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Category Archives for "Networking"

Cisco to gauge user experience with its cloud-management service

Cisco is taking steps to better control the performance and observability of cloud-based enterprise applications.At the AWS re:Invent conference this week, Cisco said it has added a feature called business transaction insights to its AppDynamics Cloud system so it can more easily track performance of applications running on the AWS Cloud including on Kubernetes, microservices, and other AWS infrastructure.Available since June, AppDynamics Cloud is a cloud-native service designed to observe applications and take action to remediate performance problems. It is built on OpenTelemetry, an emerging standard for data collection that helps to visualize and measure application performance from multiple data sources, said AppDynamics Executive CTO Gregg Ostrowski.To read this article in full, please click here

Why Kubernetes And Containerization?

There’s a general consensus in today’s tech world:  “Use Kubernetes.” But why? Why jump into Kubernetes if you’re already running production-level workloads on virtual machines? Why change what your engineering team has been doing for ten years that works just fine? Why have engineers learn a new technology that may take time to implement? In […]

The post Why Kubernetes And Containerization? appeared first on Packet Pushers.

Service Mesh & Ingress In Kubernetes Lesson 8: Deploying An Ingress & Service Mesh For Production

This video walks you through installing an ingress controller and the Istio service mesh in a production cloud environment. Michael Levan brings his background in system administration, software development, and DevOps to this video series. He has Kubernetes experience as both a developer and infrastructure engineer. He’s also a consultant and Pluralsight author, and host […]

The post Service Mesh & Ingress In Kubernetes Lesson 8: Deploying An Ingress & Service Mesh For Production appeared first on Packet Pushers.

Live next week: The CalicoCon + Cloud-Native Security Summit!

Tigera is delighted to present the annual CalicoCon + Cloud-Native Security Summit on December 7th, 2022, 9:45 a.m. – 4:00 p.m. PT. This is your chance to network with top cloud-native platform, security, DevOps, and site reliability engineer (SRE) teams, and explore real-world use cases with major players in the cloud-native industry.

Live, free, and fully virtual, the Summit gathers industry experts to explore the best practices for securing, observing, and troubleshooting cloud-native applications through real-world stories.

Who should attend?

The Summit is curated for security, DevOps, SRE, and platform architect teams in the cloud-native world.

  • Security teams – Learn how to holistically secure your cloud-native applications using today’s best practices.
  • DevOps and SRE teams – Find out how you can incorporate security and observability in your CI/CD pipeline to enable security, observability, and troubleshooting,
  • Platform Architects – Learn architecture patterns and best practices to secure and troubleshoot cloud-native applications,

Speakers and sessions

From panels to workshops to fireside chats, the Summit offers a variety of interactive sessions. Here’s a quick peek at some of our speakers and sessions:

Cloudflare partners to simplify China connectivity for corporate networks

Cloudflare partners to simplify China connectivity for corporate networks
Cloudflare partners to simplify China connectivity for corporate networks

IT teams have historically faced challenges with performance, security, and reliability for employees and network resources in mainland China. Today, along with our strategic partners, we’re excited to announce expansion of our Cloudflare One product suite to tackle these problems, with the goal of creating the best SASE experience for users and organizations in China.

Cloudflare One, our comprehensive SASE platform, allows organizations to connect any source or destination and apply single-pass security policies from one unified control plane. Cloudflare One is built on our global network, which spans 275 cities across the globe and is within 50ms of 95% of the world’s Internet-connected population. Our ability to serve users extremely close to wherever they’re working—whether that’s in a corporate office, their home, or a coffee shop—has been a key reason customers choose our platform since day one.

In 2015, we extended our Application Services portfolio to cities in mainland China; in 2020, we expanded these capabilities to offer better performance and security through our strategic partnership with JD Cloud. Today, we’re unveiling our latest steps in this journey: extending the capabilities of Cloudflare One to users and organizations in mainland China, through additional strategic partnerships. Let’s break down Continue reading

Network Break 409: Regulators Tap Brakes On Broadcom, VMware; Google Settles Location Tracking Charges For $392M

This week's Network Break podcast discusses UK and EU regulators wanting a closer look at Broadcom's VMware acquisition, Google settling with 40 US states over location tracking charges, and the FCC publishing responses from the 15 biggest US mobile providers regarding customer geolocation data tracking, plus even more IT news.

The post Network Break 409: Regulators Tap Brakes On Broadcom, VMware; Google Settles Location Tracking Charges For $392M appeared first on Packet Pushers.

Network Break 409: Regulators Tap Brakes On Broadcom, VMware; Google Settles Location Tracking Charges For $392M

This week's Network Break podcast discusses UK and EU regulators wanting a closer look at Broadcom's VMware acquisition, Google settling with 40 US states over location tracking charges, and the FCC publishing responses from the 15 biggest US mobile providers regarding customer geolocation data tracking, plus even more IT news.

A simple BPFTrace to see TCP SendBytes as a Histogram

< MEDIUM: https://raaki-88.medium.com/a-simple-bpftrace-to-see-tcp-sendbytes-as-a-histogram-f6e12355b86c >

A significant difference between BCC and BPF is that BCC is used for complex analysis while BPF programs are mostly one-liners and are ad-hoc based. BPFTrace is an open-source tracer, reference below

https://ebpf.io/ — Excellent introduction to EBPF

https://github.com/iovisor/bpftrace — Excellent Resource.

Let me keep this short, we will try to use BPFTrace and capture TCP

We will need

  1. Netcat
  2. DD for generating a dummy 1GB File
  3. bpftrace installed

To understand the efficiency of this, let’s attach a Tracepoint, a Kernel Static Probe to capture all of the new processes that get triggered, imagine an equivalent of a TOP utility with means of reacting to the event at run-time if required

https://github.com/iovisor/bpftrace/blob/master/docs/reference_guide.md#probes — Lists out type of probes and their utility

We can clearly see we invoked a BPFTrace for tracepoint system calls which takes execve privilege, I executed the ping command and various other commands and you can see that executing an inbound SSH captured invoke of execve-related commands and the system banner.

sudo bpftrace -e 'tracepoint:syscalls:sys_enter_execve { join(args->argv); }'

Attaching 1 probe...

clear
ping 1.1.1.1 -c 1
/usr/bin/clear_console -q
/usr/sbin/sshd -D -o AuthorizedKeysCommand /usr/share/ec2-instance-connect/eic_run_authorized_keys %u  Continue reading

Tech Bytes: Run On-Prem Infrastructure Like Public Cloud With vSphere+ (Sponsored)

Today’s Tech Bytes podcast, sponsored by VMware, dives into VMware’s vSphere+. vSphere+ allows you to operate your on-prem workloads and infrastructure as if they were a public cloud. It supports VMs and Kubernetes, and provides admin, developer, and add-on services delivered via SaaS.

The post Tech Bytes: Run On-Prem Infrastructure Like Public Cloud With vSphere+ (Sponsored) appeared first on Packet Pushers.

The Linux Kernel Key Retention Service and why you should use it in your next application

The Linux Kernel Key Retention Service and why you should use it in your next application
The Linux Kernel Key Retention Service and why you should use it in your next application

We want our digital data to be safe. We want to visit websites, send bank details, type passwords, sign documents online, login into remote computers, encrypt data before storing it in databases and be sure that nobody can tamper with it. Cryptography can provide a high degree of data security, but we need to protect cryptographic keys.

At the same time, we can’t have our key written somewhere securely and just access it occasionally. Quite the opposite, it’s involved in every request where we do crypto-operations. If a site supports TLS, then the private key is used to establish each connection.

Unfortunately cryptographic keys sometimes leak and when it happens, it is a big problem. Many leaks happen because of software bugs and security vulnerabilities. In this post we will learn how the Linux kernel can help protect cryptographic keys from a whole class of potential security vulnerabilities: memory access violations.

Memory access violations

According to the NSA, around 70% of vulnerabilities in both Microsoft's and Google's code were related to memory safety issues. One of the consequences of incorrect memory accesses is leaking security data (including cryptographic keys). Cryptographic keys are just some (mostly random) data stored in Continue reading

Data-center requirements should drive network architecture

If you like survey data, here’s an interesting fact for you. Every year since 2000, when I started surveying enterprises on the question, the most important factor driving investment and change in enterprise networks was the data center. It’s like the network is the tail of a big, fuzzy, maybe-largely-invisible dog, and it’s time we look at where that dog might be leading us.Today’s virtual private networks (VPNs) evolved from the days when companies leased time-division-multiplexed (TDM) lines and connected their own routers. That approach focused companies on how to network sites, and they now think about networking people instead. But people are half the story; the other half is what the people are doing, which is accessing (increasingly via the cloud) data-center applications and databases.To read this article in full, please click here

Data-center requirements should drive network architecture

If you like survey data, here’s an interesting fact for you. Every year since 2000, when I started surveying enterprises on the question, the most important factor driving investment and change in enterprise networks was the data center. It’s like the network is the tail of a big, fuzzy, maybe-largely-invisible dog, and it’s time we look at where that dog might be leading us.Today’s virtual private networks (VPNs) evolved from the days when companies leased time-division-multiplexed (TDM) lines and connected their own routers. That approach focused companies on how to network sites, and they now think about networking people instead. But people are half the story; the other half is what the people are doing, which is accessing (increasingly via the cloud) data-center applications and databases.To read this article in full, please click here

netlab Release 1.4.1: Cisco ASAv

The star of the netlab release 1.4.1 is Cisco ASAv support: IPv4 and IPv6 addressing, IS-IS and BGP, and libvirt box building instructions.

Other new features include:

Upgrading is as easy as ever: execute pip3 install --upgrade networklab.

New to netlab? Start with the Getting Started document and the installation guide.

netlab Release 1.4.1: Cisco ASAv

The star of the netlab release 1.4.1 is Cisco ASAv support: IPv4 and IPv6 addressing, IS-IS and BGP, and libvirt box building instructions.

Other new features include:

Upgrading is as easy as ever: execute pip3 install --upgrade networklab.

New to netlab? Start with the Getting Started document and the installation guide.

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