Kentik

SEPTEMBER 22, 2021

Last Tuesday, September 14th was the second Tuesday of the month, and for anyone running a network or working in IT, you know what that means: another Microsoft Patch Tuesday. Learn more about the application of Kentik for network business analytics here. The capability is more than simple NetFlow analysis. Microsoft Patch Tuesday.

DNS 145

DNS Port Routers Networking 145

Kentik

JANUARY 13, 2021

The Network is the Key. The network is down!” — I’m sure you heard that before. Despite your best efforts as a network engineer, network failures happen, and you have to fix them. Network troubleshooting becomes easier if your network is observable. Network Troubleshooting Defined.

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Networking Network TCP Protocol 114

Kentik

FEBRUARY 3, 2022

A peering coordinator is the person responsible for the way an IP network connects to the rest of the internet. Peering” is the term used for interconnections between two IP networks where the two networks provide access to each other’s networks and customers but do not allow traffic to transit to the rest of the internet.

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Port 5G Routers Internet 105

Kentik

JANUARY 24, 2022

Back in the 1990s, NetFlow was introduced on Cisco routers as a means to collect information about IP network traffic as it enters or exits an interface. Since then, network flows have been one of the best ways to gain insight into traffic. Source port for UDP or TCP, 0 for other protocols. Don’t rely on ports.

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Application IP Address DNS Port 96

Packet Pushers

MARCH 8, 2024

Today we metaphorically pop open the hood of switches and routers, taking a look at the mechanics of how they work. We also cover line rate, port-to-port latency, and buffers. Read more » Today we metaphorically pop open the hood of switches and routers, taking a look at the mechanics of how they work.

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Port MPLS Routers Networking 52

Juniper

DECEMBER 19, 2024

Official Juniper Networks Blogs The year in review: Delivering simplicity, productivity, reliability, and security with AI-Native Networking The past year at Juniper has been exciting to say the least. Junipers AIOps simplifies network management, empowering IT teams to shift from reactive to proactive management.

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Networking Network Wide Area Network Data Centers 83

Kentik

MAY 21, 2019

The Mirai botnet was first discovered back in 2016, but has continued to persist and abuse common vulnerabilities and exposures (CVEs) on IoT devices, including home routers and many other network-connected devices. These addresses were apparently port scanning IP addresses that belonged to the company sending the letter.

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Port IP Address Internet Networking 81

Kentik

NOVEMBER 17, 2021

Whether it is a Call of Duty update or a Microsoft Patch Tuesday , these OTT traffic events can put a lot of load on a network and understanding them is necessary to keep a network operating at an optimal level. Learn more about the application of Kentik for network business analytics here. The spice (and traffic) must flow.

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DNS Port Routers Networking 99

Network Engineering

JANUARY 1, 2025

Objectives Install FreeRADIUS on CentOS(steam 9) to perform Cisco device authentication Perform dot1x authentication on all ports of the switch Perform authentication by connecting a laptop to the switch CentOS(203.230.7.2) - Cisco 2960 Switch(203.230.7.254) - Cisco 2800 Series Router(gig0/0 : 203.230.7.1, 255.255.255.0

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Port Routers Firewall Server 52

Kentik

JUNE 7, 2023

Enterprises migrate to multi-cloud networks not because they want to, but because they have to. Two exciting new capabilities help you quickly answer any question about your multi-cloud network: Kentik Cloud users can now collect, analyze, and visualize flow logs generated on AWS Transit Gateways. There’s an acquisition.

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Cloud Gateway Port IP Address 97

DCNN Magazine

JANUARY 8, 2025

Juniper Networks , a provider of secure, AI-native networking, has today announced a landmark project with the Netherlands Institute for Radio Astronomy, ASTRON, to upgrade its core, access, WLAN and WAN network infrastructure, supporting the development of its LOFAR 2.0 (Low Low Frequency Array) upgraded telescope.

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Networking Network Bandwidth Routers 52

Kentik

NOVEMBER 7, 2021

But, we also learned something else: When there is a network problem, we have to figure it out ourselves, which is less awesome. Leading up to SaaS offerings, everything we communicated with over the network to do our jobs (other than surf the web and send email) was hosted on-premises. I mean, no one sees me from the waist down.”.

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Routers Internet Application Server 104

Kentik

MARCH 19, 2020

When more of the workforce shifts to working remotely, it puts new and different strains on the infrastructure across different parts of the network, especially where VPN gateways connect to the network edge. Kentik provides an easy way to see not only the entire network but also how it’s being used.

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VPN Networking Network Gateway 69

Kentik

MARCH 6, 2019

Understanding the network footprint of applications and services is now essential for delivering fast and reliable services in cloud-native environments. Networking is not evaporating into the cloud but instead has become a critical component that underpins every part of modern application architecture. A Refresh: Kubernetes Basics.

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Networking Network Application Cloud 63

Network Engineering

OCTOBER 7, 2015

We have a Cisco 3825 router with an IPSec Remote Access VPN configured to authenticate against a radius server. We changed the radius-server host line in our config accordingly and the router is able to communicate with the new radius server. We're retiring the old server and moving to a new one (Windows Server 2012).

VPN 52

VPN Port Routers Server 52

Network Engineering

APRIL 7, 2022

When I connect a device to port 3 or 5, regardless if I have the port set to auto or I assign a static IP, I can not get anything to connect to the VLAN1 or VLAN2 (I am doing all this with the managed led on) I am sure I missing something simple. Anyone see what I am doing wrong? Thank You.

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Port IP Address Routers 52

CATO Networks

JANUARY 17, 2018

In the light of recent ransomware attack campaigns against Microsoft RDP servers, Cato Research assessed the risk network scanning poses to organizations. What is Network Scanning? Network scanning is a process for identifying active hosts on a network. Whats Services Are Normally Targeted By Network Scanning?

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Networking Network Server Port 52

NW Kings

JANUARY 7, 2025

Static routes are fundamental components in networking that help direct traffic efficiently from one network segment to another. In this blog, we will explore what static routes are, how they differ from dynamic routes, and how to configure them on routers like Cisco devices. What is the role of static routes in networking?

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Routers IP Address Protocol Topology 52

Kentik

JANUARY 29, 2020

There is a lot of confusion regarding the two primary data sets in network management: SNMP and flow. SNMP is used to collect metadata and metrics about a network device. This critical technology is a basic building block of modeling, measuring, and understanding the network. What is SNMP? When is SNMP Used?

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Port Networking Network Data Centers 16

Kentik

APRIL 3, 2023

Those calls could be for kernel services, network services, accessing the file system, and so on. Therefore, by looking at the interactions between the application and the kernel, we can learn almost everything we want to know about application performance, including local network activity. How does eBPF work?

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TCP Application Virtual machine Networking 110

Kentik

JANUARY 29, 2020

There is a lot of confusion regarding the two primary data sets in network management: SNMP and flow. SNMP is used to collect metadata and metrics about a network device. This critical technology is a basic building block of modeling, measuring, and understanding the network. What is SNMP? When is SNMP Used?

Port 78

Port Networking Network Data Centers 78

The Network DNA

NOVEMBER 26, 2024

Cisco ASA in a Network Configuring DHCP, AAA, and SSH NDNA-ASA(config)# dhcpd address 10.10.10.3-10.10.10.100 Configure address translation using PAT and network objects NDNA-ASA(config)# object network INSIDE-NET NDNA-ASA(config-network-object)# subnet 10.10.10.0 NDNA-ASA(config)# dhcpd option 3 ip 10.10.10.1

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Firewall IP Address VPN Port 52

Network Engineering

DECEMBER 11, 2023

We have a block of static IPs facing the public, and have to have a router which points all the traffic to our router/gateway which points all the traffic to the ISP. Right now, all traffic has a static rule to send all traffic to the ISP gateway on the router at the edge going to the hand off. network subnet 10.113.0.0

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VPN Port Protocol WAN 52

The Network DNA

NOVEMBER 26, 2024

Cisco ASA Firewall in a Network What is Cisco ASA Firewall? Cisco ASA is a security device that includes a firewall, antivirus, intrusion prevention, and a virtual private network (VPN). It enables proactive threat defense, preventing assaults from spreading throughout the network. How to check the show version command ?

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Firewall VPN IP Address Port 52

Kentik

JANUARY 11, 2016

In our recent blog post DDoS Detection: Source Geography NetFlow Analysis we looked at how you can actively explore network traffic with Kentik Detect and discover attacks that you might not otherwise realize are happening. To see that, we go back to the Metrics menu and choose Destination » Port. Conclusion.

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Port Networking Network UDP port 40

Network Engineering

FEBRUARY 2, 2024

However, I'm encountering difficulties at the step where I need to configure a routed port or a static route. set system mode router ! Despite attempting these configurations, I'm unable to achieve successful communication between the different VLANs. no ip address dhcp !

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IP Address Port Routers 52

Kentik

MARCH 13, 2019

With many attacks stemming from totally unpredictable events like political dissent, employee misconduct, or actions of third parties, every type of organization needs to be prepared to mitigate DDoS attacks and proactively defend their networks to ensure business continuity. Destination port. Source port. Destination Prefix.

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IP Address Port Routers DNS 49

Kentik

FEBRUARY 8, 2016

For reasons of enforced obfuscation by RFC writers, routes are also called Network Layer Reachability Information (NLRI). Another foundational concept is the Autonomous System (AS), which is a way of referring to a network. That network could be yours, or belong to any other enterprise, service provider, or nerd with her own network.

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Advertising Routers Internet Protocol 49

Engineering at Meta

OCTOBER 2, 2024

Instead of simply porting our mobile social apps, we chose React Native as it enabled our teams to iterate and build quickly with robust animation capabilities, great performance, and a shared platform that powers most of the 2D Meta Quest system apps. The most impactful improvement that our teams made was initiating network queries earlier.

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Engineering Application JavaScript Port 135

CATO Networks

JANUARY 2, 2022

The networking industry loves a good buzzword as much as any other IT sector. Network-as-a-Service (NaaS) certainly fits that billing. The term has been around for at least a decade has come back in vogue to describe networking purchased on a subscription basis. Gartner identifies the specific attributes of a cloud service.

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NaaS SASE WAN Networking 52

Kentik

SEPTEMBER 26, 2016

On May 27 of this year, Gartner Research Director Sanjit Ganguli released a research note titled “Network Performance Monitoring Tools Leave Gaps in Cloud Monitoring.” You’d put a few others — I emphasize “few” because these appliances were and are not cheap — at other major choke points in and out of the network.

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Networking Network Data Centers Server 40

Kentik

DECEMBER 22, 2016

We really respected their thoroughness and the fact that they are practicing network engineers, so as we’ve come up with cool new gizmos in our product, we’ve asked them to extend their review. Following here, from their latest review, are some excerpts that focus on Kentik NPM, our enhanced network performance monitoring solution.

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Networking Network Server Port 40

Kentik

SEPTEMBER 11, 2018

Flow-based network monitoring relies on collecting information about packet flows (i.e. a sequence of related packets) as they traverse routers, switches, load balancers, ADCs, network visibility switches, and other devices. Flow-based monitoring provides significant advantages over other network monitoring methods.

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Protocol Ethernet Networking Network 66

Kentik

MARCH 21, 2016

Making Flow Records a Force for Good on Your Network. In fact, the network infrastructure of nearly every business that uses IP networks — which these days is effectively everyone — generates volumes of metadata on an hourly basis. Network metadata has been available for a relatively long time. Analysis (R)evolution.

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Networking Network IP Address Port 40

Kentik

JUNE 6, 2016

This is where infrastructure visibility paired with network traffic analysis can save the customer experience. Using a network monitoring tool that focuses on infrastructure devices, you can easily identify bandwidth bottlenecks. Combining network details with flow analytics gets you answers for your client. They get it.

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Networking Network IP Address Bandwidth 40

Kentik

JUNE 30, 2015

We were one of SprintLink’s first BGP customers, and we had dozens of Cisco and Wellfleet routers. What we didn’t have was a way to answer any of the many urgent network utilization questions we faced every day: Where was our users’ traffic was coming from? Where should it plug into the network? Should it be a DS3?

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Routers Port Server Networking 40

Kentik

MAY 10, 2018

Modern enterprise networks are becoming more dynamic and complex, which poses significant challenges for today’s information technology leaders. As more workloads move to the cloud and access networks become more open, ensuring security and stability becomes a more demanding task. The Anatomy of a Multi-Tenant Network.

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Networking Network Engineering Port 40