Kentik

OCTOBER 4, 2021

According to a statement published last night, Facebook Engineering wrote, “Configuration changes on the backbone routers that coordinate network traffic between our data centers caused issues that interrupted this communication.” So what happened? billion users attempting in vain to reconnect to their services.

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TCP DNS Server Media 145

Network Engineering

JANUARY 10, 2025

I have used ssh -w n:n to create a tunnel between tun0 (IP 10.42.0.1 on A) and tun0 (IP 10.42.0.2 on B), and between tun1 (IP 10.42.0.3 on A) and tun1 (IP 10.42.0.4 sudo iptables -t mangle -A PREROUTING -d 239.0.0.2 --protocol udp --destination-port 23000 -j TEE --gateway 172.19.0.2 sudo ip route add 172.19.0.2

IP Address 52

IP Address Port Gateway Protocol 52

NW Kings

DECEMBER 11, 2024

Network Class Address is crucial for organizing and managing IP addresses. This blog will delve into the various aspects of network class addresses, focusing on IPv4 , subnetting , and the differences between the classes. What is an IP Address? There are two main types of IP addresses: IPv4 and IPv6.

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IP Address Network Networking Internet 40

Kentik

OCTOBER 12, 2021

When companies started outsourcing the hosting of their websites to the likes of Akamai and AWS, network teams learned quickly that many work- and non-work related applications shared the same IP address. The Internet Engineering Task Force (IETF) is also working toward changes that will impact pervasive monitoring.

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Encryption DNS IP Address Protocol 84

NW Kings

DECEMBER 10, 2024

NOTE : Join the Network Engineer Master’s Program by Network Kings today. TCP ports operate at the transport layer of the Internet Protocol Suite. When a device wants to communicate with another device, it requires an IP address and a port number to establish a connection. What is User Datagram Protocol (UDP)?

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UDP port Port TCP IP Address 40

Kentik

FEBRUARY 8, 2023

With traffic telemetry, engineers can gain real-time visibility into traffic patterns, correlate events, and make predictions of future traffic patterns. With port mirroring, an engineer can monitor the traffic on specific ports or VLANs, which is especially useful for identifying issues with specific devices or applications.

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Network Networking Port IP Address 111

The Network DNA

JUNE 28, 2024

If BFD identifies a failure in the bidirectional channel connecting two forwarding engines, which includes interfaces and data links, the member link is deleted from the forwarding table. The detection of micro BFD happens only when Link Aggregation Control Protocol (LACP) in COLLECTIING_DISTRIBUTION is in active state. 255.255.255.0

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Port IP Address WAN Bandwidth 52

Kentik

NOVEMBER 4, 2018

In addition to basic data like source and destination IP address, port, protocol, etc., We also utilize nom , an excellent Rust parser combinator library, for high-performance decoding of application layer protocols like DHCP, DNS, and HTTP. Rust’s performance and low memory use is a key benefit here.

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IP Address Protocol TCP DNS 67

Confluent

MAY 22, 2019

What protocols do the devices use to communicate? For delivering this data one widely used protocol is MQTT. MQTT is a lightweight messaging protocol for pub/sub communication typically used for Machine-to-Machine (M2M) communication. You will also need to create a Google App Engine application ID for the project.

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IoT Protocol Application Internet 98

CATO Networks

JANUARY 29, 2018

This can be done by disrupting the process of joining and communicating with the crypto mining pool either by blocking the underlying communication protocol or by blocking crypto mining pool addresses and domains. For a list of addresses and domains, you should block, click here.

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Blockchain Encryption IP Address Firewall 52

Kentik

APRIL 25, 2016

Here at Kentik, we’ve applied many of the same concepts to Kentik Data Engine™ (KDE), a datastore optimized for querying IP flow records (NetFlow v5/9, sFlow, IPFIX) and related network data (GeoIP, BGP, SNMP). In this series, we’ll take a tour of KDE and also quantify some of its performance and scale characteristics.

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Engineering Routers Protocol IP Address 40

Kentik

AUGUST 14, 2017

Classifying Network Interfaces Enhances Engineering and Business Insights. Given that Kentik was founded primarily by network engineers, it’s easy to think of our raison d’etre in terms of addressing the day-to-day challenges of network operations. The problem arises because flow records (NetFlow, sFlow, IPFIX, etc.)

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IP Address Routers Network Networking 40

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. This includes elements like IP address, subnet, username, group membership, hostname, remote user, site, and more.

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SASE Cloud Port Firewall 52

CATO Networks

JULY 18, 2018

Today, Cato introduced the first, identity-aware routing engine for SD-WAN. Legacy networks route traffic based on IP address or subnet, information that bears little resemblance to the business. Segment-specific protocol acceleration technologies maximizes global throughput.

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WAN IP Address MPLS Cloud 52

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. For destination-based RTBH, the victim’s destination IP address becomes completely unreachable. IP Protocol.

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IP Address Port Routers DNS 49

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. In the logs, you can identify suspicious or unauthorized access attempts, unusual traffic patterns, or communication with blacklisted IP addresses.

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Cloud Gateway Port IP Address 97

CATO Networks

DECEMBER 16, 2024

Advanced anomaly detection engine to identify unusual data movement patterns that deviate from normal behavior. They typically gain initial access through phishing emails, social engineering, supply chain attacks, and Remote Desktop Protocol (RDP) exploits.

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SMB IP Address SASE Protocol 40

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.

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Network Security Network Networking UDP port 52

CATO Networks

MAY 23, 2024

This encrypted packet is then encapsulated within the VPN protocol layer, allowing secure communication with the VPN server. Option 121, also known as the Classless Static Route Option, allows network administrators to define classless static routes for clients, specifying routes with both the destination subnet and the gateway address.

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VPN Dynamic Host Configuration Protocol IP Address Server 52

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. IP Routings Historical Baggage: Simplistic Data Plane Whether the traffic is voice, video, HTTP, or email, the Internet is made of IP packets.

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Internet Routers MPLS Protocol 52

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.

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Network Security Network Networking UDP port 52

Kentik

FEBRUARY 14, 2023

Through instrumentation, integrations, automated analysis, visualizations, and a full suite of data management features, data platforms offer data managers and engineers a unique opportunity to interact with distributed data at a scale that would otherwise exist in siloed data infrastructures.

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Network Networking Engineering Microsegmentation 52

CATO Networks

JANUARY 17, 2018

The University of Pennsylvania, for example, uses network scanning in the study of global trends in protocol security. However, while research projects will stop at scanning Internet IP-ranges for potentially open services, malicious actors will go further and attempt to hack or even gain root privilege on remote devices.

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Network Networking Server Port 52

Kentik

OCTOBER 25, 2016

This appliance then signals the network, via network control plane or element management protocols, to either drop traffic at the network edge or redirect traffic to a private or public cloud mitigation device. In the prevailing appliance-based model, an out-of-band appliance detects attacks based on NetFlow, sFlow, IPFIX, and BGP data.

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IP Address Network Networking Protocol 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.

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TCP Protocol Port IP Address 40

CATO Networks

NOVEMBER 20, 2019

Your tools will be the stock-and-trade of any network engineer: access to your network, a way to capture traffic, like a tap sensor, and enough disk space to store a weeks worth of packets. Since most firewall configurations allow HTTP and TLS to any address, many bots use these protocols to communicate with their targets.

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Network Networking Protocol IP Address 52

Kentik

MAY 15, 2023

In addition, as part of his analysis, Mattias shared interesting observations about the DDoS threat landscape spanning both volume/sized-based and network protocol attacks. If it had been globally circulated, it could have caused disruptions to Orange customers using that IP address range.

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Network Networking Internet IP Address 52

Kentik

APRIL 18, 2016

While NetFlow v9 and it’s follow-on protocol IPFIX offer tremendous flexibility there are some tradeoffs including complexity of implementation and the fact that a template must be received before the underlying flow data records can be correctly understood. The sFlow difference. Kentik KFlow.

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Protocol Routers Encryption IP Address 40

Kentik

APRIL 24, 2017

Comparing flow protocols for real-world large-scale networks. A lot of ink has been spilled over the years on the topic of flow protocols, specifically how they work and their relative accuracy. One of the things that can be rather confusing is that there are a lot of different flow protocol names.

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Protocol Routers Bandwidth Internet 40

Kentik

JULY 20, 2018

NetFlow is a protocol that was originally developed by Cisco to help network operators gain a better understanding of their network traffic conditions. Monitor for anomalous traffic using multiple data dimensions such as the source geography of the traffic, destination IPs, and common attack ports. Sumo Logic. Cisco Tetration.

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Routers IP Address Protocol Server 40

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. protocol = 6. Example primary query: select. all_devices where. and tcp_flags = 2. AND i_device_type !=

Port 40

Port Protocol Server Bandwidth 40

CATO Networks

DECEMBER 17, 2019

Packet-filtering firewalls Traditional firewalls that block traffic at the protocol, port, or IP address levels. Limited scalability NGFWs and UTMs have a limited amount of capacity to run engines for anti-malware, IPS, and secure web gateway (SWG). Multiple security engines and DPI are baked-in to the network.

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Firewall Network Networking SASE 52

Kentik

JANUARY 3, 2018

New data streams, protocols, security guidelines, and backup procedures challenge network and security operations staff. Network analytics has the power to examine details of the IoT communications patterns made through various protocols and correlate these to data paths traversed throughout the network.

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IoT Network Networking Protocol 40

CATO Networks

APRIL 19, 2017

Easy and Rapid Configuration For years, WAN engineering has meant learning CLIs and scripts, mastering protocols like BGP, OSPF, PBR, and more. Some companies lack the internal engineering expertise, others have the expertise, but far too many elements in their networks. but lets not get picky) with multipoint IPsec tunnels.

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WAN MPLS Wide Area Network Firewall 40

Kentik

MARCH 6, 2019

However, this type of networking model with a flat IP network across the entire Kubernetes cluster creates new challenges for network engineering and operates teams. Google Compute Engine (GCE) - all pods can reach each other and can egress traffic to the internet. Open Virtual Networking (OVN) (Open vSwitch community).

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Network Networking Application Cloud 63

Kentik

JUNE 28, 2023

It’s one thing to say, “My Kubernetes clusters should not be communicating with external IP addresses,” or “unencrypted HTTP or FTP traffic should not appear in these specific network zones.” This helps in fortifying the security posture and addressing vulnerabilities proactively. It is another thing to enforce these rules.

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Port Airlines Network Networking 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. In the table’s “key” column (at left) we see the IP addresses of those elements along with their corresponding hostnames (also anonymized).

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Network Networking TCP IP Address 40