Articles about network | UserComp.com

Troubleshooting pFsense: Issues with Blocking RFC1918 Networks for LAN

Resolve LAN connectivity failures caused by misconfigured firewall rules or routing errors that inadvertently block RFC1918 private network traffic.

Mikrotik: Disconnect TCP Connection - Troubleshooting Guide

Resolve stale TCP sessions and enforce immediate policy changes on MikroTik RouterOS by identifying and removing specific connection IDs.

How to Use SSH/Telnet to Connect to a Remote PC Attached Device

Resolve connection issues to local devices behind a remote PC by configuring an SSH tunnel with port forwarding.

Troubleshooting Website Access Between Two Offices on Different Subnets

Resolve intermittent IIS website access failures between remote offices by fixing routing, firewall ACLs, and DNS misconfigurations.

Don't See Message in Wireshark Capture? Here's What to Do

Resolve missing TCP messages in Wireshark by verifying interface selection, enabling promiscuous mode, applying precise display filters, and checking for asymmetric routing.

Solving "No Drivers" Issue for VMware Virtual Network Card in Imported VirtualBox VM

Resolve the "No Drivers" error for VMware virtual network cards in imported VirtualBox VMs by manually selecting the correct driver via Device Manager.

Analyzing Network Traffic of an IoT Device on a DD-WRT Router

Capture and filter IoT device traffic on a DD-WRT router using Wireshark to inspect unencrypted data flows without complex configuration.

Is the Nighthawk Modem/Router Compatible with Google Nest Router?

Resolve compatibility issues between Nighthawk modem/router and Google Nest Router by configuring them for a unified network.

Is Network Hardware Becoming Harder to Set Up?

Resolves confusion over perceived setup difficulty caused by complex protocols, software-defined interfaces, and interoperability issues in modern network hardware.

Playing audio from a Hyper-V VM to its host (or any network device)

Stream Hyper-V VM audio to the host by using network-based client-server software since native audio redirection is not supported.

Cannot Bridge VM on Physical Machine despite Restoring Defaults in VMware Network Editor

Resolve VMware bridged networking failures by manually binding VMnet0 to the active physical adapter instead of using automatic selection.

Verify whether a tun interface (created by OpenVPN) offers access to the Internet

Diagnose why an OpenVPN tun interface lacks Internet access by verifying interface state, routing tables, and DNS resolution.

How to Block a WiFi Network: Step-by-Step Guide

Prevents devices from auto-connecting to unwanted Wi-Fi networks by forgetting saved profiles or using router MAC address filtering.

Mac Changer Fails to Work: Network Interface Name Changed Successfully on Debian 12.6 (64-bit)

Fix Mac Changer failing on Debian 12.6 by disabling the cloned MAC address policy in NetworkManager to prevent automatic reversion of manual changes.

How to Display Network Usage Tasks in Windows 10 Task Manager (Resource Monitor) Including Kernel?

Resolve high network usage by identifying kernel-level drivers and system services consuming bandwidth using Windows Resource Monitor.

Gigabit Internet Connection Slows Down After Introducing 4-Port Gigabit Switch

Resolve gigabit internet slowdowns after adding a switch by fixing speed mismatches, replacing faulty cables, and correcting duplex conflicts.

Windows Computer Flagged for School Network Use with BitTorrent, Despite qBitTorrent Not Running

Resolve false BitTorrent flags on school networks by disabling Windows Delivery Optimization and clearing residual network caches.

Solving Desktop Computer's Random Network Issues in the Past Weeks

Resolve random network disconnections on Windows desktops by disabling power management, updating drivers, and verifying DHCP settings.

Troubleshooting Network Media Converter Issues in Small Buildings

Resolve network instability and speed drops in small buildings by verifying SFP module fiber type compatibility and configuring full-duplex settings on media converters.

How to Connect Epson L355 Printer to a New Router

Resolves Epson L355 connectivity issues after router replacement by guiding WPS or manual network configuration.

How to Troubleshoot Networking and Wireless Issues on KDE Plasma Workspace

Resolve KDE Plasma networking and wireless failures by verifying NetworkManager status, unblocking hardware via rfkill, and diagnosing driver or signal issues.

Getting Path Name of Driver Used for Network Printer LPR-UPS on Linux Ubuntu 22.04 Server

Locate the PPD file path and DeviceURI for an LPR-UPS network printer by inspecting the printers.conf configuration file on Ubuntu 22.04.

Full Network Enumeration on Kalilinux without Assigned IP Address

Resolve network enumeration on Kali Linux without an assigned IP by using Layer 2 tools like arp-scan and nmap to discover live hosts via MAC addresses.

Activating a WLAN Adapter on Windows XP in Hyper-V with Windows 11

Resolve Hyper-V network connectivity issues for Windows XP guests by configuring an internal virtual switch to bypass wireless passthrough limitations.

Find Source Bandwidth Cap for Ubuntu 22.04 LTS Workstations

Identify active source bandwidth caps on Ubuntu 22.04 by inspecting kernel traffic control policies using tc qdisc and class show commands.

WireGuard Client Works Perfectly with Docker and Kubernetes: Troubleshooting Connectivity Issues

Resolve WireGuard connectivity failures in Docker and Kubernetes by fixing missing kernel modules, IP forwarding, and network namespace permissions.

What is a software doing when “calling home” or “phoning home”?

Explain software calling home mechanisms, telemetry purposes, and privacy risks to help users understand and control remote data transmission.

Making Home Server Accessible to Internet: Unsuccessful Attempts

Resolves home server inaccessibility by diagnosing CGNAT, double NAT, and port forwarding errors.

How to Connect an Eero Pro 6e Router to a Network Switch

Resolves the limitation of a single LAN port on the Eero Pro 6e by enabling connection to a network switch for expanded wired device capacity.

Accessing Machine Static IP Remotely via WiFi

Configure static IP reservations and router port forwarding to enable reliable remote access to a local machine via WiFi.

Several Workstations Periodically Lose Internet Connectivity

Resolve periodic internet connectivity loss on Windows 10 workstations by disabling network adapter power management, flushing DNS cache, and troubleshooting DHCP lease renewal failures.

Wireguard: Communicating Peers on Interfaces

Resolve connectivity issues between WireGuard peers on different network interfaces by configuring static routes in the AllowedIPs field.

Assigning Static IP to a Device on DHCP Range Network

Resolve IP conflicts and ensure persistent network identity by configuring a static IP address directly on the device instead of relying on DHCP reservations.

Understanding Iperf3 and Retries: A Comprehensive Guide

Optimize Iperf3 throughput on high-bandwidth, high-latency networks by using the -w flag to set an appropriate TCP window size.

Do 10G Network Adapters Require Two PCI Lanes to Pass 10Gbit?

Clarifies that 10G network adapters do not require two PCI lanes to achieve 10Gbit throughput due to protocol overhead and sufficient single-lane bandwidth.

Why do I have Asymmetrical Ethernet File Access and how do I fix it?

Fix asymmetrical Ethernet file access by resolving duplex mismatches, replacing faulty cables, and updating network drivers.

Troubleshooting WireGuard: No Access to Remote that is not a Part of AllowedIPs

Resolve WireGuard connectivity issues by adding missing remote subnets to the AllowedIPs configuration field.

Connecting OpenVPN Client to Host Server on Windows PC

Resolve OpenVPN connection failures on Windows by verifying server status, validating the .ovpn configuration file, and ensuring firewall ports are open.

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

Solve HDMI signal loss over long distances by using active HDMI-over-Ethernet extenders with Cat5e or Cat6 cables to connect remote displays.

Network shares not available in Windows scheduled task

Resolve network share access failures in Windows scheduled tasks by configuring proper user credentials, ensuring Session 0 isolation compatibility, and using UNC paths instead of mapped drives.

Troubleshooting: Wifi not working on one laptop but working on another

Resolve Wi-Fi connectivity issues on a single laptop by resetting the network stack, verifying hardware switches, and updating drivers.

Connecting to Samba Shares from Mac OS with Different Port

Resolve macOS connection failures to Samba shares on non-standard ports by specifying the port in the server address.

Is DNS-over-HTTPS (DOH) Dependent on Regular DNS Queries?

Resolves the bootstrapping dependency where DNS-over-HTTPS requires standard UDP port 53 queries to locate the provider's IP address before establishing an encrypted connection.

Identifying Devices on Windows 11 Network with APR-Scan: A Step-by-Step Guide (Ubuntu 22.04 vs Raspberry Pi OS 12)

Resolve confusion over non-existent APR-Scan by using valid ARP scanning methods to identify devices on Windows 11, Ubuntu 22.04, and Raspberry Pi OS 12 networks.

Change Default Account Windows Uses for Connecting Network Shares (Samba)?

Resolve permission denied errors on Samba shares by clearing stale Windows cached credentials using cmdkey and net use.

Enable WIN10/11 LAN File Sharing: Share Files Between Multiple PCs on Home Network

Resolve Windows 10 and 11 LAN file sharing failures by configuring Private network profiles, enabling Network Discovery, and setting folder permissions.

Find Maximum Speed for Ethernet Walls: 10Gbit Switches and Ethernet Cables

Identify the maximum Ethernet speed supported by wall cabling to determine if a 10Gbit switch will improve network performance.

Periodically Auto-Refreshing Read-Only Spreadsheets Stored in Network Location: Worksheet Function Dashboard

Solve stale dashboard data by configuring Excel background refresh and read-only network permissions for auto-updating metrics.

Routing all traffic to local socket server to act as a tunnel

Configure Windows to route all HTTP and HTTPS traffic to a local socket server by setting system-wide proxy settings via PowerShell instead of using netsh.

Troubleshooting ARP Requests with Addresses Outside Subnet on Linux Router

Resolve Linux router ARP requests for out-of-subnet addresses by correcting routing tables, interface netmasks, and proxy ARP settings.

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