Network Engineering

JANUARY 31, 2025

The Problems (1) I have two routers, a Zyxel C3000Z (Centurylink) and a Netgear Genie WNDR3400v2. 251,222,250 for my PC ,TrueNas Server and Netgear Router respectively. 1 I setup the TrueNas (A Dell Studio 540 with a 1000BaseT Network capability) and connected it to the Netgear Router. Default Gateway is 192.168.0.1.

Routers 130

Routers Internet Server Wireless 130

Network Engineering

SEPTEMBER 12, 2023

Starting from the following network topology: Internet ISP Cable Router Firewall Router rest of the network / multiple VLANs (port forwarding) | DMZ I had to expose two VLANs over the internet through VPN for two groups of users. what is the recommended way of achieving what I want to do?

VPN 130

VPN Server Routers Port 130

Network Engineering

JANUARY 1, 2025

Objectives Install FreeRADIUS on CentOS(steam 9) to perform Cisco device authentication Perform dot1x authentication on all ports of the switch Perform authentication by connecting a laptop to the switch CentOS(203.230.7.2) - Cisco 2960 Switch(203.230.7.254) - Cisco 2800 Series Router(gig0/0 : 203.230.7.1, 255.255.255.0

Port 130

Port Routers Firewall Server 130

Network Engineering

FEBRUARY 12, 2025

I have a zone-based firewall configuration with WAN, LAN, and LOCAL zones (LOCAL being the zone for the router itself). I have the following interfaces on my router: eth0 - DHCP address served by Vigor 130 modem (192.168.2.0/24) My WAN connection is via a PPPoE modem (a DrayTek Vigor 130). It has a static IP of 192.168.2.1/24

LAN 130

LAN WAN Firewall Port 130

Kentik

JANUARY 6, 2021

In part 1 of this series , I talked about the importance of network observability as our customers define it — using advances in data platforms and machine learning to supply answers to critical questions and enable teams to take critical action to keep application traffic flowing. Access and transit networks, edge and exchange points, CDNs.

Network 128

Network Networking Gateway Access Point 128

DCNN Magazine

JANUARY 8, 2025

Juniper Networks , a provider of secure, AI-native networking, has today announced a landmark project with the Netherlands Institute for Radio Astronomy, ASTRON, to upgrade its core, access, WLAN and WAN network infrastructure, supporting the development of its LOFAR 2.0 (Low Low Frequency Array) upgraded telescope.

Network 130

Network Networking Bandwidth Routers 130

Network Engineering

DECEMBER 7, 2022

For reasons that are not important, we have a customer that wants to ensure that it can not work on an actual IP network and only direct. But, when I connect them through our corporate network, through multiple switches, managed and unmanaged (and possibly a router, I didn't check with IT), they still link together and function normally.

IP Address 130

IP Address Network Networking Routers 130

Network Engineering

OCTOBER 7, 2015

We have a Cisco 3825 router with an IPSec Remote Access VPN configured to authenticate against a radius server. We changed the radius-server host line in our config accordingly and the router is able to communicate with the new radius server. We're retiring the old server and moving to a new one (Windows Server 2012).

VPN 130

VPN Port Routers Server 130

Network Engineering

APRIL 7, 2022

When I connect a device to port 3 or 5, regardless if I have the port set to auto or I assign a static IP, I can not get anything to connect to the VLAN1 or VLAN2 (I am doing all this with the managed led on) I am sure I missing something simple. Anyone see what I am doing wrong? Thank You.

Port 130

Port IP Address Routers 130

Packet Pushers

AUGUST 21, 2020

Today's Heavy Networking dives into sponsor Arrcus's Virtualized Distributed Router, new software that transforms the monolithic chassis that can scale to thousands of ports while being operated and managed like a single device. Our guests are Murali Gandluru, Keyur Patel, and Nalin Pai from Arrcus.

Routers 52

Routers Port Network Networking 52

Kentik

FEBRUARY 8, 2023

Traffic telemetry is the data collected from network devices and used for analysis. As a critical input to a network observability platform, this data can help monitor and optimize network performance, troubleshoot issues, and detect security threats. Monitoring network traffic can be expensive.

Network 111

Network Networking Port IP Address 111

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. network subnet 10.113.0.0

VPN 130

VPN Port Protocol WAN 130

Kentik

SEPTEMBER 22, 2021

Last Tuesday, September 14th was the second Tuesday of the month, and for anyone running a network or working in IT, you know what that means: another Microsoft Patch Tuesday. Learn more about the application of Kentik for network business analytics here. The capability is more than simple NetFlow analysis. Microsoft Patch Tuesday.

DNS 145

DNS Port Routers Network 145

CloudFaire

JANUARY 3, 2025

As a result, Internet devices usually use a single path and let the routers handle the path selection. Aggregation : MPTCP can aggregate the bandwidth of many network interfaces. Mobility : On a customer device, a TCP stream is typically broken if the underlying network interface goes away. There is another way.

TCP 144

TCP Port Server Advertising 144

Network Engineering

FEBRUARY 2, 2024

However, I'm encountering difficulties at the step where I need to configure a routed port or a static route. set system mode router ! Despite attempting these configurations, I'm unable to achieve successful communication between the different VLANs. no ip address dhcp !

IP Address 130

IP Address Port Routers 130

Juniper

FEBRUARY 24, 2025

Official Juniper Networks Blogs Enhanced AI-Native routing for private and service provider WAN: the cornerstone of autonomous networking Junipers latest AI-Native routing solution is the culmination of decades of industry leadership and innovation. Our networking roots run deep. Want to reduce power bills by up to 70%?

WAN 76

WAN Network Networking Routers 76

Kentik

JANUARY 13, 2021

The Network is the Key. The network is down!” — I’m sure you heard that before. Despite your best efforts as a network engineer, network failures happen, and you have to fix them. Network troubleshooting becomes easier if your network is observable. Network Troubleshooting Defined.

Network 114

Network Networking TCP Protocol 114

Kentik

FEBRUARY 3, 2022

A peering coordinator is the person responsible for the way an IP network connects to the rest of the internet. Peering” is the term used for interconnections between two IP networks where the two networks provide access to each other’s networks and customers but do not allow traffic to transit to the rest of the internet.

Port 105

Port 5G Routers Internet 105

Kentik

JANUARY 24, 2022

Back in the 1990s, NetFlow was introduced on Cisco routers as a means to collect information about IP network traffic as it enters or exits an interface. Since then, network flows have been one of the best ways to gain insight into traffic. Source port for UDP or TCP, 0 for other protocols. Don’t rely on ports.

Application 96

Application IP Address DNS Port 96

Packet Pushers

MARCH 8, 2024

Today we metaphorically pop open the hood of switches and routers, taking a look at the mechanics of how they work. We also cover line rate, port-to-port latency, and buffers. Read more » Today we metaphorically pop open the hood of switches and routers, taking a look at the mechanics of how they work.

Port 52

Port MPLS Routers Network 52

Juniper

DECEMBER 19, 2024

Official Juniper Networks Blogs The year in review: Delivering simplicity, productivity, reliability, and security with AI-Native Networking The past year at Juniper has been exciting to say the least. Junipers AIOps simplifies network management, empowering IT teams to shift from reactive to proactive management.

Network 83

Network Networking Wide Area Network Data Centers 83

Kentik

MAY 21, 2019

The Mirai botnet was first discovered back in 2016, but has continued to persist and abuse common vulnerabilities and exposures (CVEs) on IoT devices, including home routers and many other network-connected devices. These addresses were apparently port scanning IP addresses that belonged to the company sending the letter.

Port 81

Port IP Address Internet Network 81

Kentik

NOVEMBER 17, 2021

Whether it is a Call of Duty update or a Microsoft Patch Tuesday , these OTT traffic events can put a lot of load on a network and understanding them is necessary to keep a network operating at an optimal level. Learn more about the application of Kentik for network business analytics here. The spice (and traffic) must flow.

DNS 99

DNS Port Routers Network 99

Kentik

JUNE 7, 2023

Enterprises migrate to multi-cloud networks not because they want to, but because they have to. Two exciting new capabilities help you quickly answer any question about your multi-cloud network: Kentik Cloud users can now collect, analyze, and visualize flow logs generated on AWS Transit Gateways. There’s an acquisition.

Cloud 97

Cloud Gateway Port IP Address 97

Kentik

NOVEMBER 7, 2021

But, we also learned something else: When there is a network problem, we have to figure it out ourselves, which is less awesome. Leading up to SaaS offerings, everything we communicated with over the network to do our jobs (other than surf the web and send email) was hosted on-premises. I mean, no one sees me from the waist down.”.

Routers 104

Routers Internet Application Server 104

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. But then, it is up again, but from RE1, I still couldn't show any command invoke-on backup RE (RE0).

Engineering 130

Engineering Routers MPLS Port 130

Kentik

MARCH 19, 2020

When more of the workforce shifts to working remotely, it puts new and different strains on the infrastructure across different parts of the network, especially where VPN gateways connect to the network edge. Kentik provides an easy way to see not only the entire network but also how it’s being used.

VPN 69

VPN Network Networking Gateway 69

Kentik

MARCH 6, 2019

Understanding the network footprint of applications and services is now essential for delivering fast and reliable services in cloud-native environments. Networking is not evaporating into the cloud but instead has become a critical component that underpins every part of modern application architecture. A Refresh: Kubernetes Basics.

Network 63

Network Networking Application Cloud 63

CATO Networks

JANUARY 17, 2018

In the light of recent ransomware attack campaigns against Microsoft RDP servers, Cato Research assessed the risk network scanning poses to organizations. What is Network Scanning? Network scanning is a process for identifying active hosts on a network. Whats Services Are Normally Targeted By Network Scanning?

Network 52

Network Networking Server Port 52

Kentik

APRIL 3, 2023

Those calls could be for kernel services, network services, accessing the file system, and so on. Therefore, by looking at the interactions between the application and the kernel, we can learn almost everything we want to know about application performance, including local network activity. How does eBPF work?

TCP 110

TCP Application Virtual machine Network 110

Kentik

JANUARY 29, 2020

There is a lot of confusion regarding the two primary data sets in network management: SNMP and flow. SNMP is used to collect metadata and metrics about a network device. This critical technology is a basic building block of modeling, measuring, and understanding the network. What is SNMP? When is SNMP Used?

Port 16

Port Network Networking Data Centers 16

Kentik

JANUARY 29, 2020

There is a lot of confusion regarding the two primary data sets in network management: SNMP and flow. SNMP is used to collect metadata and metrics about a network device. This critical technology is a basic building block of modeling, measuring, and understanding the network. What is SNMP? When is SNMP Used?

Port 78

Port Network Networking Data Centers 78

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 Configure address translation using PAT and network objects NDNA-ASA(config)# object network INSIDE-NET NDNA-ASA(config-network-object)# subnet 10.10.10.0 NDNA-ASA(config)# dhcpd option 3 ip 10.10.10.1

Firewall 52

Firewall IP Address VPN Port 52

The Network DNA

NOVEMBER 26, 2024

Cisco ASA Firewall in a Network What is Cisco ASA Firewall? Cisco ASA is a security device that includes a firewall, antivirus, intrusion prevention, and a virtual private network (VPN). It enables proactive threat defense, preventing assaults from spreading throughout the network. How to check the show version command ?

Firewall 52

Firewall VPN IP Address Port 52

NW Kings

JANUARY 7, 2025

Static routes are fundamental components in networking that help direct traffic efficiently from one network segment to another. 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. What is the role of static routes in networking?

Routers 52

Routers IP Address Protocol Topology 52

Kentik

JANUARY 11, 2016

In our recent blog post DDoS Detection: Source Geography NetFlow Analysis we looked at how you can actively explore network traffic with Kentik Detect and discover attacks that you might not otherwise realize are happening. To see that, we go back to the Metrics menu and choose Destination » Port. Conclusion.

Port 40

Port Network Networking UDP port 40

Kentik

MARCH 13, 2019

With many attacks stemming from totally unpredictable events like political dissent, employee misconduct, or actions of third parties, every type of organization needs to be prepared to mitigate DDoS attacks and proactively defend their networks to ensure business continuity. Destination port. Source port. Destination Prefix.

IP Address 49

IP Address Port Routers DNS 49