Kentik

SEPTEMBER 20, 2021

Packet loss in TCP connections results in retransmissions which can introduce significant latency. Below is the beginning of a TCP handshake. After the DNS lookup and the ARP, the host reaches out to the IP address of the destination using a SYN in order to open a connection. Router hops introduce the most.

TCP 116

TCP Routers Bandwidth IP Address 116

Heroku

NOVEMBER 21, 2024

After thorough router investigation and peeling back Pumas server code, we realized what we had stumbled upon was not actually a Router 2.0 Reproduction The long response times issue first surfaced through a customer support ticket for an application running a Puma + Rails web server. ec2:11059 tcp 0 0 ip-10-1-87-57.ec2:28631

Routers 59

Routers TCP Server DNS 59

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.

IP Address 49

IP Address DNS UDP port Advertising 49

CATO Networks

JUNE 14, 2023

In most cases, these patterns are evaluated on a single network packet, rather than a sequence of flows between a client host and a server. MAC address in the data link layer of a packet capture Moving up the stack, at the network and transport layers, is a much more granular source of information, the TCP/IP stack.

IoT 52

IoT TCP Protocol Server 52

Network Engineering

JULY 3, 2021

inside no snmp-server location no snmp-server contact snmp-server enable traps snmp authentication linkup linkdown coldstart crypto ipsec security-association lifetime seconds 28800 crypto ipsec security-association lifetime kilobytes 4608000 telnet timeout 5 ssh timeout 5 console timeout 0 dhcpd auto_config outside !

VPN 52

VPN IP Address Encryption TCP 52

Kentik

DECEMBER 18, 2019

These include SNMP, DNS, RADIUS and streaming telemetry. we never initiate connections to the customers) on servers running Debian GNU/Linux. The load balancer node rewrites the source MAC of the packet and forwards the packet to the real server that’s running the BGP code. BGP routing data is another important data source.

Server 13

Server Topology TCP Network 13

Confluent

JULY 1, 2019

port 53352 dst 54.191.84.122 port 9092 rank info not available TCP aux info available Connection to ec2-54-191-84-122.us-west-2.compute.amazonaws.com compute.amazonaws.com port 9092 [tcp/XmlIpcRegSvc] succeeded! compute.amazonaws.com:9092 --topic test >> $ kafka-console-consumer --bootstrap-server ec2-54-191-84-122.us-west-2.compute.amazonaws.com:9092

Port 101

Port IaaS DNS Network 101

Kentik

JUNE 14, 2023

An engineer standing in front of a console today stares at the traffic moving from their on-prem data center up and out to a CASB, receiving DNS responses from a cloud-provided DNS service, and then on through an ephemeral microservices architecture in a public cloud. And this, of course, is just to reach the front end.

WAN 59

WAN Data Centers DNS Internet 59

Kentik

MAY 31, 2017

Today’s siloed network management tools can be traced back to an earlier era, when design was constrained by the limited computing, memory, and storage capacity of appliances or single-server software deployments. Host or sensor-based network performance metrics such as latency, TCP retransmits, errors, out-of-order packets, etc.

Network 40

Network Networking Engineering TCP 40

Kentik

NOVEMBER 23, 2015

According to Akamai’s Q1 2015 State of the Internet report , over 50% of volumetric attacks are IP flood attacks involving a high volume of spoofed packets such as TCP SYN, UDP, or UDP fragments. In the following examples we’ll look at how this data can help you separate an attack from an innocent spike. Diagnosis by Destination IP.

IP Address 40

IP Address Port Protocol Internet 40

Kentik

MARCH 27, 2017

The disruption of network bandwidth or performance to any particular set of services can create a disastrous ripple effect on the entire application eco-system, which makes it critical to protect more than just north-south, client-server Web traffic. Hackers can shut down Web revenues by disabling just one critical dependency.

Cloud 40

Cloud Internet Bandwidth Network 40

Kentik

JULY 28, 2021

It isn’t so much that packet loss is a huge problem — TCP and QUIC were engineered in anticipation that lost packets would be inevitable. Latency : Missing packets in connection-oriented protocols such as TCP and QUIC result in lost packets getting resent. UDP vs. TCP. Packet Loss Causes Problems with Cloud Applications.

Cloud 116

Cloud TCP Routers Protocol 116

CloudFaire

DECEMBER 9, 2024

of TCP connections are unexpectedly terminated before any useful data can be exchanged. public DNS resolver from millions of users around the world. Note that server-side support is only half of the equation for driving IPv6 adoption, as end user connections need to support it as well. (In Security 6.5%

Internet 72

Internet Email IP Address TCP 72