetize its Kubernetes distribution.

0

JSON

JSON(Java Script Object Notification) is another data type apart from XML and YAML ,It’s easy for human and machine to understand than XML.

As usual, lets start with json example:

anurudh@anurudh:~/newfolder$ cat ex1_js.json
{
  "hostname": "Router1",
  "vendor": "cisco",
  "users": {
      "admin": 15,
      "storage": 10
},
  "vlans": [
     { 
       "vlan_name": "VLAN10",
       "vlan_id": 10
     },
     {
      "vlan_name": "VLAN20",
      "vlan_id": 20
     }
   ]
}

We like to put few point :

• The whole thing is wrapped in curly braces {}.
• JSON  use string values when describing the keys in these constructs.

Working with JSON in Python

anurudh@anurudh:~/newfolder$ cat ex1_js.py 
# Module need to be imported to use json 
import json

# File is open and stored in varible dat 
with open("ex1_js.json") as f:
     data = f.read()

# json.loads places json data into json_out (dictionary)
json_out = json.loads(data)

# print output
print(json_out)

# Lets check the data type 'json_out'
print("The Json document loaded as type {0}\n".format(type(json_out)))

# Method json.dumps will  convert python object back json string
json_out1 = json.dumps(json_out)

#print output
print(json_out1)

# Lets check the data type 'json_out1'
print("The Json document loaded as type {0}\n".format(type(json_out1)))

anurudh@anurudh:~/newfolder$ 

OUTPUT

anurudh@anurudh:~/newfolder$ python3 ex1_js.py 
{'hostname': 'Router1',  Continue reading

0

Intermediary Liability: The Hidden Gem

There is a law in the United States that consists of twenty-six words: “No provider or user of an interactive computer service shall be treated as the publisher or speaker of any information provided by another information content provider.” Otherwise known as Section 230 of the Communications Decency Act (CDA), it has been characterized as the law that “created the Internet.”

Only part of this statement is true. Section 230 did not actually create the Internet because the Internet was created through the collaboration of a diverse set of people around the world. What is true, however, is that the intermediary liability regime has undergirded the Internet as we know it. It has been responsible for three primary features of the Internet:

• It has created certainty and predictability: intermediary liability rules have allowed Internet providers (both infrastructure and content) to design compliance strategies based on a limited set of laws and their Terms of Service (ToS). Because of intermediary liability, companies can design businesses that suit their needs.
• It has created good Internet citizens: intermediary liability rules have ensured that the burden of determining whether a business is going to speak in a particular way is Continue reading

0

Day Two Cloud 039: Kubernetes Fundamentals For Infrastructure

Kubernetes is making a lot of noise in the infrastructure world. Day Two Cloud co-host Ethan Banks spent three days taking a deep-dive course on the orchestration platform, and on today's show aims to provide Kubernetes fundamentals as they apply to your infrastructure.

0

Day Two Cloud 039: Kubernetes Fundamentals For Infrastructure

Kubernetes is making a lot of noise in the infrastructure world. Day Two Cloud co-host Ethan Banks spent three days taking a deep-dive course on the orchestration platform, and on today's show aims to provide Kubernetes fundamentals as they apply to your infrastructure.

The post Day Two Cloud 039: Kubernetes Fundamentals For Infrastructure appeared first on Packet Pushers.

0

NtC – Source Of Truth

In this inaugural episode of Network to Code on Network Collective, Jeremy Stretch, John Anderson, Rick Sherman, and Jordan Martin meet up around the virtual roundtable to discuss what a source of truth is, how it can play a critical role in your network automation efforts, and how the open source project Netbox might fill that role in your network.

---

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post NtC – Source Of Truth appeared first on Network Collective.