Articles about networking | UserComp.com

ARP Packets Dropped in Linux Bridge: Troubleshooting a Network Issue

In this tech support article, we will discuss a common issue where ARP packets are dropped in a Linux bridge network setup. This problem can lead to connectivity issues between hosts. We'll provide suggestions to troubleshoot and resolve this issue.

Could Linux Hold IP Cameras in the Future?

Exploring the possibility of using Linux for managing and setting up IP cameras in a private network.

Automatically Enabling/Disabling Network Connections: Ethernet and Wi-Fi Adapters

When you plug in a network cable into an Ethernet port or unplug it from a Wi-Fi adapter, the respective adapter gets automatically enabled or disabled. This behavior might not always be desired. In this article, we'll discuss how to manage network adapter settings manually on Windows, Linux, and MacOS.

Achieving TCP Communication Across Network Segments: IP Addresses 192.168.0.2 and 192.168.12.2

This article discusses the steps to achieve TCP communication between two hosts, each with unique IP addresses and subnet masks, located in different network segments.

Switching Active Network Connections Based on Active Windows User: A Guide

Learn how to utilize different LANs based on the active Windows user by setting up network switching on the physical level. This guide covers the necessary steps to accomplish this task using vLANs.

Troubleshooting: Pinging Self via Gateway - Connection Issue

Experiencing issues while pinging yourself via a gateway? Learn potential solutions to bypass routing mechanisms when your kernel fails to send packets outside the world.

Troubleshooting Wrong Dual Router Topology: ISP-Provided Modem Limiting Functionality

Learn how to identify and resolve issues caused by wrong dual router topology, specifically when dealing with ISP-provided cable modems that limit functionality.

Understanding the Purpose of TEST-NET-1, TEST-NET-2, and TEST-NET-3 in Networking

In networking, the TEST-NET-1, TEST-NET-2, and TEST-NET-3 blocks are reserved for specific purposes. This article explains their significance, referring to RFC 5737 for more details.

Windows 10: Querying DNS Servers upon NXDOMAIN response - Preferred one?

When querying DNS servers in Windows 10, which server is preferred when receiving an NXDOMAIN response from both DNS1 (example1.com) and DNS2 (example2.com)?

Forwarding Ports for Applications using WireGuard: A Comprehensive Guide

Learn how to forward ports for applications using WireGuard VPN on your desktop and smartphone devices. This comprehensive guide covers the basics of WireGuard and provides step-by-step instructions for setting up port forwarding.

Alternative ARP Discovering Devices for Networks: APARP-A Replacement on Linux

Learn about alternative ARP discovering devices and tools for networks on Linux, including APARP-A replacement. Install required packages and discover network devices using ARP commands.

Communicating Across Network Segments: Find B's IP Address

Two hosts, A and B, are connected via a router using Ethernet. The IP address of host A is 192.168.3.100, but the IP address of host B is unknown. In order to communicate between the hosts, you need to find B's IP address. This article provides steps to identify the IP address of host B.

Port Forwarding MacOS with VMWare Service: Private IP Addresses

Learn how to set up port forwarding on a MacOS system running VMWare Fusion with a private IP address for a VM's service.

Configuring WANEM with Two VM Hosts: IP Addresses and Subnets

Learn how to configure WANEM emulator with two VM hosts, setting up IP addresses and subnets for optimal network performance.

Finding IP Addresses of Devices Connected to Two Switches

Learn how to find the IP addresses of devices connected to two switches, such as a laptop and IP cameras. This guide covers setting static IPs on switches and accessing connected devices.

Fritzbox Not Answering Ping: Machines on Subnet with OpenVPN Connection

Users report that their Fritzbox router is not responding to pings from machines on the subnet when an OpenVPN connection is in use. This article provides suggested solutions for troubleshooting and resolving the issue.

Troubleshooting WireGuard on Ubuntu Server with Docker Containers

This article explains how to troubleshoot WireGuard on an Ubuntu server running Docker containers, focusing on a specific IP address (192.168.1.208) and WireGuard port (51820).

Understanding Windows 10: IPv4 Configuration Per-Adapter Basis

Learn about the IPv4 configuration settings in Windows 10 that are applied on a per-adapter basis and how to switch between home network and hotspot manually.

Understanding Primary, Secondary, and Tertiary Networks with Different Subnet Masks

Learn how to configure and manage primary, secondary, and tertiary networks with different subnet masks. This article explains the concept of subnetting and provides steps for setting up your home network with a WAN router.

Isolating Outward-Facing Server VM from Internal Virtual Machine Cluster

Learn how to isolate an outward-facing server VM from an internal virtual machine cluster using a layer 2/3 network switch for improved security.

Accessing Another Server: VServer on routetrafficabc.com

Learn how to access a VServer on routetrafficabc.com using simple Debian VMs and normal internet connections. Understand the process behind VServers and tunneling.

Routing Traffic between Three WireGuard Nodes: Main-Server, Web-Gateway, and Client

Learn how to route traffic between a Main-Server, Web-Gateway, and Client using WireGuard. Discover the steps to configure connections for secure and efficient communication.

Achieving Full Cone NAT Connectivity inside K8s Pods: A Deep Dive

Learn how to configure Full Cone NAT connectivity for applications running inside Kubernetes pods. Discover the differences in implementation and explore the use of kubectl run natdisco.

Setting Proper Internal DNS Servers for a Homelab Network

This article provides instructions on how to set up proper internal DNS servers for a homelab network with three bind9 servers acting as authoritative and recursive DNS servers.

Successful Boot of Arista Switches with Programmed Bounce Ports in Power Outage Restoration

In the event of a power outage that results in a large number of offline devices, it is believed that the cause of some devices failing to boot may be an Arista switch with the slowest devices booting. This issue can be resolved by programming bounce ports.

CGNAT and Direct Connections: A Workaround with VPC for IPv4 Addresses

When your internet provider uses Carrier Grade Network Address Translation (CGNAT), direct connections via IPv4 addresses become impossible. In this article, we discuss a workaround using a Virtual Private Cloud (VPC) to enable IPv4 connections.

Connecting IaaS DBs to AKS in Enterprise Scenarios on Azure

Learn how to connect IaaS databases to Azure Kubernetes Service (AKS) in enterprise scenarios with fragmented AKS, VM, and Backup subscription setups.

Connecting Database VMs and AKS Workloads: Azure Networking Options for IaaS DB Solutions

Learn how to connect Database VMs and AKS workloads in an IaaS DB solution on Azure. Explore various networking options for optimized performance and security.

Making Home Server Accessible to Internet: Unsuccessful Attempts

This article discusses the unsuccessful attempts to make a home server accessible to the internet despite configuring SSH, enabling firewall rules, and other necessary steps.

Responding to BOOTP requests using TFTP daemon in Fedora

This article explains how to configure the TFTP daemon in Fedora to respond to BOOTP requests.

Unable to Connect Internet in Kali Linux 2024.2: Network Probably not using DHCP protocol

This article provides a solution to an issue where Kali Linux 2024.2 installed as a Virtual Machine using Oracle VM VirtualBox fails to connect to the internet with an error message 'Network probably not using DHCP protocol'.

Understanding the Effectiveness of 'networkingMode=mirrored' in Win11 WSL2

This article explains the functionality and effectiveness of the 'networkingMode=mirrored' setting in WSL2 (Windows Subsystem for Linux 2) for Windows 11.

Setting up Multiple Netcat Connections in Old CentOS Offline LAN

Learn how to set up multiple Netcat connections in an old version of CentOS offline LAN network. Follow this step-by-step guide to configure hosts like nc <ip1> 5555.

10GigE Network Card Won't Come Up Unless 2.5Gig Card is Connected: Zimax Cube-N100 NAS Solution

Users of the Zimax Cube-N100 NAS system have reported an issue where the 10GigE network card fails to come up unless the 2.5Gig card is connected. This article provides a possible solution to this problem.

Setting up Reverse Proxy across Multiple Devices on Local Network

Learn how to set up a reverse proxy across multiple devices on a local network, including Raspberry Pi and other devices.

IPTables NAT Configuration: Laptop to OrangePi1 to OrangePi2

This article explains how to configure IPTables for Network Address Translation (NAT) to enable communication between a laptop and two OrangePi devices.

WSL Ubuntu on Wi-Fi Hotspot: Unable to Access Local Network from Windows Side

This article provides a solution for users who are unable to access their local network from the Windows side when running a Ubuntu instance as a WSL on a Wi-Fi hotspot.

Configuring Development Environment: Not Reach WebServer on VMs using DNS, iptables rules, forward packets, virtual bridge

In this tech support article, we will guide you through the process of configuring your development environment to reach the webserver on VMs using DNS, iptables rules, forward packets, and virtual bridge. Follow the simplified description below for a top-down understanding of the setup.

Understanding the Difference: Ethernet vs. Type-Ether

In the realm of computer networking, Ethernet and Type-Ether are often used interchangeably, but they have distinct differences that can impact performance. Let's explore the nuances of each.

Windows: Setting up a Game Server - Join via Local IP, not External

Learn how to set up a game server on Windows and join it using a local IP address instead of a public IP.

Troubleshooting 1000Mbps NICs Limited to 40Mbps: A Common Issue with VPNs

Experiencing slow network speeds despite having a 1000Mbps NIC? Learn how to troubleshoot and resolve the issue with VPNs.

Troubleshooting Packet Loss: Analyzing a .pcap File

Learn how to analyze a .pcap file to identify the cause of packet loss in your network. This article provides a step-by-step guide for troubleshooting packet loss issues using Wireshark and other tools.

Port Forwarding with Unmanaged Switch in New House Network

Learn how to set up port forwarding on an unmanaged switch in a new house network. Replace Ethernet cables running from room to room with Wi-Fi in the garage.

Reach Network Devices Via WiFi or Ethernet: A Comprehensive Guide

Learn how to reach network devices using both WiFi and Ethernet connections. This comprehensive guide covers various devices such as Win10 laptops, Fritzbox6590, Cablerouter, SynologyDS218j, and TP-Link powerline adapters.

Troubleshooting Static Route Issues in Windows

Learn how to diagnose and resolve static route issues in Windows operating systems. This article covers common causes and solutions.

Getting IPv4 Address for Metasploit 2 in VMware: A Step-by-Step Guide

Learn how to get the IPv4 address for Metasploit 2 in VMware when the network Bridge Adapter shows IPv6 for eth0.

Configuring a WIFI-Connected Printer with VM NAT Connection on Windows 10 and Linux Hosts

Learn how to configure a WIFI-connected printer on a Windows 10 VM with a NAT connection to a Linux host running Debian Bookworm and Qemu with Virt-Manager.

IP Address Suddenly Unreachable: Troubleshooting Connection Timeouts

Learn how to diagnose and resolve connection timeouts when trying to reach an IP address on a small website. This article provides steps for IPv4 addresses on Linux, Windows, and MacOS systems.

Router Knows Packets in VM Bridged Mode: Reach VM First?

Understanding whether a router knows packets in VM Bridged Mode and if reaching the VM first is necessary. VirtualBox local network ARP settings and the need for promiscuous mode.

Understanding TCP Streams: Two Separate Modules for Command Machines

This tech support article explains the concept of TCP streams and how they function in the context of command machines. It covers the two separate TCP modules involved: one that receives commands and another that sends data based on those commands. This article is intended for users with a basic understanding of networking and will provide a brief overview of TCP streams and their importance in managing command machines.

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