Articles about networking | UserComp.com

Routing Traffic from/to Webapp eth0 Instead of tun0 (VPN) in Debian

Learn how to route traffic for a web application over eth0 instead of the default tun0 interface in Debian, bypassing VPN connections.

Trying to Change MTU: netsh int ipv4 set subinterface "WiFi" mtu=1500 store=persistent

This article provides a solution to an error encountered while trying to change the Maximum Transmission Unit (MTU) of a WiFi interface using the netsh int ipv4 set subinterface command with persistent store in Windows.

How to Change MTU Value to 1500 for WiFi Interface in netsh int IPv4

Learn how to change the MTU value to 1500 for a WiFi interface using netsh int IPv4 command in Windows.

Automatically Adding PPPoE Account on ZTE OLTc610 Terminal: A Beginner's Guide

Learn how to automatically add a PPPoE account on the ZTE OLTc610 terminal, even though the configuration menu suggests manual addition. This beginner-friendly guide covers the basics of Gpon networks.

Setting up 3DCs on the Same VLAN: Domain Controller Access Issues with Full Control on DC3

In this tech support article, we will guide you through setting up a Three-Domain Controller (3DC) environment on the same VLAN network. We'll discuss the issue of company data being added with full control on DC3, which causes access problems.

Ncat Inside WSL2 on Windows 11: Mirrored Networking Mode Configuration

This article provides a step-by-step guide on how to configure Ncat inside WSL2 on Windows 11 to use mirrored networking mode. Normally, a Ncat server starts listening on 127.0.0.1...

Setting Up Multiple Upstream Routers: A Comprehensive Guide

Learn how to correctly set up multiple upstream routers in your network topology, including a modem, OPNSense Router, L2 Managed Network Switch, various LAN clients, and another TP-Link Router.

How to Bind WireGuard Network Interface via IP Address instead of Interface Name in Linux

Learn how to bind WireGuard network interface via IP address instead of interface name in Linux for specific applications that require it.

Mapping IPv6 Addresses to Docker Containers: A Step-by-Step Guide

Learn how to assign and map IPv6 addresses to Docker containers for seamless communication between containers and the host network.

Inbound Connection Route 0.0.0.0: Server Original URL Display Issue

Users reported seeing a 404 error instead of the original URL when an inbound connection was made to the server with IP address 0.0.0.0. Instead, the server displayed a different IP address (0.0.0.0). This article explains possible causes and solutions for this issue.

Accessing Office Network Server with Public IP: A Case Study

In this tech support article, we explore a case where a user tries to access a server on an office network using a public IP address. We provide a step-by-step guide on how to handle this situation.

Understanding Packet Forwarding vs Local Delivery in Network Routing

When a packet is received by the Linux kernel, it goes through the pre-routing chain. The routing decision is made whether to forward the packet somewhere else or deliver it locally. In this article, we'll discuss the difference between packet forwarding and local delivery in network routing.

Switching from Bridge Networking to Setup Software: A Ubuntu 22.04 LTS Guide

Learn how to switch from bridge networking to setting up software on Ubuntu 22.04 LTS for your DIY router. This step-by-step guide covers installing firewalld and configuring different ports for Mxd.

ARP Requests Causing Network Disconnections: A Common Issue with Internet Service Providers

Learn about ARP requests and how they can cause network disconnections, especially with Internet Service Providers like Virgin Media. Find solutions to this common issue.

Possible Connection: Router 1 to Router 2 - Internet vs Intranet Access Time?

Two routers are in place, one for internet access and the other for intranet. Is it possible for Router 1 to access Router 2's intranet with a reliable connection and efficient access time? Let's explore the possibilities.

Several Workstations Periodically Lose Internet Connectivity

Several workstations, wired and wireless, on different networks and subnets, running Windows 10, lose internet connectivity periodically. The issue may last for hours.

Several Workstations Lose Internet Connectivity Periodically: Troubleshooting Steps

Several workstations, both wired and wireless, running different operating systems and network subnets, experience periodic internet connectivity loss. This issue may last for hours. Let's explore potential causes and solutions.

Programmatically Updating EdgeOS Configurations with Python and Fabric

Learn how to use Python and Fabric to programmatically update EdgeOS configurations. This article explains the setup and provides examples.

Using Shuttle VPN for Redirect Traffic between Two Connected Computers

Learn how to use Shuttle VPN to redirect traffic between two connected computers, such as a laptop and a desktop.

Direct Connect via Ethernet: Two Windows 10 Machines Keep Connection via WiFi

Two Windows 10 laptops connected to a router via WiFi can access the internet in Explorer and share files successfully. However, one machine's ping response is not consistent. Learn how to set up a direct Ethernet connection between the two machines for a stable connection.

Troubleshooting Ping in Windows Machine Network without Router or Server

Learn how to ping Windows machines in a network without a router or server. This article provides a step-by-step guide to help you diagnose infrastructure issues in office environments.

Understanding Proxy ARP Alarms from Your ISP: A Tech Support Guide

If you're experiencing alarms from your ISP that follow a hourly pattern, you may be dealing with Proxy ARP. In this article, we'll help you understand what Proxy ARP is and how to resolve the issue.

Switch Hopping vs Router Switch: A Comparison for Networking

When configuring a network with multiple switches and routers, understanding the differences between switch hopping and router switching is essential. In this article, we'll discuss the pros and cons of each approach when connecting Router LAN to Switch A, Switch A to Switch B.

DNS Server: Resolving Internal Domain Names to No Hosts

Learn how to troubleshoot DNS servers that fail to resolve internal domain names, resulting in 'no hosts' errors. Follow the steps below to resolve this issue using the nslookup command.

Static IP Configuration Issue on Debian Bookworm Server

The user recently started hosting a server on Debian Bookworm. Initially, everything worked perfectly with a public IP address. However, after attempting to set up a static IP, they encountered issues. Despite following the tutorial, the loopback address is not being assigned.

Troubleshooting: Empty 'DHCPStatus' Result after Running Particular Script

A user reports that after running a specific script, the 'DHCPStatus' result is blank. In this article, we will guide you through the process of identifying and resolving the underlying issue.

How to Add VLANs to a Non-VLAN Home Network: A Step-by-Step Guide

Learn how to add VLANs to a non-VLAN home network, enabling better network segmentation and security. Follow our step-by-step guide for Linux, Windows, and MacOS.

Sending Packet: Machine-to-Machine Local Network Broadcasts with Routers

In this tech support article, we will discuss how to send packet machine-to-machine local network broadcasts using routers. Let's assume machine B's IP and MAC addresses are known. Simplify the process by learning the necessary steps.

Handling Multiple Concurrent Requests to the Same Host using TCP

In this tech support article, we will discuss how to handle multiple concurrent requests to the same host using TCP. When a web server exposes port 80 with two endpoints, one returning dataset A and the other returning dataset B, an application may send two requests simultaneously. Let's explore ways to manage these concurrent requests effectively.

Connecting Two Raspberry Pi 4s via Ethernet Ports: A Step-by-Step Guide

Learn how to connect two Raspberry Pi 4s directly via their Ethernet ports without using them as routers. Follow our simple steps for a successful connection.

Networking Audio-Video: Church's Multi-Location Setup with Ethernet Cables

A church requires setting up multiple connection booths for audio-video displays at different locations. Learn how to use Ethernet cables to establish a reliable network connection between the source and remote HDMI displays.

Setting Up a Private LAN Network within Another Network (Linux) using Open-Source Firewall Software

Learn how to set up a private LAN network within another network using open-source firewall software on Linux. In this scenario, we will use a desktop computer.

Troubleshooting ARP Requests with Addresses Outside Subnet on Linux Router

Learn how to diagnose and resolve ARP requests with addresses outside the subnet on a Linux router.

Docker (Compose) Support for Pure L1 L2 Networking in Mini Internet Project

Learn how to configure Docker (Compose) for pure L1 L2 networking in a mini internet project. Create a custom network environment with hosts, routers, DHCP, DNS, TLS, and more.

Connecting Two Devices with a Maximum Safe Distance Using One Router and Streaming IP Camera

Learn how to connect two devices with a maximum safe distance using one router and an IP camera. Understand the maximum safe distance for CAT6 Ethernet cables and ensure seamless data streaming.

ZeroTier: Unable to Ping Router after Successful Connection with Fresh Tomato Firmware

This article discusses a common issue where users are unable to ping a ZeroTier router after a successful connection with Fresh Tomato firmware.

Understanding the Dependency of DHCP on IP Protocol

DHCP (Dynamic Host Configuration Protocol) is a network protocol used to dynamically assign IP addresses to devices on a network. However, DHCP relies on the IP protocol to function properly. In this article, we will discuss the dependency of DHCP on IP protocol and its implications.

Squid Proxy: Why aren't Via-Headers showing up in X-Forwarded-For?

This article explains why Squid Proxy might not add Via-Headers to X-Forwarded-For and provides some troubleshooting steps.

Linux Local External Network Issue: Two Servers, One Database, One Host HTTP Server Connection

This article provides a solution to a common issue encountered when connecting two Linux servers, one of which acts as a database host and the other as an HTTP server, using IP addresses within a local external network.

Dedicated IP Behind CGNAT: Unexpected Monthly Fee

A user recently received an unexpected monthly fee for a Dedicated IP, which they thought would no longer be behind a Carrier-Grade NAT (CGNAT). Let's explore this scenario and discuss possible solutions.

Configuring Raspberry Pi as DHCP and DNS Server with IPv6: Ignore Advertised DNS

Learn how to configure Raspberry Pi as a DHCP and DNS server using IPv6, and how to ignore advertised DNS.

Port Forwarding VM via OpenVPN: A Comprehensive Guide

Learn how to set up port forwarding for a VM using OpenVPN. This step-by-step guide covers the process for various operating systems, ensuring secure and reliable access to your virtual machine.

Pi-hole IPv6 Setup: Reliably Distinguish Certain Clients and Group Them?

Learn how to reliably distinguish and group certain clients in Pi-hole IPv6 setup to bypass blocklist issues.

Understanding Auto-configured Interfaces SLAAC (accept_ra1) on Non-Router Devices

This article explains the concept of Auto-configured Interfaces using Stateless Address Autoconfiguration (SLAAC) with the accept_ra1 option on non-router devices. It covers IPv6 specifications and the restrictions on using multiple external interfaces.

Troubleshooting Network Speed Issues with Multiple Devices on a Local Network

Learn how to diagnose and resolve network speed issues when using a local network with around 200 PCs connected through approximately 8 routers and around 30 devices experiencing slow download speeds.

Half-Working Routedocker subnet with WireGuard: Docker Subnet 192.168.50.0

In this tech support article, we will discuss a half-working issue with Routedocker subnet 192.168.50.0 using WireGuard. We will go through the client wg0.conf file and the setTable configuration.

Understanding DNS Server 'end::1' - A Basic Tech Support Question

In this article, we will explain what 'end::1' is in the context of a DNS server, and clarify any potential confusion around its use in internet redirection.

Does Ping Vary Different Ports and IPs in Gaming?

Users report various gaming-related issues, and one common concern is whether ping varies depending on ports and IPs. In this article, we'll clarify this question and provide helpful insights.

Configuring User Mode Networking with virt-install: A Comprehensive Guide

In this tech support article, we will guide you through the process of configuring user mode networking options such as port forwarding, SMB shares, DHCP, and more with virt-install. Although virt-install does not provide a command-line interface to configure these options directly, we will suggest some alternative methods.

Hiding Public IP Address with Free DNS for Home Server Network

Learn how to hide your public IP address for home servers using free DynDns. This article covers setting up DynDns for various servers including Minecraft, Git, and Teamspeak, even those running on Raspberry Pi using Docker.

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