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. Although the ping utility on our computers uses ICMP, which is the first to see latency, other utilities similar to ping can execute tests similar to ping on top of TCP and UDP.

TCP 116

TCP Routers Bandwidth IP Address 116

Kentik

JANUARY 24, 2022

You can also learn about the protocols in use, the ports being used, the top interfaces, etc. IP protocol. Source port for UDP or TCP, 0 for other protocols. Destination port for UDP or TCP, type and code for ICMP, or 0 for other protocols. Source IP address. Destination IP address. IP type of service.

Application 96

Application IP Address DNS Port 96

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. There exist several protocols, from different network layers that can be used for OS fingerprinting. Figure 1 displays these protocols, based on the Open Systems Interconnection (OSI) model.

IoT 52

IoT TCP Protocol Server 52

Kentik

JANUARY 13, 2021

Send these pings using the Internet Control Message Protocol (ICMP) or TCP to one or any of the devices you believe to be involved. Ping is a utility that’s available on practically every system, be it a desktop, server, router, or switch. Get the Path with Traceroute. Could it be a misconfiguration issue?

Network 114

Network Networking TCP Protocol 114

Kentik

JANUARY 10, 2022

To be more specific: slowness can be introduced as your digital connection traverses your PC, the local wifi/wired connection, the local ISP, the Tier 1 or Tier 2 provider, or the CDN that provides the hardware which hosts the web server running the application. The use of ICMP vs. TCP or UDP to carry the ping can also be a factor.

IP Address 98

IP Address DNS TCP Application 98

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

OCTOBER 12, 2021

Once you saw a person’s password to any given application, you knew they were generally using the same one for all of their other applications — email, the ticketing system, the FTP and Novell servers, etc. HTTP is the new TCP. These protocols helped the NPM identify applications. Well, that didn’t last long.

Encryption 84

Encryption DNS IP Address Protocol 84

Confluent

OCTOBER 10, 2019

Machines provide a large number of usually closed and incompatible protocols in a proprietary format. OPC UA: this is an open and cross-platform, machine-to-machine communication protocol for industrial automation. In the IoT environment, for example, a large number of protocols for data exchange have developed in recent years.

IoT 20

IoT Internet Protocol Cloud 20

Kentik

APRIL 3, 2023

event(data) duration = float(event) / 1000000 print("TCP retransmit detected (duration: %0.2f Higher level abstractions For another level of abstraction, open source tools have emerged, such as Cilium , which runs as an agent in container pods or on servers. tcpdrop allows you to trace TCP packet drops.

TCP 110

TCP Application Virtual machine Network 110

CATO Networks

JUNE 1, 2020

Proxy TCP Connections Fundamentally, TCP (Transmission Control Protocol) connections inherently add more overhead than their UDP (User Datagram Protocol) counterparts. At scale, this leads to scenarios where TCP connections can significantly contribute to network congestion and reduce throughput.

Network 52

Network Networking TCP MPLS 52

Kentik

MAY 2, 2018

In simple terms, Border Gateway Protocol (BGP) is the protocol that routes traffic on the Internet. During last week’s attack, the attacker was redirecting traffic that belonged to Amazon’s Route 53 DNS servers. In this case, requests for MyEtherWallet.com were answered with the IP address of a fake server in Russia.

IP Address 49

IP Address DNS UDP port Advertising 49

Kentik

SEPTEMBER 20, 2016

For example, using SNMP or flow data to track traffic volume on interfaces, servers, and devices can provide necessary visibility into possible congestion points. In this post we’ll talk about using Kentik’s NPM solution to watch the TCP performance of traffic as reported to Kentik Detect from a Kentik nProbe host agent.

Network 40

Network Networking TCP Server 40

CATO Networks

AUGUST 18, 2022

Included features like QoS, TCP Acceleration, and Packet Loss Mitigation allow customers to fine-tune performance to their needs. Customers can control the use of TCP acceleration and Packet Loss Mitigation and assign a bandwidth priority level to the traffic. Cato Network Rules are pre-defined to meet common use-cases.

SASE 52

SASE Cloud Port Firewall 52

The Network DNA

JUNE 3, 2024

The load balancer sends requests to defined endpoints in the backend pool, which fail if directed to an unavailable server. If we enable high-availability ports (only available on internal load balancers), this will remove the protocol options and enable load balancing on all ports for TCP and UDP protocols.

IP Address 52

IP Address Port Protocol Virtual machine 52

CATO Networks

MARCH 24, 2020

At the beginning of the month, Microsoft released an advisory and security patch for a serious Windows Server Message Block (SMB) vulnerability called the Windows SMBv3 Client/Server Remote Code Execution Vulnerability (AKA Windows SMBv3 RCE or CVE-2020-0796). This would solve the problem for SMB servers but not SMB clients.

SMB 52

SMB Port Server Protocol 52

CATO Networks

DECEMBER 3, 2019

VPNs encapsulate data and encrypt the data using an algorithm contained within the transmission protocol. Todays VPNs primarily use one of the three major protocols, each of which has its advantages and disadvantages: PPTP is one of the oldest protocols and came into existence back in the days of Windows 95.

VPN 52

VPN Encryption Wide Area Network Protocol 52

CATO Networks

OCTOBER 30, 2019

Network packets, the protocol data units (PDUs) of the network layer, are often taken for granted by network pros. We all get the concept: to transmit data over a TCP/IP network like the Internet requires the data be broken down into small packets (usually less than 1500 bytes) containing the relevant application data (payload) and headers.

WAN 52

WAN Routers TCP Protocol 52

Kentik

DECEMBER 2, 2015

The issue was a new type of “spam reflection” that was causing headaches by allowing spammers to avoid detection while utilizing servers inside the customer’s network as spam sources. Here’s how these types of schemes work: The spammer sends a SYN from a spoofed source IP address to TCP port 25 (SMTP) on the target mail server.

TCP 40

TCP Protocol Port IP Address 40

Confluent

JULY 1, 2019

KAFKA_LISTENER_SECURITY_PROTOCOL_MAP defines key/value pairs for the security protocol to use per listener name. 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!

Port 101

Port IaaS DNS Network 101

Kentik

AUGUST 28, 2019

For example: Transport options: Many choices like TCP, UDP, and gRPC. Encoding options: Choices of JSON, XML, and Google Protocol Buffers (GPB). gNMI is a gRPC-based protocol for state management on network elements. Session Initiation options: Dial-out (i.e., device sends data to collector) versus Dial-in (i.e.,

Network 16

Network Networking Protocol TCP 16

Confluent

FEBRUARY 21, 2019

KSQL queries get executed as Kafka Streams applications by the KSQL server, removing the necessity of writing Java code for real-time stream processing. KSQL server is running and configured to read from the Kafka brokers. KSQL CLI is running and configured to talk to KSQL server and send interactive queries.

IP Address 83

IP Address Server Application Networking 83

Kentik

DECEMBER 5, 2016

Next we set Metric (still in the Query pane) to look at the percentage of TCP retransmits. What immediately jumps out from the graph is that there is a significant spike in the percentage of retransmitted TCP packets for these three hosts. Is It One of Our Servers? But was the issue possibly within Kentik’s own infrastructure?

Network 40

Network Networking TCP IP Address 40

CATO Networks

SEPTEMBER 11, 2023

allow users on the corporate VLAN to access printers located in the printer VLAN, over specific TCP ports. CCTV cameras), connected to an IOT-camera VLAN, to access the IOT File Server, but only over HTTPS. allow database synchronization across two VLANs located in separate datacenter rooms over a specific protocol/port.

LAN 52

LAN Cloud Firewall WAN 52

Kentik

OCTOBER 2, 2015

It focuses on using PHP to parse the JSON and to write the desired values to a human-readable file on a web server. A web server available for testing that is reachable from the Kentik Detect public SaaS deployment. Define a TCP Syn alert based on the queries provided in Defining an Alert below. protocol = 6.

Port 40

Port Protocol Server Bandwidth 40

Kentik

AUGUST 28, 2019

For example: Transport options: Many choices like TCP, UDP, and gRPC. Encoding options: Choices of JSON, XML, and Google Protocol Buffers (GPB). The gNMI Protocol. gNMI is a gRPC-based protocol for state management on network elements. Session Initiation options: Dial-out (i.e., collector connects into the device).

Network 52

Network Networking Protocol TCP 52

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. So next we’ll look at the protocol and destination port # of the traffic. DDoS detection and analysis cases. Diagnosis by Destination IP.

IP Address 40

IP Address Port Protocol Internet 40

CATO Networks

FEBRUARY 26, 2020

NGFW also supports the creation of custom application definitions to enable identification of specific apps based on TCP/UDP port, IP address, or domain. Additionally, a Deep Packet Inspection (DPI) engine enables contextualization of traffic. SWG focuses on layer 7 traffic exclusively and inspects inbound and outbound flows.

Network Security 52

Network Security Network Networking UDP port 52

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. HTTP (HyperText Transfer Protocol) is the core protocol that the web relies upon. The most recent version, HTTP/3 , was completed in 2022, and runs on top of a new transport protocol known as QUIC. Security 6.5% using HTTP/3.

Internet 72

Internet Email IP Address TCP 72