Kentik

OCTOBER 6, 2017

And Google disclosed seven vulnerabilities in DNS’ Dnsmasq software. Yet More DNS and DHCP Vulnerabilities (Google Blog). Most Companies Are Unprepared for DNS Attacks (HelpNetSecurity). Russia also made headlines for its covert efforts to steal secrets from the NSA.

DNS 40

DNS Internet Network Networking 40

Kentik

NOVEMBER 17, 2021

Kentik’s OTT Service Tracking (part of Kentik Service Provider Analytics) combines DNS queries with NetFlow to allow a user to understand exactly how OTT services are being delivered — an invaluable capability when trying to determine what is responsible for the latest traffic surge. The capability is more than simple NetFlow analysis.

DNS 99

DNS Port Routers Network 99

Kentik

JANUARY 10, 2022

Or, perhaps one or more of the 10-20 routers in the path needed to reach the destination gets busy for a hundred milliseconds or so. Domain lookup time : When a connection is made to a domain, the local operating system must first reach out to the DNS to resolve that hostname to an IP address. Where is the DNS?

IP Address 98

IP Address DNS TCP Application 98

ByteByteGo

NOVEMBER 23, 2024

Spots are limited, so sign up today How NAT Made the Growth of Internet Possible Network Address Translation (NAT) is the process that has made the growth of the Internet possible. share one router with a single public IP address. When a device wants to access the internet, it sends a request to your router.

IP Address 100

IP Address Routers Internet Server 100

Kentik

MAY 8, 2023

Core Concepts Resilience in networking is the ability of a network to withstand and quickly recover from failures or changes in its environment. This includes the ability to: Dynamically adjust to changes in network topology Detect and respond to outages Route around faults in order to maintain connectivity and service levels.

Network 52

Network Networking IP Address TCP 52

Kentik

OCTOBER 12, 2021

It’s interesting to observe how encryption and network performance monitoring (NPM) have evolved over time. When I first entered the networking industry right out of college, many applications sent passwords over the network in clear text, unencrypted. Getting all the DNS logs is often impractical. What is NPM?

Encryption 84

Encryption DNS IP Address Protocol 84

Kentik

DECEMBER 13, 2021

This is sort of a long shot, but are you using a corporate DNS server? You might try temporarily switching to a public DNS like Google’s 8.8.8.8. DNS lookups can introduce significant latency on new connections. Notice above that the routers used in the connection are looking pretty snappy. Check your local network.

Application 95

Application DNS Routers Server 95

Kentik

MARCH 13, 2023

Whether it’s as simple as ensuring solid connectivity with a SaaS provider or designing a robust, secure, hybrid, and multi-cloud architecture, the enterprise wide area network is all about connecting us to our resources, wherever they are. So what does this mean for today’s enterprise network engineer? So where are we today?

WAN 98

WAN Wide Area Network Topology Internet 98

Network Engineering

AUGUST 19, 2020

The problem is that when ESXi is down it takes down all the network with it, so I have to boot up another router to log in to it. edit1: This is a mockup of current/future network. ip dhcp pool mgmt network 10.0.0.0 default-router 10.0.0.1 dns-server 10.0.0.2 default-router 10.0.10.1 255.255.255.0

IP Address 52

IP Address DNS Routers Server 52

The Network DNA

JULY 9, 2024

Replacing cEdge in Cisco SDWAN environment Replacing the cEdge router with another cEdge through an RMA process for Cisco SDWAN , we need to put the basic configuration on the new RMA router and should be reachable via vManage. It is important that you should know the new router serial number should be learned to vManage NMS.

Routers 52

Routers IP Address MPLS WAN 52

Kentik

APRIL 24, 2023

What do network engineers working in the trenches, slinging packets, untangling coils of fiber, and spending too much time in the hot aisle really want from all their efforts? They want a rock-solid, reliable, stable network that doesn’t keep them awake at night and ensures great application performance. The answer is simple.

Network 52

Network Networking DNS Data Centers 52

Network Engineering

JANUARY 4, 2025

[I'm unsure whether this should be posted on Network Engineering, Server Faults or Android Enthusiasts] We have a hotspot service that connects into MikroTik routers, using the built-in hotspot facility. From a networking point of view, DNS is functional and there are no firewall entries that can restrict the traffic.

Firewall 52

Firewall DNS Gateway Routers 52

DoorDash Engineering

JANUARY 16, 2024

Internal Envoy routers allow communication between the global cell and replicated cells. Direct communication in a flat network: Leveraging AWS-CNI , microservice pods in distinct clusters within a cell can communicate directly with each other. Clients leverage DNS names to dynamically discover all pod IP addresses of desired services.

Cloud 84

Cloud IP Address DNS Routers 84

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

Kentik

JULY 8, 2019

It is the language spoken by routers to determine how packets can be sent from one router to another to reach their final destination. In simpler terms, any BGP-speaking network could announce itself (deliberately or not) as the origin of any prefix. One way to think about it is that RPKI is to BGP what DNSSEC is to DNS.

Routers 58

Routers Protocol Internet Advertising 58

Kentik

JANUARY 19, 2018

This week Verizon invested in an Open Network Automation Platform (ONAP) platinum membership. Here are those headlines and more: Verizon joins ONAP (SDxCentral) Verizon is the newest platnium member of the Open Network Automation Platform (ONAP). This week’s top story picks from the Kentik team. Carnegie Mellon is home to a $27.5M

Network 40

Network Networking Routers Artificial Intelligence 40

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. Which Network Vendors Support Flowspec? Action Type.

IP Address 49

IP Address Port Routers DNS 49

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 10.10.10.100 inside NDNA-ASA(config)# dhcpd dns 112.110.112.5 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

Firewall 52

Firewall IP Address VPN Port 52

CATO Networks

JUNE 23, 2019

The infamous malware that crippled global DNS provider Dyn, French Web host OVH and security journalist Brain Krebs Web site with botnets of infected home routers, baby monitors and other IoT devices is now infecting enterprise network equipment, according to a recent Palo Alto Networks blog and Network Computing article.

IoT 52

IoT WAN Routers IP Address 52

Rule 11

JUNE 21, 2024

Our recent discovery in router firmware exposes a security flaw in routers Network Address Translation (NAT) mapping handling, which can be exploited by attackers to bypass TCPs built-in randomization.

Energy 40

Energy Routers Topology DNS 40

Kentik

NOVEMBER 1, 2016

In the wake of the recent takedown of DNS provider Dyn, it’s common knowledge that Distributed Denial of Service (DDoS) attacks pose a serious and growing threat to the Internet and its component networks. A common fallback is to rely on manually defending your network with Remote Triggered Black Hole (RTBH).

Routers 40

Routers Network Networking DNS 40

CATO Networks

NOVEMBER 18, 2018

When backhoes cut a wiring duct, squirrels chewed through wires, or router updates blew up the network, the MPLS provider was charged with fixing the problem. The carrier and providers who will monitor and manage your last miles are often limited to the capabilities of the edge device, namely the router.

WAN 52

WAN MPLS Routers DNS 52

Kentik

FEBRUARY 13, 2017

Versatile Platform Inspires New Angles on Network Visibility. This project took a feed of DNS data and performed a streaming analysis of flow data. Using source AS or DNS matching it was possible to detect the percent of traffic in a given network that was from CDNs as well as the cumulative (overlapping) percentage.

Routers 40

Routers DNS Protocol Engineering 40

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. As an added precaution, drop all traffic from these countries going to port 4444 on our own routers. Conclusion.

Port 40

Port Network Networking UDP port 40

CATO Networks

JUNE 4, 2017

These backbones use cloud intelligence and Internet economics to seamlessly combine networking with advanced security at a fraction of the cost of MPLS. Redundant Provider Edge (PE) MPLS-enabled routers, switches, and other appliances were needed in each point-of-presence (PoP). We call these secured backbones the UberNet.

MPLS 52

MPLS Internet Bandwidth WAN 52

Kentik

DECEMBER 18, 2019

When it comes to analyzing network traffic for tasks like peering, capacity planning, and DDoS attack detection, there are multiple auxiliary sources that can be utilized to supplement flow information. These include SNMP, DNS, RADIUS and streaming telemetry. BGP routing data is another important data source.

Server 13

Server Topology TCP Network 13

Kentik

MARCH 28, 2016

How flow protocols adapt as network needs evolve. Network flow records today are an integral part of the network operations landscape. To make it work, routers were equipped to read packet headers and use field values to group the packets. In response to those requests, NetFlow was born.

Protocol 40

Protocol Routers MPLS IP Address 40

CATO Networks

MARCH 23, 2017

The massive hack of Sonys PlayStation Network (PSN) in 2014 was also widely seen as a revenge attack by North Korea against Sony. The Mirai botnet that launched the DDOS attack DYNs DNS, for example, used home routers, cameras and other IOT devices. “We have 50 security devices in our network thats causing complexity.”

Cloud 52

Cloud Network Networking Wide Area Network 52

Network Engineering

MAY 7, 2023

So my question, Assuming there is no other device (router/server) that can be used as DDNS client. What I want, is obviously the value would be the Public IP of SNAT from the broadband modem not the private ip of palo alto interface. DDNS Configuration: DDNS Info: NoIP record: Our environment: PANOS 10.2.4 If it is, how to do it?

Internet 52

Internet Routers Server DNS 52

Kentik

MARCH 6, 2017

One key point, as revealed in Akamai’s Q3 2016 State of the Internet Security Report, is that the vast majority of DDoS attacks — over 98% — are focused on disrupting access to network or server infrastructure rather than on targeting application limitations or vulnerabilities. Static policies that quickly fall out of sync with reality.

IoT 40

IoT DNS IP Address Server 40

CATO Networks

APRIL 19, 2017

Align the Network to Business Requirements When organizations purchase computers for employees we try to maximize our investment by aligning device cost and configuration to user function. But for many companies, managing their networks in this way is too expensive and not very scalable. The same is true with malware.

WAN 40

WAN MPLS Wide Area Network Firewall 40

Kentik

FEBRUARY 22, 2018

[vc_row][vc_column][vc_column_text] The Internet of Things (IoT) represents a massive threat to network infrastructure as already seen in widely publicized IoT-based DDoS attacks. So what needs to happen to safeguard our devices and networks from participating in these botnet attacks? This set the stage for other copycat attacks.

IoT 40

IoT Advertising Internet Network 40

Kentik

MARCH 27, 2017

I recently had an interesting conversation with an industry analyst about how Kentik customers use our big data network visibility solution for more accurate DDoS detection, automated hybrid mitigation, and deep ad-hoc analytics. Plus they often have a multitude of siloed tools for network analysis, DDoS detection, and mitigation.

Cloud 40

Cloud Internet Bandwidth Network 40

Kentik

JUNE 5, 2023

In this incident, a software bug caused a router to announce a large part of the IP address ranges present in the global routing table as if they were originated by AS7007. During the leak, a large portion of the internet’s traffic was redirected to AS7007, where it overwhelmed its networking equipment and was dropped.

IP Address 145

IP Address DNS Internet Routers 145

Kentik

JULY 28, 2021

Bad hardware (the switch or router port). Overwhelmed router. Congestion in the form of high-connection utilization or an overworked router in the path is another common source of trouble. TCP traceroute : A TCP trace reaches out to every router in the path to a target destination. Miss-matched duplexing (full vs. half).

Cloud 116

Cloud TCP Routers Protocol 116

High Scalability

NOVEMBER 25, 2019

To add elasticity, reliability and durability, these data centers are connected to Google Cloud platform using high speed, secure Google Interconnect network. As events are immutable we were caching them in Memcache for 12 hours but even them downloading the same events so many times from Memcache was causing network issues.

Data Centers 21

Data Centers Server Engineering Cloud 21