NW Kings

JANUARY 7, 2025

In this blog, we will explore what static routes are, how they differ from dynamic routes, and how to configure them on routers like Cisco devices. This characteristic makes them efficient for routers with limited processing capabilities. What is a Static Route? A static route is a manually configured path in a routing table.

Routers 52

Routers IP Address Protocol Topology 52

Network Engineering

DECEMBER 11, 2023

We have a block of static IPs facing the public, and have to have a router which points all the traffic to our router/gateway which points all the traffic to the ISP. Right now, all traffic has a static rule to send all traffic to the ISP gateway on the router at the edge going to the hand off. port=0, tag=any dst ip/id=0.0.0.0,

VPN 52

VPN Port Protocol WAN 52

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

SEPTEMBER 11, 2018

a sequence of related packets) as they traverse routers, switches, load balancers, ADCs, network visibility switches, and other devices. Network elements that support traffic monitoring protocols such as NetFlow and sFlow extract critical details from packet flows, like source, destination, byte and packet counts, and other attributes.

Protocol 66

Protocol Ethernet Network Networking 66

Kentik

JANUARY 13, 2021

Send these pings using the Internet Control Message Protocol (ICMP) or TCP to one or any of the devices you believe to be involved. Ping is a utility that’s available on practically every system, be it a desktop, server, router, or switch. There’s a sports analogy that says “the most important ability is availability” for systems.

Network 114

Network Networking TCP Protocol 114

Kentik

FEBRUARY 8, 2016

Designed before the dawn of the commercial Internet, the Border Gateway Protocol (BGP) is a policy-based routing protocol that has long been an established part of the Internet infrastructure. An internal routing scheme so that every router in a given AS knows how to get to every other router and destination within the same AS.

Advertising 49

Advertising Routers Internet Protocol 49

Kentik

MARCH 13, 2019

A common DDoS mitigation technique is Remotely-Triggered Black Hole (RTBH), which requires extensive pre-configuration of discard routes and/or uRPF on all edge routers. IP Protocol. Destination port. Source port. It’s now much easier to propagate filters to all edge routers in large networks. Destination Prefix.

IP Address 49

IP Address Port Routers DNS 49

Kentik

JANUARY 29, 2020

This includes port, IP source, destination, port numbers, and other markings such as quality of service (QoS). SNMP is the oldest of the network management protocols in use today. Flow technologies, such as NetFlow, sFlow, jFlow, IPFIX, and others, are used to describe traffic on the network. When is SNMP Used?

Port 16

Port Network Networking Data Centers 16

CATO Networks

JANUARY 17, 2018

In some cases, network scanners will use port scans and in other cases ping sweeps. The University of Pennsylvania, for example, uses network scanning in the study of global trends in protocol security. This can be easily done by configuring Remote Port Forwarding in the Cato management console. What is Network Scanning?

Network 52

Network Networking Server Port 52

Kentik

JANUARY 29, 2020

This includes port, IP source, destination, port numbers, and other markings such as quality of service (QoS). SNMP is the oldest of the network management protocols in use today. Flow technologies, such as NetFlow, sFlow, jFlow, IPFIX, and others, are used to describe traffic on the network. When is SNMP Used?

Port 78

Port Network Networking Data Centers 78

Kentik

MARCH 19, 2020

This configuration is known as a “split-tunnel” configuration and is set up by rules to exclude specific ports, protocols, or networks. If the VPN gateways cannot generate flow or Syslog with traffic, the next richest data comes from the edge routers or switches near the VPN devices.

VPN 69

VPN Network Networking Gateway 69

Kentik

JANUARY 11, 2016

First we’ll look at what protocol the traffic consists of. So next, to shed further light on the nature of the DDoS attack, we want to know the port that this UDP traffic is aimed at. To see that, we go back to the Metrics menu and choose Destination » Port. We can do this in multiple ways. Conclusion.

Port 40

Port Network Networking UDP port 40

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.

Protocol 40

Protocol Routers Encryption IP Address 40

Kentik

MARCH 28, 2016

How flow protocols adapt as network needs evolve. But while NetFlow and its variants like IPFIX and sFlow are similar overall, beneath the surface there are significant differences in the way the protocols are structured, how they operate, and the types of information they can provide. More of a good thing.

Protocol 40

Protocol Routers MPLS IP Address 40

Network Engineering

NOVEMBER 24, 2022

{master} nms@MX960> request routing-engine login other-routing-engine connect to address 128.0.0.4: Operation timed out Trying 10.0.0.4. re0: Operation timed out connect to address 128.0.0.4: Operation timed out Trying 10.0.0.4. Load averages: 1 minute 5 minute 15 minute 0.02 Load averages: 1 minute 5 minute 15 minute 0.02

Engineering 52

Engineering Routers Port MPLS 52

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. Juniper MX and PTX series routers (via IPFIX). Alcatel-Lucent routers. Huawei routers. Cisco Catalyst switches. Enterasys switches. Flowmon probes. Linux devices.

Routers 40

Routers IP Address Protocol Server 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.

Protocol 40

Protocol Routers Bandwidth Internet 40

Kentik

APRIL 3, 2023

For example, to determine latency using traffic generated from probes or by analyzing packets, that traffic would likely pass through routers, firewalls, security appliances, load balancers, etc. Second, in a busy network, devices such as routers, switches, and firewalls may be very busy operating at a relatively high CPU.

TCP 110

TCP Application Virtual machine Network 110

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). AND protocol = 6.

TCP 40

TCP Protocol Port IP Address 40

Kentik

MARCH 6, 2019

In the Kubernetes networking model, in order to reduce complexity and make app porting seamless, a few rules are enforced as fundamental requirements : Containers can communicate with all other containers without NAT. Sometimes, 1 & 2 are grouped as “pod networking” and 3 & 4 as “service networking.”. L2 networks and Linux bridging.

Network 63

Network Networking Application Cloud 63

Kentik

SEPTEMBER 20, 2016

TCP was designed as a stateful protocol to provide reliability across network infrastructure. Specifically TCP, which is used in over 90% of network transactions. The Transport layer is important because TCP visibility can give you reliable, detailed insight into network performance.

Network 40

Network Networking TCP Server 40

Kentik

JULY 28, 2021

Latency : Missing packets in connection-oriented protocols such as TCP and QUIC result in lost packets getting resent. Bad hardware (the switch or router port). Overwhelmed router. Congestion in the form of high-connection utilization or an overworked router in the path is another common source of trouble.

Cloud 116

Cloud TCP Routers Protocol 116

Kentik

DECEMBER 18, 2017

So it’s interesting to see that Juniper Networks, at 49.6%, is the leading maker of routers and switches sending flow to 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