Kentik

MAY 2, 2018

During last week’s attack, the attacker was redirecting traffic that belonged to Amazon’s Route 53 DNS servers. Below is a diagram of how this attack worked: Once the attackers have the DNS requests coming to them, they can respond with the IP address of a server they control. In this case, the attackers stole crypto-currencies.

IP Address 49

IP Address DNS UDP port Advertising 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

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.

Port 40

Port Network Networking UDP port 40

Kentik

NOVEMBER 4, 2018

We post a lot on our blog about our advanced network analytics platform, use cases, and the ROI we deliver to service providers and enterprises globally. Simply put: Rust is a big part of how Kentik ingests Gigabits per second representing over a Petabit per second of Internet traffic, and stores 100 TB of network flow data each day.

IP Address 67

IP Address Protocol TCP DNS 67

CATO Networks

OCTOBER 25, 2022

Firewalls – the foundation of an organizations network security strategy – filters network traffic and can enforce an organizations security rules. By limiting the traffic that enters and leaves or enters an organizations network, a firewall can dramatically reduce its vulnerability to data breaches and other cyberattacks.

Firewall 52

Firewall Application Protocol Port 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.

IP Address 49

IP Address Port Routers DNS 49

Kentik

APRIL 19, 2023

In today’s fast-paced digital world, content distribution networks (CDNs) and embedded caching play a vital role in delivering a high-quality user experience. In this post, we will dive deeper into when it makes sense for ISPs to deploy embedded caches, the potential benefits, and how you can optimize the deployment to your network.

IP Address 52

IP Address DNS Server Network 52

CATO Networks

MAY 20, 2024

Content Delivery Networks (CDNs), which use shared hosting to quickly and efficiently spread content across the internet, handle these shared resources with sophisticated mechanisms. Examining the destination port used by the IP address can also yield valuable information.

IP Address 52

IP Address Server Port SMB 52

Kentik

NOVEMBER 23, 2015

In many organizations, networks are at the core of the business, enabling not only internal functions such as HR, supply chain, and finance but also the services and transactions on which the business depends for revenue. That makes network availability critical. Full traffic visibility to diagnose those nasty attacks.

IP Address 40

IP Address Port Protocol Internet 40

Kentik

OCTOBER 30, 2017

We simultaneously had a network bandwidth alert showing more than 20 Gbps of traffic among 20 nodes. We also looked at this traffic by destination port and saw that in addition to the spikes on port 14999 (aggregation service) we saw a dip on 20012 (ingest) which is a service running on the same node.

Port 40

Port DevOps IP Address Network 40

Scott's Weblog

AUGUST 16, 2024

From networking to security and from hardware to the cloud, there’s something in here for just about everyone. Networking Leon Adato has a great piece on transitioning from being a network engineer to being a cloud engineer. Geoff Huston discusses DNS and UDP truncation. Servers/Hardware Permanent damage?

DNS 40

DNS Server Engineering Cloud 40

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. Starting with the basic ACLs of the mid 90s, the first flow fields added were IP addresses, ports, and protocol. In response to those requests, NetFlow was born. More of a good thing.

Protocol 40

Protocol Routers MPLS IP Address 40

Wahl Network

APRIL 25, 2024

DNS is another great example of this. Think of it like the USB-C port for your system. We need everyone to plug into the same adapter interface but can offer a wide variety of experiences through that USB-C port! I should be able to ask for the URL based on the service and environment and get back the URL I need.

Engineering 52

Engineering Application Port PaaS 52

Kentik

JULY 28, 2021

Bad hardware (the switch or router port). You have to remember that ping rides on top of ICMP, and in a congested network it is one of the first protocols to get dropped by a busy router. SNMP : By polling all the SNMP devices on the network, packet loss details can be collected and a threshold can be set that notifies the NetOps team.

Cloud 116

Cloud TCP Routers Protocol 116

CloudFaire

JANUARY 21, 2025

Published quarterly, this report offers a comprehensive analysis of the evolving threat landscape of Distributed Denial of Service (DDoS) attacks based on data from the Cloudflare network. Cloudflares unique vantage point When we published our first report , Cloudflares global network capacity was 35 Terabits per second (Tbps).

IP Address 121

IP Address Network Networking Server 121