Kentik

OCTOBER 4, 2021

Included in the withdrawn prefixes were the IP addresses of Facebook’s authoritative DNS servers, rendering them unreachable. For example, in IPv4, Facebook authoritative server a.ns.facebook.com resolves to the address 129.134.30.12 which is routed as 129.134.30.0/24 24 and 129.134.30.0/23.

TCP 145

TCP DNS Server Media 145

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. Where is the DNS? This would cut time off the test.

IP Address 98

IP Address DNS TCP Application 98

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

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. Getting all the DNS logs is often impractical. Is Google hijacking DNS with DoH? Well, that didn’t last long.

Encryption 84

Encryption DNS IP Address Protocol 84

Kentik

JANUARY 28, 2021

Who did this IP address talk to? While synthetics can be triggered or collected via device telemetry interfaces, they are actually a broader category spanning client and server endpoints, network elements, and internet-wide locations performing network and application-layer testing. What IP addresses were affected?”

Network 72

Network Networking DNS IP Address 72

Network Engineering

AUGUST 19, 2020

WAN > OPNsense (in ESXi)> switch (C3560G) OPNsense is DHCP server Thing is that i would like the switch to deal with the DHCP, to avoid being naked when ESXi needs maintenance. Also need to setup a VPN on OPNsense but will that be possible if 3560 is acting as the DHCP server? ip dhcp pool mgmt network 10.0.0.0

IP Address 52

IP Address DNS Routers Server 52

Kentik

DECEMBER 13, 2021

To properly monitor them, it’s paramount to find out which servers your end users are connecting to. 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.

Application 95

Application DNS Routers Server 95

Kentik

MARCH 20, 2019

Application and server performance in the cloud. DDI management (DNS, DHCP, and IP addressing), network monitoring configuration, and routing are also very frequently automated. Network performance between cloud workloads. However, network security monitoring is less often automated,” notes EMA.

Engineering 102

Engineering Cloud Network Networking 102

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

Kentik

MAY 24, 2023

This switch happens and is decided on the server side, not the client. The end user to embedded server cluster mapping Failure scenarios and how to secure that the event can run smoothly in the case of failures in the network. In the recent blog posts, we detailed the most common ways CDNs map end users to the correct cache location.

Internet 98

Internet IP Address DNS Server 98

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. This is because much like an on-premises network, each cloud is a restricted network full of routers, switches and servers that can stretch the entire globe.

Cloud 124

Cloud Network Networking Gateway 124

Kentik

APRIL 19, 2023

Sometimes there is a perception that the embedded solution is about saving money for space and power needed to host the servers, but this is mostly a misunderstanding. The business case can directly compare the saved cost and the estimated cost of space and power for the embedded servers. Let’s have a look at the third case.

IP Address 52

IP Address DNS Server Network 52

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

Akins IT

OCTOBER 17, 2018

On-net / Off-net Filtering Content filtering persists even while the devices are off-net, and new or updated EMS profiles can be pushed out to these devices so long as they can communicate with the EMS server. For off-net devices, this is achieved by having a public DNS entry exactly as the servers FQDN.

IP Address 52

IP Address Server DNS 52

NW Kings

DECEMBER 10, 2024

A TCP port is a unique number assigned to specific services and applications that run on a server. It serves as an endpoint for communication between a client and the server, allowing different communication processes over a network. This combination directs network traffic to the appropriate service or application running on a server.

UDP port 40

UDP port Port TCP IP Address 40

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. If the latency is the destination server, I might be out of luck. This in turn will help us understand how optimizations can be made that will minimize the problems introduced by it.

TCP 116

TCP Routers Bandwidth IP Address 116

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 !

VPN 52

VPN IP Address Encryption TCP 52

Kentik

MARCH 7, 2023

Often this is the first tier of “enriching the data,” where correlations between network details like IP addresses, DNS names, application stack tags, and deployment versions can be made.

Network 99

Network Networking Cloud Engineering 99

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

CATO Networks

AUGUST 17, 2021

CDN Content Delivery Network (CDN) is a geographically distributed network of servers that serve cached copies of web content. CDNs improve a websites performance by moving the service closer to end users and decreasing the load on the origin server. DNS The Domain Name Service (DNS ) is the address book of the Internet.

Network 52

Network Networking NaaS SASE 52

Kentik

MARCH 15, 2023

These attacks typically seek out web server vulnerabilities with malformed or high-volume requests in layer 7 services. The attacker can spoof IP addresses, DNS, HTTPS headers, and more to deceive users into interacting with compromised applications. Prevent risky IP addresses from interacting with your network.

Network 94

Network Networking Protocol IP Address 94

Kentik

JUNE 4, 2019

Kentik has built an engine that maintains a curated list of the source and destination IPs associated with these CDNs, so our flow records from their traffic include not just source or destination IP address but also the actual CDN names. Are my subscribers getting content from the nearest possible servers?

DNS 56

DNS Server Internet Network 56

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, It works fine!

Port 101

Port IaaS DNS Network 101

Confluent

OCTOBER 4, 2019

Then, the following command should return successfully: kafka-broker-api-versions --command-config kafka.properties --bootstrap-server kafka:9071. Determine the external IP addresses from the kubectl get services -n operator “EXTERNAL-IP” column: NAME TYPE CLUSTER-IP EXTERNAL-IP kafka ClusterIP None.

IP Address 16

IP Address Server DNS Engineering 16

Engineering at Meta

MAY 3, 2023

The malware gains access to this information by making requests from the targeted user’s computer to the APIs used by our Facebook web and mobile apps, which masquerades its activity behind the user’s actual IP address, cookie values, and system configuration – appearing like a legitimate user and their session.

Cookie 116

Cookie Internet JavaScript Media 116

High Scalability

NOVEMBER 12, 2019

PA File Sight - Actively protect servers from ransomware , audit file access to see who is deleting files , reading files or moving files, and detect file copy activity from the server. PerfOps is a data platform that digests real-time performance data for CDN and DNS providers as measured by real users worldwide.

Education 9

Education Advertising JavaScript Server 9

High Scalability

JUNE 27, 2019

PA File Sight - Actively protect servers from ransomware , audit file access to see who is deleting files , reading files or moving files, and detect file copy activity from the server. PerfOps is a data platform that digests real-time performance data for CDN and DNS providers as measured by real users worldwide.

Advertising 9

Advertising Server Engineering IP Address 9

High Scalability

OCTOBER 15, 2019

PA File Sight - Actively protect servers from ransomware , audit file access to see who is deleting files , reading files or moving files, and detect file copy activity from the server. PerfOps is a data platform that digests real-time performance data for CDN and DNS providers as measured by real users worldwide.

Education 8

Education Advertising JavaScript Server 8

High Scalability

OCTOBER 29, 2019

PA File Sight - Actively protect servers from ransomware , audit file access to see who is deleting files , reading files or moving files, and detect file copy activity from the server. PerfOps is a data platform that digests real-time performance data for CDN and DNS providers as measured by real users worldwide.

Education 8

Education Advertising JavaScript Server 8

High Scalability

JANUARY 7, 2020

PA File Sight - Actively protect servers from ransomware , audit file access to see who is deleting files , reading files or moving files, and detect file copy activity from the server. PerfOps is a data platform that digests real-time performance data for CDN and DNS providers as measured by real users worldwide.

Education 8

Education Advertising JavaScript Server 8

High Scalability

DECEMBER 12, 2019

PA File Sight - Actively protect servers from ransomware , audit file access to see who is deleting files , reading files or moving files, and detect file copy activity from the server. PerfOps is a data platform that digests real-time performance data for CDN and DNS providers as measured by real users worldwide.

Education 8

Education Advertising JavaScript Server 8

Kentik

NOVEMBER 23, 2015

DoS becomes DDoS when the source of the attack is distributed, meaning that the attack comes from more than one unique IP address. 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.

IP Address 40

IP Address Port Protocol Internet 40

CATO Networks

JULY 31, 2017

The Cato IPS identifies and block such threats by inspecting the data stream to determine the actual filetype. DNS Queries and Activatio n: By investigating the DNS stream, the Cato IPS ca n run heuristics to detect anomalies in DNS queries indicating a domain generation algorithm (DGA) or malware-related DNS queries.

WAN 40

WAN Wide Area Network DNS Encryption 40

High Scalability

JULY 19, 2019

PA File Sight - Actively protect servers from ransomware , audit file access to see who is deleting files , reading files or moving files, and detect file copy activity from the server. PerfOps is a data platform that digests real-time performance data for CDN and DNS providers as measured by real users worldwide.

Education 9

Education Advertising Server Engineering 9

High Scalability

JULY 10, 2019

PA File Sight - Actively protect servers from ransomware , audit file access to see who is deleting files , reading files or moving files, and detect file copy activity from the server. PerfOps is a data platform that digests real-time performance data for CDN and DNS providers as measured by real users worldwide.

Advertising 8

Advertising Server Engineering IP Address 8

High Scalability

AUGUST 20, 2019

PA File Sight - Actively protect servers from ransomware , audit file access to see who is deleting files , reading files or moving files, and detect file copy activity from the server. PerfOps is a data platform that digests real-time performance data for CDN and DNS providers as measured by real users worldwide.

Education 8

Education Advertising Server Engineering 8

High Scalability

AUGUST 6, 2019

PA File Sight - Actively protect servers from ransomware , audit file access to see who is deleting files , reading files or moving files, and detect file copy activity from the server. PerfOps is a data platform that digests real-time performance data for CDN and DNS providers as measured by real users worldwide.

Education 8

Education Advertising Server Engineering 8