NVA Part II – Internet Access with a single NVA
Introduction
In the previous chapter, you learned how to route east-west traffic through the Network Virtual Appliance (NVA) using subnet-specific route tables with User Defined Routes (UDR). This chapter introduces how to route north-south traffic between the Internet and your Azure Virtual Network through the NVA.
Figure 3-1 depicts our VNet setup, which includes DMZ and Web Tier zones. The NVA, vm-nva-fw, is connected to subnet snet-north (10.0.2.0/24) in the DMZ via a vNIC with Direct IP (DIP) 10.0.2.4. We've also assigned a public IP address, 51.12.90.63, to this vNIC. The second vNIC is connected to subnet snet-west (10.0.0.0/24) in the Web Tier, with DIP 10.0.0.5. We have enabled IP Forwarding in both vNICs and Linux kernel. We are using Network Security Groups (NSGs) for filtering north-south traffic.
Our web server, vm-west, has a vNIC with DIP 10.0.0.4 that is connected to the subnet snet-west in the Web Tier. We have associated the route table to the subnet with the UDR, which forwards traffic to destination IP 141.192.166.81 (remote host) to NVA. To publish the web server to the internet, we've used the public IP of NVA.
On the NVA, we have configured a Destination NAT rule which rewrites the destination IP address to 10.0.0.4 to packets with the source IP address 141.192.166.81 and protocol ICMP. To simulate an http connection, we're using ICMP requests from a remote host.
Figure 3-1: Example Diagram and.
5G Presents Hidden Sustainability Opportunity
Large venues can piggyback on their in-building 5G network upgrade projects to reduce their carbon footprints. Here’s how.DDoS threat report for 2023 Q1
Welcome to the first DDoS threat report of 2023. DDoS attacks, or distributed denial-of-service attacks, are a type of cyber attack that aim to overwhelm Internet services such as websites with more traffic than they can handle, in order to disrupt them and make them unavailable to legitimate users. In this report, we cover the latest insights and trends about the DDoS attack landscape as we observed across our global network.
Kicking off 2023 with a bang
Threat actors kicked off 2023 with a bang. The start of the year was characterized by a series of hacktivist campaigns against Western targets including banking, airports, healthcare and universities — mainly by the pro-Russian Telegram-organized groups Killnet and more recently by AnonymousSudan.
While Killnet-led and AnonymousSudan-led cyberattacks stole the spotlight, we haven’t witnessed any novel or exceedingly large attacks by them.
Hyper-volumetric attacks
We did see, however, an increase of hyper-volumetric DDoS attacks launched by other threat actors — with the largest one peaking above 71 million requests per second (rps) — exceeding Google’s previous world record of 46M rps by 55%.
Back to Killnet and AnonymousSudan, while no noteworthy attacks were reported, we shouldn't underestimate the potential risks. Unprotected Internet Continue reading
HS045 Seize Opportunities for Modern IT Operations with VIA (Sponsored)
AIOps is been a buzzword but public generative AI and LLMs like ChatGPT mean there is a lot more awareness and demand. In todays sponsored show we are talking to Vitria about VIA AI Ops and how you can add it to your IT strategy.
HS045 Seize Opportunities for Modern IT Operations with VIA (Sponsored)
AIOps is been a buzzword but public generative AI and LLMs like ChatGPT mean there is a lot more awareness and demand. In todays sponsored show we are talking to Vitria about VIA AI Ops and how you can add it to your IT strategy.
The post HS045 Seize Opportunities for Modern IT Operations with VIA (Sponsored) appeared first on Packet Pushers.
DHCP Relaying with Redundant DHCP Servers
Previous posts in this series (DHCP relaying principles, inter-VRFs relaying, relaying in VXLAN segments and relaying from EVPN VRF) used a single DHCP server. It’s time to add another layer of complexity: redundant DHCP servers.
Lab Topology
We’ll use a lab topology similar to the VXLAN DHCP relaying lab, add a second DHCP server, and a third switch connecting the two DHCP servers to the rest of the network.
DHCP Relaying with Redundant DHCP Servers
Previous posts in this series (DHCP relaying principles, inter-VRFs relaying, relaying in VXLAN segments and relaying from EVPN VRF) used a single DHCP server. It’s time to add another layer of complexity: redundant DHCP servers.
Lab Topology
We’ll use a lab topology similar to the VXLAN DHCP relaying lab, add a second DHCP server, and a third switch connecting the two DHCP servers to the rest of the network.
AI and Networking
Bill Gates recently called the development of AI as fundamental of a creation as the microprocessor, the personal computer, the Internet, and the mobile phone. He is most likely right. OpenAI found that around 80% of the U.S. workforce could have at least 10% of their work tasks affected by the introduction of large language models (LLMs). If you are ...
The post AI and Networking appeared first on NetworkStatic | Brent Salisbury's Blog.
Network Observability: Don’t Buy Into the Hype, Follow the Data
The following post is by Jeremy Rossbach, Chief Technical Evangelist at Broadcom. We thank Broadcom for being a sponsor. For today’s teams, it is exceedingly complex and costly to support multiple generations of infrastructure and applications. What’s worse, according to an IDC report on network observability, this is the number one challenge to achieving digital […]
The post Network Observability: Don’t Buy Into the Hype, Follow the Data appeared first on Packet Pushers.
Tech Bytes: Configure Devices, Stream Telemetry With Nokia’s Free, Open-Source gNMIc (Sponsored)
Today on the Tech Bytes podcast we dive into gNMIc with sponsor Nokia. gNMIc is open-source software you can use to configure devices and collect device telemetry. It can output telemetry to InfluxDB, Prometheus, and SNMP traps. Nokia has contributed gNMIc to the OpenConfig project. We talk with gNMIc creator Karim Radhouani, Technology and Architecture Consulting Engineer at Nokia, about why he developed the tool and how customers are using it.Tech Bytes: Configure Devices, Stream Telemetry With Nokia’s Free, Open-Source gNMIc (Sponsored)
Today on the Tech Bytes podcast we dive into gNMIc with sponsor Nokia. gNMIc is open-source software you can use to configure devices and collect device telemetry. It can output telemetry to InfluxDB, Prometheus, and SNMP traps. Nokia has contributed gNMIc to the OpenConfig project. We talk with gNMIc creator Karim Radhouani, Technology and Architecture Consulting Engineer at Nokia, about why he developed the tool and how customers are using it.
The post Tech Bytes: Configure Devices, Stream Telemetry With Nokia’s Free, Open-Source gNMIc (Sponsored) appeared first on Packet Pushers.
The Crazy Eights Of Large Language Models
We read a fairly large number of technical papers here at The Next Platform, and it is a rare thing indeed when we can recommend that everyone – or damned near everyone – should read a paper. …
The Crazy Eights Of Large Language Models was written by Timothy Prickett Morgan at The Next Platform.