Kentik

JANUARY 24, 2022

Source IP address. Destination IP address. IP protocol. IP type of service. Lots of applications use these ports today, including DNS lookups and email. This is because the most popular IP addresses sourcing traffic on networks resolve to hosting services or they don’t resolve at all!

Application 96

Application IP Address DNS Port 96

AWS Architecture

OCTOBER 16, 2024

In Part 2, well achieve an arguably superior solution using Domain Name System (DNS) resolution. Using a DNS to resolve the address for WebLogic admin server Lets look at the reference WebLogic deployment architecture on AWS shown in Figure 1. For this simple example, there is only one WebLogic domain and one admin server.

DNS 56

DNS Server IP Address Internet 56

CloudFaire

MARCH 19, 2025

However, given our architecture design, we have primarily handled private network application access (applications tied to private IP addresses or hostnames) through the network firewall component of our Secure Web Gateway (SWG) service, Cloudflare Gateway. Any device or virtual machine will have a private IP address.

Application 86

Application IP Address Gateway DNS 86

Cloudera Blog

FEBRUARY 12, 2024

In Cloudera deployments on public cloud, one of the key configuration elements is the DNS. If the DNS is set up less ideal than it could be, connectivity and performance issues may arise. In this blog, we’ll take you through our tried and tested best practices for setting up your DNS for use with Cloudera on Azure.

DNS 52

DNS IP Address Server Firewall 52

Network Engineering

APRIL 23, 2014

5) hostname ciscoasa enable password uXZJvr7TNDFcspD4 encrypted passwd uXZJvr7TNDFcspD4 encrypted names interface Ethernet0/0 switchport access vlan 2 interface Ethernet0/1 interface Ethernet0/7 switchport access vlan 5 interface Vlan1 nameif inside security-level 100 ip address 192.168.1.1 dns-server value 1.inside.dc.ip.1

IP Address 130

IP Address VPN DNS Encryption 130

Network Engineering

JULY 3, 2021

interface Vlan1 nameif inside security-level 100 ip address 192.168.1.1 interface Vlan2 nameif outside security-level 0 ip address dhcp setroute ! interface Ethernet0/4 ! interface Ethernet0/5 ! interface Ethernet0/6 ! interface Ethernet0/7 ! 255.255.255.0 !

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VPN IP Address Encryption TCP 130

Kentik

JANUARY 10, 2022

Domain lookup time : When a connection is made to a domain, the local operating system must first reach out to the DNS to resolve that hostname to an IP address. Where is the DNS? Is your PC using a DNS on the same local area network as your computer? This would cut time off the test.

DNS 98

DNS IP Address TCP Application 98

ByteByteGo

NOVEMBER 23, 2024

share one router with a single public IP address. The request contains the device's private IP address. The router’s NAT process replaces the private IP with the router’s public IP. NAT has several important uses: It helps conserve public IP addresses.

IP Address 100

IP Address Routers Internet Server 100

Kentik

AUGUST 21, 2017

Dashboards for DNS Metrics Reveal Issues With Your Infrastructure. Working behind the scenes, Domain Name Server (DNS) is often overlooked, but it’s one of the most critical pieces of the Internet infrastructure. That point was driven home by the Mirai DDoS attack last October against the DNS infrastructure of Dyn, Inc.

DNS 40

DNS Server IP Address Ethernet 40

NW Kings

MARCH 25, 2025

The exam covers topics like: Network Fundamentals: IP addressing, subnetting, OSI model , TCP/IP model, network topologies, cabling. IP Connectivity: Routing protocols (OSPF, EIGRP), static routing, inter-VLAN routing. IP Services: DHCP, DNS, NAT, QoS.

Protocol 52

Protocol IP Address Topology Network 52

Kentik

OCTOBER 4, 2021

Included in the withdrawn prefixes were the IP addresses of Facebook’s authoritative DNS servers, rendering them unreachable. During the outage, the TCP traffic went away entirely, leaving a small amount of UDP traffic consisting of DNS retries from Facebook’s 3.5

TCP 145

TCP DNS Server Media 145

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. Getting all the DNS logs is often impractical. Is Google hijacking DNS with DoH? What is NPM?

Encryption 84

Encryption DNS IP Address Protocol 84

Kentik

JANUARY 28, 2021

Who did this IP address talk to? How metadata lets you ask better questions: “Who did this IP address attack?” becomes “What users or hosts were attacked from this IP address? Was this IP address part of my production infrastructure, or was it one of my users or customers?”. Am I under attack?

Network 72

Network Networking DNS IP Address 72

CloudFaire

MARCH 18, 2025

Today, one of the greatest challenges that cyber defenders face is analyzing detection hits from indicator feeds, which provide metadata about specific indicators of compromise (IOCs), like IP addresses, ASNs , domains, URLs, and hashes. On average, we process 71 million HTTP requests per second and 44 million DNS queries per second.

IP Address 66

IP Address Internet Email Network 66

Kentik

JANUARY 7, 2020

Customers use our inbound APIs to send us various types of data, including threat feeds, DNS data, scoring data, or even physical topology data. Automatic DNS resolution option for IP addresses in Grafana. The new enhancements include: Autocompletion of metrics and filters in queries. Adding webpack for a newer framework.

DNS 16

DNS IP Address Topology DevOps 16

Kentik

MARCH 20, 2019

DDI management (DNS, DHCP, and IP addressing), network monitoring configuration, and routing are also very frequently automated. However, NetOps teams note they do want to maintain manual control over some network engineering and configuration tasks, acording to the EMA research. A Modern Approach to Multi-Cloud Networking.

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Engineering Cloud Network Networking 102

CloudFaire

MARCH 18, 2025

For example, HTTP requests contain information about the client such as their IP address, request method, autonomous system (ASN) , request paths, and TLS versions used. Cloudflare log data is diverse, reflecting the breadth of capabilities available. Read on for examples of how to use these logs to identify common threats.

Gateway 67

Gateway IP Address Application DNS 67

Kentik

MAY 2, 2018

They can then announce the routes (groups of IP addresses) that they own from their ASN. During a BGP route hijack, an attacker advertises IP prefixes from an ASN that is not the normal originator. This causes legitimate traffic to those IPs to be redirected to the attacker.

IP Address 49

IP Address DNS UDP port Advertising 49

DoorDash Engineering

JANUARY 16, 2024

Custom multi-cluster service discovery: Our custom service discovery solution, DoorDash data center Service Discovery, or DDSD, provides a custom DNS domain to support multi-cluster communication. Clients leverage DNS names to dynamically discover all pod IP addresses of desired services.

Cloud 84

Cloud IP Address DNS Routers 84

Kentik

AUGUST 3, 2021

For example, some DevOps teams feel that AWS is more ideal for infrastructure services such as DNS services and load balancing. Companies take advantage of multiple clouds for a few reasons: Different cloud providers are better at different services. Google, on the other hand, might be a better platform for machine-learning computations.

Cloud 124

Cloud Network Networking Gateway 124

Kentik

DECEMBER 13, 2021

This is sort of a long shot, but are you using a corporate DNS server? You might try temporarily switching to a public DNS like Google’s 8.8.8.8. DNS lookups can introduce significant latency on new connections. Shut them down and try working with my SaaS application after making some or all of the above changes.

Application 95

Application DNS Routers Internet 95

Kentik

APRIL 19, 2023

A little about BGP: BGP is used to signal to a cache which IP ranges it should serve A setup where all caches have identical announcements will work for most deployments since the next tie-breaker is the geolocation information for the end user’s IP address. Prefixes are sent from the ISP to the caches. 0/24 is announced to B 1.

DNS 52

DNS IP Address Server Network 52

Kentik

MAY 8, 2023

TCP/IP is one of the fundamental networking protocols and the basis for common protocols like HTTP. IP address abstraction and failover capabilities with DNS Domain Name System (DNS) is a system for mapping domain names to IP addresses.

Network 52

Network Networking IP Address TCP 52

Kentik

MAY 24, 2023

As we discussed in the previous posts, location is defined by the location of the DNS resolver used by the end user or the end user’s IP address. In the latter case, it is signaled using BGP by the ISP, which caches should be prioritized for end users in which IP prefixes.

Internet 98

Internet IP Address DNS Server 98

Kentik

SEPTEMBER 20, 2021

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. This allows NetOps teams to identify the specific IP addresses the tests need to be run against, as well as the locations where the tests need to be executed from.

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TCP Routers Bandwidth IP Address 116

Kentik

MARCH 13, 2019

For destination-based RTBH, the victim’s destination IP address becomes completely unreachable. The victim can update DNS to point at a different IP address in an attempt to get their application back up. The victim can update DNS to point at a different IP address in an attempt to get their application back up.

IP Address 49

IP Address Port Routers DNS 49

Kentik

JULY 28, 2021

Performing a TCP traceroute to IP addresses and host names is just the beginning. Kentik Synthetics can be used to verify availability of specific content in web pages, test DNS servers to make sure they are responding in a timely manner, monitor the availability and responsiveness of API endpoints, and much more.

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Cloud TCP Routers Protocol 116

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 NDNA-ASA(config)# dhcpd option 3 ip 10.10.10.1 Cisco ASA in a Network Configuring DHCP, AAA, and SSH NDNA-ASA(config)# dhcpd address 10.10.10.3-10.10.10.100

Firewall 52

Firewall IP Address VPN Port 52

The Network DNA

JULY 9, 2024

255.255.255.252 C8000-NDNA(config-if)# no ip redirects C8000-NDNA(config-if)# ip tcp adjust-mss 1360 C8000-NDNA(config-if)# arp timeout 1200 C8000-NDNA(config-if)# exit C8000-NDNA(config)# ip route 0.0.0.0 x Free Tools.

Routers 52

Routers IP Address MPLS WAN 52

CloudFaire

DECEMBER 9, 2024

Routing security, measured as the share of RPKI valid routes and the share of covered IP address space, continued to improve globally throughout 2024. increase in RPKI valid IPv4 address space in 2024, and a 6.4% public DNS resolver from millions of users around the world. We saw a 4.7% Email Security An average of 4.3%

Internet 96

Internet Email IP Address TCP 96

Kentik

APRIL 5, 2023

BGP: BGP is used to signal to a cache which IP ranges it should serve A setup where all caches have identical announcements will work for most deployments since the next tie-breaker is the geolocation information for the end user’s IP address. The typical DNS-based flow for a content server by a CDN looks like this: 1.

Network 52

Network Networking DNS IP Address 52

Akins IT

OCTOBER 17, 2018

For off-net devices, this is achieved by having a public DNS entry exactly as the servers FQDN. This would then resolve to your public IP and NATd to the EMS servers private IP (The FortiClient Web Filter Extension communicates with the EMS server via its hostname, not IP address).

IP Address 52

IP Address Server DNS 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.

IP Address 67

IP Address Protocol TCP DNS 67

Confluent

JULY 1, 2019

are shown indented in the following list: KAFKA_LISTENERS is a comma-separated list of listeners and the host/IP and port to which Kafka binds to for listening. For more complex networking, this might be an IP address associated with a given network interface on a machine. on AWS, etc.) The default is 0.0.0.0,

Port 101

Port IaaS DNS Network 101

CATO Networks

AUGUST 17, 2021

Each AS advertises which IP addresses it can route traffic to, helping traffic move from its source AS to the AS closest to its destination. DNS The Domain Name Service (DNS ) is the address book of the Internet. OSPF The Open Shortest Path First (OSPF) protocol is designed to route traffic within an AS.

Network 52

Network Networking NaaS SASE 52

NW Kings

DECEMBER 10, 2024

When a device wants to communicate with another device, it requires an IP address and a port number to establish a connection. NOTE: Learn about TCP/IP Model and get an overview on How the internet works. What is the role of IP address and port number? How does the TCP port work?

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UDP port TCP Port IP Address 40

High Scalability

APRIL 16, 2019

After slave promotion, the Resource Agent triggers a DNS rerouting module. The module updates the proxy DNS entry with the IP address of the new master, thus, facilitating all application writes to be redirected to the new master. Pacemaker also sets up the available slaves to start replicating from this new master.

DNS 59

DNS IP Address Application Network 59