The Network DNA

JUNE 10, 2024

It's an essential component that keeps track of the mapping between real IP addresses and their translated (mapped) counterparts. This table is required for the firewall to maintain and translate private IP addresses to public ones, allowing communication over the internet. TCP, UDP, ICMP). TCP, UDP, ICMP).

Firewall 52

Firewall IP Address TCP Port 52

Kentik

OCTOBER 4, 2021

Included in the withdrawn prefixes were the IP addresses of Facebook’s authoritative DNS servers, rendering them unreachable. Before the outage, UDP delivering traffic-intensive video dominated the volume of traffic volume while TCP constituted a minority. billion users attempting in vain to reconnect to their services.

TCP 145

TCP DNS Server Media 145

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. Ask yourself, do you want your test to query the DNS every time the test executes, or should it use the same IP address from the last test? Where is the DNS?

IP Address 98

IP Address DNS TCP Application 98

Network Engineering

DECEMBER 16, 2015

Our Outside interface and DMZ interfaces have routable IP addresses and DMZ subnet is routed via IP address of the outside interface. interface GigabitEthernet0/0 nameif outside security-level 0 ip address 123.123.6.243 255.255.255.248 interface GigabitEthernet0/1 nameif inside security-level 50 ip address 192.168.50.4

IP Address 52

IP Address Port TCP Server 52

Network Engineering

SEPTEMBER 26, 2015

interface GigabitEthernet0/0 no ip address duplex auto speed auto ! encapsulation dot1Q 10 ip address 192.168.10.1 ip nat inside ! encapsulation dot1Q 20 ip address 192.168.20.1 ip nat inside ! encapsulation dot1Q 30 ip address 192.168.30.1 ip nat inside ! ip nat inside !

IP Address 52

IP Address TCP Internet Networking 52

The Network DNA

JUNE 3, 2024

The internal load balancer is assigned a private IP address from the virtual network's subnet range for the frontend and targets the private IP addresses of backend services (often Azure virtual machines). We can select options for Public IP address (new or existing), SKU, assignment, and IPv6.

IP Address 52

IP Address Port Protocol Virtual machine 52

Kentik

FEBRUARY 27, 2023

Now you can quickly filter an extensive database on specific parameters such as time range, various data sources and types, and hundreds of dimensions such as IP addresses, ASNs, application and security tags, container information, the fields inside VPC flow logs, and much more.

Networking 98

Networking Network TCP IP Address 98

Kentik

MAY 21, 2019

In this blog post, we outline how Race Communications was able to leverage Kentik’s powerful network analytics to identify malicious traffic associated with Mirai, determine which of Race Communications’ customer IP addresses were being exploited by the botnet, and ultimately, save its online IP reputation.

Port 81

Port IP Address Internet Networking 81

Kentik

MAY 8, 2023

Message integrity and guaranteed delivery with TCP/IP Because IP does not require acknowledgments from endpoints, it does not ensure delivery; therefore, it is considered an unreliable protocol. On the other hand, Transmission Control Protocol (TCP) provides a connection-based, reliable byte stream.

Networking 52

Networking Network IP Address TCP 52

NW Kings

DECEMBER 16, 2024

This blog will explore the key protocols within the transport layer, focusing on TCP ( Transmission Control Protocol ) and UDP (User Datagram Protocol) in detail. This layer operates on two primary protocols: TCP and UDP , each serving different purposes in data transmission. What is the Transport Layer?

Protocol 40

Protocol TCP Port Networking 40

Kentik

SEPTEMBER 10, 2021

If I don’t like the results from the above, I might launch a ping or a TCP traceroute to see if I get any packet loss or high-latency responses. In the picture above, by mousing over the little green circles at the bottom, the IP address of the hops are listed.

Application 113

Application Cloud Routers IP Address 113

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

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

Kentik

APRIL 3, 2023

event(data) duration = float(event) / 1000000 print("TCP retransmit detected (duration: %0.2f You can modify the program to capture other information as well, such as the number of retransmit attempts or the source and destination IP addresses of the affected packets. tcpdrop allows you to trace TCP packet drops.

TCP 110

TCP Application Virtual machine Networking 110

CATO Networks

AUGUST 11, 2020

The natural latency of the great distance is only exacerbated by TCP inefficiencies as well as public Internet routing. The TCP handshake would take an extraordinarily long time. When the worker in India sends their traffic to the datacenter, TCP will send an acknowledgement that the traffic arrived as expected.

TCP 52

TCP IP Address Internet Application 52

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 ! dhcpd address 192.168.1.5-192.168.1.254 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

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.

IP Address 67

IP Address Protocol TCP DNS 67

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

JUNE 7, 2023

They capture detailed information about network traffic, including: Source and destination IP addresses Ports Protocols Packet counts By analyzing these logs, you can gain visibility into the volume, patterns, and characteristics of traffic, such as whether it’s being dropped or incorrectly routed, to identify connectivity issues.

Cloud 97

Cloud Gateway Port IP Address 97

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. HTTP is the new TCP. This made accurately monitoring latency and packet loss to some applications impossible.

Encryption 84

Encryption DNS IP Address Protocol 84

CATO Networks

AUGUST 18, 2022

This includes elements like IP address, subnet, username, group membership, hostname, remote user, site, and more. Included features like QoS, TCP Acceleration, and Packet Loss Mitigation allow customers to fine-tune performance to their needs. Cato Network Rules are pre-defined to meet common use-cases.

SASE 52

SASE Cloud Port Firewall 52

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 Networking DNS 101

CATO Networks

JULY 18, 2018

Legacy networks route traffic based on IP address or subnet, information that bears little resemblance to the business. Catos Affordable HA carries no additional recurring charge and deployment is simple with zero-touch provisioning and needing just a private or public IP address.

WAN 52

WAN IP Address MPLS Financial 52

Kentik

DECEMBER 5, 2016

In this case we chose the “Destination:IP/CIDR” dimension to frame the overall view in terms of the IPs that were the destination of the problematic traffic. Next we set Metric (still in the Query pane) to look at the percentage of TCP retransmits. The next step toward finding out was to add “Full:Device” as another group-by dimension.

Networking 40

Networking Network TCP IP Address 40

Confluent

FEBRUARY 21, 2019

For example, if DHCP logs are being collected, you can have a table that keeps the most up-to-date mapping between an IP address and a domain computer in your environment. Meanwhile, you can query the DHCP logs stream and access past IP addresses assigned to workstations in your network. What is the Sysmon data model?

IP Address 83

IP Address Server Application Network 83

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. Catos IPS uses metadata from network traffic flows and third-party data feeds in conjunction with machine learning algorithms to detect suspicious network activity.

Network Security 52

Network Security Networking Network UDP port 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. Faster containment of threats Once a live threat is verified, automatic containment actions such as disconnecting affected endpoints and blocking malicious domains or IP addresses.

Network Security 52

Network Security Networking Network UDP port 52

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

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. First, we’ll write a query to get a list of all the hosts in the network that are receiving traffic from remote source port TCP/25 (the traffic described in Step 2 above).

TCP 40

TCP Protocol Port IP Address 40

Kentik

JUNE 6, 2023

To expose Docker’s API to the world , use: sudo dockerd -H unix:///var/run/docker.sock -H tcp://0.0.0.0:2375 2375 Connect to your server at its IP address over port 2375. Add the hostname or IP address of your API here. That means whitelisting the following: IP addresses: 208.76.14.0/24

IP Address 52

IP Address Server TCP Port 52

CATO Networks

APRIL 26, 2016

IP Routings Historical Baggage: Simplistic Data Plane Whether the traffic is voice, video, HTTP, or email, the Internet is made of IP packets. If they are lost along the way, it is the responsibility of higher-level protocols such as TCP to recover them.

Internet 52

Internet Routers MPLS Protocol 52

CATO Networks

JUNE 7, 2020

Next, each Cato PoP acts as TCP proxy to maximize the transmission rate of clients, increasing total throughput dramatically. Direct routing to the destination is often the right choice, but in some cases traversing an intermediary PoP or two is the more expedient route. This allows for maximum efficiency of packet processing.

SASE 52

SASE Internet Application Networking 52

CATO Networks

JULY 7, 2022

Advanced TCP congestion control enables Cato edges to send and receive more data, as well as better utilize available bandwidth. Accelerating bandwidth intensive operations like file upload and download through TCP window manipulation. The external IP addresses of the PoPs are protected with specific anti-DDoS measures.

SASE 52

SASE MPLS WAN Internet 52

Kentik

FEBRUARY 8, 2016

A border router is a router that is configured to peer with a router in a different AS, meaning that it creates a TCP session on port 179 and maintains the connection by sending a keep-alive message every 60 seconds. One or multiple border routers. The advertising of routes helps a network operator do two very important things.

Advertising 49

Advertising Routers Internet Protocol 49

Kentik

OCTOBER 2, 2015

Define a TCP Syn alert based on the queries provided in Defining an Alert below. For instance, if an attack targets a single destination IP address, but multiple destination ports, each destination port will be listed in a separate array, where Array ([ X ] becomes the next number.

Port 40

Port Protocol Server Bandwidth 40

Kentik

DECEMBER 18, 2018

You’ll also notice that every other row alternates to show these critical boundary points by both bits-per-second and also the ever-useful GCP latency metric, which combines application and network latency for every TCP flow. This gives the user quick insight into which parts of the world are being served by their GCP infrastructure.

Cloud 45

Cloud Networking Network Port 45

Kentik

JULY 11, 2017

The library includes templates for alerting on DDoS attacks, changes in top talker IP addresses, changes in geography, interfaces approaching capacity, devices that stop sending flow, and much more. Kentik is continually adding to the library as we add new features and uncover new use cases.

Email 40

Email Networking Network IP Address 40