CloudFaire

DECEMBER 30, 2024

Internet protocol specifications are instructions designed for engineers to build things. Protocol designers take great care to ensure the documents they produce are clear. Any reasonably skilled engineer should be able to take a specification and produce a performant, reliable, and secure implementation.

Protocol 101

Protocol Server Internet TCP 101

Kentik

JANUARY 13, 2021

Despite your best efforts as a network engineer, network failures happen, and you have to fix them. No network engineer can troubleshoot without being prepared with their tools and telemetry. Send these pings using the Internet Control Message Protocol (ICMP) or TCP to one or any of the devices you believe to be involved.

Network 114

Network Networking TCP Protocol 114

Network Engineering

DECEMBER 21, 2015

Also, I was reading about Transport layer protocol when this line caught my eye: More than one transport layer protocol may be available to network applications. For example, the internet has two protocols - TCP and UDP. I doubt that those even had a Transport layer protocol.

Internet 52

Internet Protocol Network Networking 52

CATO Networks

JUNE 14, 2023

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. Over this protocol, a unique physical identifier, called the MAC address, is allocated to the network interface card (NIC) of each network device.

IoT 52

IoT TCP Protocol Server 52

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

NOVEMBER 4, 2018

In addition to basic data like source and destination IP address, port, protocol, etc., we collect network performance metrics like TCP connection setup latency, retransmitted and out-of-order packet counts, and window size. Rust’s performance and low memory use is a key benefit here.

IP Address 67

IP Address Protocol TCP DNS 67

Heroku

NOVEMBER 21, 2024

beta, our engineering team has addressed several bugs, all fairly straight-forward with one exception involving Puma -based applications. is subject to automatic load tests that run continuously, at varied request rates, body sizes, protocol versions. ec2:11059 tcp 0 0 ip-10-1-87-57.ec2:28631 ec2:11059 tcp 0 0 ip-10-1-87-57.ec2:24630

Routers 59

Routers TCP Server DNS 59

Kentik

OCTOBER 12, 2021

The Internet Engineering Task Force (IETF) is also working toward changes that will impact pervasive monitoring. HTTP is the new TCP. Fifteen years ago, NetOps could start up a packet analyzer and see all kinds of different unencrypted protocols such as FTP, SMTP, POP3, HTTP, DNS, etc. Check it out for yourself in RFC7258.

Encryption 84

Encryption DNS IP Address Protocol 84

CATO Networks

JUNE 1, 2020

For example, videoconferences between engineers and product managers on separate contents can be brought to a standstill because of packet loss or latency. Proxy TCP Connections Fundamentally, TCP (Transmission Control Protocol) connections inherently add more overhead than their UDP (User Datagram Protocol) counterparts.

Network 52

Network Networking TCP MPLS 52

CATO Networks

AUGUST 18, 2022

Because of this convergence, automated security engines and customized policies benefit from shared context and visibility allowing true single-pass processing and more accurate security verdicts. Included features like QoS, TCP Acceleration, and Packet Loss Mitigation allow customers to fine-tune performance to their needs.

SASE 52

SASE Cloud Port Firewall 52

Kentik

APRIL 3, 2023

event(data) duration = float(event) / 1000000 print("TCP retransmit detected (duration: %0.2f In that way, an engineer can anticipate a poor end-user experience before it happens, or at least before it gets really bad. tcpdrop allows you to trace TCP packet drops. tcpconnect allows you to trace active TCP connections.

TCP 110

TCP Application Virtual machine Network 110

Kentik

SEPTEMBER 20, 2016

It’s up to IT and network engineering groups to address performance, but to do so they need effective ways to measure and monitor. 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. TCP is the key.

Network 40

Network Networking TCP Server 40

Kentik

DECEMBER 2, 2015

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. Kentik Detect uses SQL as the query language, but the underlying data is stored in the Kentik Data Engine (KDE), a custom, distributed, column-store database. AND protocol = 6.

TCP 40

TCP Protocol Port IP Address 40

Network Engineering

DECEMBER 11, 2023

SITE B WAN IP OF THE GATEWAY] 1 SHOW LOGS ASA-1/pri/act# show crypto ipsec sa Doesnt show the active vpn connection ASA-1/pri/act# packet-tracer input inside tcp 10.113.1.11 Site A - Objects - object network DataSeg13 subnet 10.113.0.0 object network SiteBRemote10.1.10.0Network subnet 10.1.10.0 network subnet 10.113.0.0 255.255.255.0

VPN 52

VPN Port Protocol WAN 52

CATO Networks

JULY 18, 2018

Today, Cato introduced the first, identity-aware routing engine for SD-WAN. Segment-specific protocol acceleration technologies maximizes global throughput. A variety of TCP enhancements increase throughput when accessing cloud and WAN resources. It headlines a series of SD-WAN enhancements were making today to Cato Cloud.

WAN 52

WAN IP Address MPLS Cloud 52

Kentik

AUGUST 25, 2017

Google sped up TCP/IP. TCP/IP is the internet’s main protocol for data transmission. In attempt to make data move faster, Google engineers have developed an algorithm that speeds it up by about 14 percent. Cisco made plans to acquire hyperconvergence software company Springpath. Where Do Internet Trolls Live?

Data Centers 40

Data Centers Internet Network Networking 40

CATO Networks

APRIL 26, 2016

It lies at the core of how the Internet was built, its protocols, and how service providers implemented their routing layer. If they are lost along the way, it is the responsibility of higher-level protocols such as TCP to recover them. It doesnt matter that available capacity has increased dramatically.

Internet 52

Internet Routers MPLS Protocol 52

CATO Networks

FEBRUARY 26, 2020

Today, enterprises must be prepared to address a wide variety of attacks including social engineering attacks, Internet-borne malware, and ransomware across all the different attack vectors that exist within modern networks. Additionally, a Deep Packet Inspection (DPI) engine enables contextualization of traffic.

Network Security 52

Network Security Network Networking UDP port 52

Kentik

DECEMBER 5, 2016

In a recent blog post by Kentik Solutions Engineer Eric Graham we explained how we “dog food” our own NPM solution to troubleshoot network performance issues within our own cloud-based application. Next we set Metric (still in the Query pane) to look at the percentage of TCP retransmits. How does it work? Clues from AS Path.

Network 40

Network Networking TCP IP Address 40

CATO Networks

OCTOBER 5, 2020

Zone-based firewall vulnerabilities expose networks to TCP attacks The multiple vulnerabilities Cisco reported in its Zone-Based Firewall feature of IOS (CVE-2020-3421, CVE-2020-3480) leave enterprises network open to simple L4 attacks. One mitigation suggests rate limiting the IGMP protocol.

Firewall 52

Firewall Protocol SASE Network 52

Kentik

JUNE 7, 2023

Advanced analysis : With Kentik’s powerful analytics engine, you can perform an in-depth analysis of flow logs from any cloud. For example, an audit may be warranted if unexpected TCP traffic is flowing into a MariaDB instance but isn’t entering on port 3306.

Cloud 97

Cloud Gateway Port IP Address 97

CATO Networks

MAY 20, 2020

NGFWs can drill down beyond IP addresses, TCP/UDP ports, and network protocols to enforce policies based on packet content. Anti-malware Anti-malware engines use both signature and heuristic-based techniques to identify and block malware within a network.

Network Security 52

Network Security Network Networking UDP port 52

CATO Networks

MARCH 24, 2020

The Server Message Block (SMB) protocol is essential for Windows network file and print sharing. There is no reason, for example, that a client system from your finance department should have network access to systems in human resources via the Windows SMB protocol. This would solve the problem for SMB servers but not SMB clients.

SMB 52

SMB Port Server Protocol 52

Kentik

OCTOBER 2, 2015

Kentik Detect customers use alerts to monitor various metrics in the data that is ingested into the Kentik Data Engine (KDE), including information on devices, interfaces, IP/CIDR, Geo, ASN, and ports. Define a TCP Syn alert based on the queries provided in Defining an Alert below. protocol = 6. Example primary query: select.

Port 40

Port Protocol Server Bandwidth 40

Kentik

MARCH 13, 2019

For example, during an attack, service provider network engineers need to be skilled at finding attacks, choosing an appropriate mitigation strategy, and have proper access to the infrastructure to apply it. IP Protocol. Destination Prefix. Source Prefix. Destination port. Source port. Packet length.

IP Address 49

IP Address Port Routers DNS 49

Kentik

JUNE 19, 2017

This data — flow records or datagrams, depending on the protocol — is generated by network devices such as routers and switches. The unsummarized flow data is ingested in real time into the Kentik Data Engine (our scale-out backend) where it’s ready for ad hoc analytics and visualization. ")/fuzz(TCP()) s.send(pe).

Routers 40

Routers TCP Network Networking 40

CATO Networks

SEPTEMBER 11, 2023

allow users on the corporate VLAN to access printers located in the printer VLAN, over specific TCP ports. allow database synchronization across two VLANs located in separate datacenter rooms over a specific protocol/port. allow IOT devices (e.g.

LAN 52

LAN Cloud Firewall WAN 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. These packet retransmits introduce latency.

Cloud 116

Cloud TCP Routers Protocol 116

CloudFaire

DECEMBER 9, 2024

Google is far and away the most popular search engine globally, across all platforms. 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. On mobile devices and operating systems, Baidu is a distant second.

Internet 72

Internet Email IP Address TCP 72

Kentik

DECEMBER 18, 2017

That’s how much flow data is ingested by Kentik Data Engine (KDE), the distributed big data backend that powers Kentik Detect®. IP Versions and Internet Protocols. UDP (protocol 17) is down in the number 5 spot with only 3.2% of the traffic, and ICMP (protocol 1) comes in right behind it with 2.7%.

Protocol 40

Protocol UDP port Port TCP 40