Articles about work | UserComp.com

TCP Server Not Sending ACK Response for PSH, ACK Packets in C++ Linux

While implementing a TCP server socket in C++ on a Linux machine, connected to another device for high-rate data streaming (800Hz), we encountered an issue where the server was not sending ACK responses for PSH and ACK packets. In this article, we will discuss the possible causes and solutions for this issue.

L2 WiFi-to-Ethernet Bridge: Drops Internet Connection on Ubuntu Server 23.10

This article explains how to troubleshoot and resolve issues with L2 WiFi-to-Ethernet Bridge connections dropping on Ubuntu Server 23.10.

Pulling Data Across Worksheets in Google Sheets: Label1

Learn how to transfer data labeled as 'Label1' from column F in Worksheet 1 to column A in Worksheet 2 in Google Sheets.

Windows 10: Opening Socket Delay with IPv6 in Python

This article explains the issue of opening socket delay when making HTTP POST requests using Python on a Windows 10 machine with IPv6 enabled.

Bridge Mode: Configuring Docker, thingNAT, and VirtualBox for Host Communication

Learn how to configure Docker, thingNAT, and VirtualBox in Bridge Mode for seamless host communication. Improve your tech setup today.

Define Network Settings Inside Ubuntu Virtual Machine in VirtualBox

Learn how to define network settings inside a Ubuntu virtual machine running in VirtualBox. This article provides a step-by-step guide to help you configure network settings and troubleshoot common issues.

Detecting ESP8266 Traffic using Wireshark

Learn how to detect and analyze ESP8266 traffic using Wireshark, an external tool for monitoring network data.

Fixing Bridged VirtualBox Ethernet Setup: Connect Two Real Ethernet Devices in Windows 10 & Ubuntu Guest System

Learn how to configure a bridged network connection for two Ethernet interfaces in a Windows 10 host and Ubuntu guest system using VirtualBox.

Access Global Internet on iPhone via Mac Mini

Learn how to share your Mac Mini's Ethernet connection with your iPhone and access the global internet. Follow these steps to configure Wi-Fi on your Mac Mini and connect your iPhone.

Connecting Ubuntu VM's WiFi Network Adaptor on VirtualBox from Windows 10

Learn how to connect the WiFi network adaptor of a Ubuntu VM running on VirtualBox to the internet from a Windows 10 host machine.

Win10 Home: Network Devices Not Pinging Subnetwork Devices (Actiontec T3200M, Asus RT-N66U)

Users of Win10 Home report issues with pinging subnetwork devices connected to an Actiontec T3200M ISP modem/router and an Asus RT-N66U wireless subnetwork router. This article provides potential solutions.

OPNsense Hub Configuration for Blocking Communication between Two LANs

Learn how to configure OPNsense to block communication between two LANs, ensuring network security for different tenants.

Google Workspace: Setting DKIM Keys for Alias Domains

Learn how to properly set DKIM keys for alias domains in Google Workspace to ensure email deliverability.

Win10 Home: Net Network Devices Not Pinging Subnetwork Devices - Asus RT-N66U and Actiontec T3200M

Users of Windows 10 Home encounter issues with subnetwork devices not responding to pings when using Actiontec T3200M and Asus RT-N66U routers. This article provides potential solutions to help resolve the ping issue.

Connecting Two Linux Computers Behind NAT Using E2C: A Step-by-Step Guide

Learn how to connect two Linux computers behind NAT using Amazon Elastic Load Balancer (E2C) as a jumphost. Follow this step-by-step guide to set up REST APIs on both boxes and establish a secure connection.

Improve Functionality of Large Excel Workbooks with Hundreds of Sheets: Use Query Tables and XLOOKUP instead of INDIRECT

Learn how to improve the functionality of large Excel workbooks with hundreds of sheets by using Query Tables and XLOOKUP instead of INDIRECT. This method will help you avoid spilling multiple answers and enhance your workflow.

Configuring Mirror Ports on Extreme Switches for IDS Environment

Learn how to configure mirror ports on Extreme Switches for Intrusion Detection Systems (IDS) environment. This guide covers the process of deploying an IDS with Extreme Switches requiring mirror port configuration.

Users with Different IP Addresses on the Same PC in DHCP Networks

This article explains how to resolve IP address conflicts when using different IP addresses on the same PC in a DHCP network environment, such as Active Directory.

Creating a Network Bridge with wlan0, eth1 and connecting second eth0 device

Learn how to create a network bridge between wlan0, eth1, and connect a second eth0 device on Ubuntu 20.04 and Nvidia Jetson.

Unlocking and Dragging Excel VB Textboxes Freely in Protected Worksheets

Learn how to unlock and drag Excel VB textboxes around freely in protected worksheets.

Accessing a Web Server with an Ethernet Cable: A Step-by-Step Guide

Learn how to connect your laptop to a web server using an Ethernet cable. This step-by-step guide covers the basics for both Linux and Windows users, ensuring a smooth setup.

Understanding User Outer without Gateway: Sending Packets Directly

Users may be confused about the role of gateways in sending packets between networks. This article explains the concept of user outer without gateway and how it allows direct packet sending.

Sending Wake-on-LAN Packets to a Windows 11 Laptop or MacBook

Learn how to send Wake-on-LAN packets to a Windows 11 laptop or MacBook using a Python script. This article explains the process and provides a simple script for initializing the magic packet.

Troubleshooting Network Cat Communication Between Linux and Windows Computers

This article provides solutions for enabling network cat communication between a Linux and Windows computer. While both systems can connect via Ethernet, one (Windows) refuses to send or receive data.

Connecting Printer to Laptop via Network: XB8 Router and Canon TR4520 Printer

Learn how to connect your Canon TR4520 wireless printer to your new laptop via a 2.4GHz network on an XB8 router.

Understanding Netstat-b: Curious Connections and System Pleas

Learn about the Netstat-b command and its use in identifying active connections on a Windows system. Discover what it means when someone asks 'curious connections upon using netstat-b please?'

Configuring VLAN and Part Bridge on a Linux Server (4.9.337)

Learn how to configure VLAN and part bridge on a Linux server running version 4.9.337. This article assumes you have a private server on the internet that serves as a router, Wi-Fi access point, and many other things.

Calculating Bandwidth in Computer Networks: Understanding the Difference between Upper and Lower Frequencies

Learn how to calculate bandwidth in computer networks by understanding the difference between upper and lower frequencies. Discover the importance of frequency ranges in network communication.

Finding Optimal MTU Size Using Win11 PowerShell Script: A More Reliable Approach

In this tech support article, we'll explore an alternative approach to finding the optimal MTU size using a PowerShell script on Win11, as the ping command may not provide accurate readings.

Troubleshooting Inspircd: Not Assigned Requested Address

This article provides a solution for the Inspircd IRC server not being able to assign the requested address. Compiled on Jun 8, 2024, this issue may occur due to various reasons such as firewall settings or network configuration. Follow the steps below to resolve the issue.

Finding Optimal MTU Size using PowerShell Script on Win11: A Better Approach

In this tech support article, we will discuss an issue where using a PowerShell script to find the optimal MTU size on Win11 via the ping command was not providing accurate readings. We will explore a better approach to determining the optimal MTU size.

VMware Workstation Pro: Unable to Download due to 'No Entitlement' Error

Users attempting to download VMware Workstation Pro encounter a 'No Entitlement' error, preventing the installation. This issue arises when clicking the download button results in a migration to Broadcom, which then denies the download.

NAS Folder Inaccessible on Windows: Network Credentials Give Access Denied

Learn how to resolve access denied issues when trying to access a NAS folder on Windows using network credentials.

Troubleshooting Network Interfaces Dropping Connections: A Three-Machine Setup

Learn how to configure three machines with two 10GbEthernet interfaces each, creating a fully connected network without using a switch, while addressing interfaces dropping connections.

Setting Up a Business Wi-Fi Network: Allow Internal Access Only

Learn how to configure a Business Wi-Fi network to allow internal access only, preventing users from accessing the internet.

Decreasing Probe Size in FFmpeg: When Does Audio Stop Working?

Learn how decreasing probe size in FFmpeg can impact audio playback, and discover the optimal probe size for minimal delay across corporate networks.

Connecting Linux Industrial Device to Factory Network for Backup

Learn how to connect a Linux Industrial Device to a Factory Network for data backup. This guide covers connecting Linux devices with IP addresses such as 172.31.20.x to a Factory Network.

Decreasing Probe Size Stops Audio in Corporate WAN: A Tech Support Issue

Learn how to resolve an issue where decreasing probe size in a corporate WAN setup results in stopped audio. This tech support article offers suggestions for Linux, Windows, and MacOS users.

Invalid Approval Create Request Assigned with No Valid Users: Troubleshooting on Tech Support Sites

This article discusses the issue of an Invalid Approval Create Request being assigned with no valid users on various tech support sites within the StackExchange Network. We'll explore possible causes and solutions to help you resolve this problem.

Strange Behaviour in Router Logs: Port Forwarding Issue

For the past few days, I have noticed some unusual activity in my router logs, specifically in the Port Forwarding section. This issue appears to be affecting different PCs. In this article, we will explore potential causes and solutions for this problem.

Laptops Lose Internet Connection Momentarily When Another Device Connects to Router

Some users report that their laptop devices lose their internet connection momentarily when another device connects to the same router. This issue can occur on various operating systems and is often resolved by adjusting network settings or updating the router firmware.

Resolving Extreme Lypeculi Network Issues with MSI B650M-A WiFi Motherboard

Experiencing extreme network issues with your desktop PC, specifically the MSI B650M-A WiFi motherboard? Learn how to troubleshoot and resolve Wi-Fi and Ethernet connection problems.

Newly Connected Devices Not Connecting on Ubuntu 24.04 Router

Users of Ubuntu 24.04 servers running a netlink Gpon router have reported issues with newly connected devices not connecting to the network. This article provides a potential solution to help resolve the problem.

Setting Up One Router for Two Subnets: A Beginner's Guide

Learn how to set up a router for two separate subnets, allowing two different LANs to connect. This beginner-friendly guide covers the basics of routing and IP addresses.

Cannot Connect Wireless Network on HP Laptop: Solutions

Learn how to troubleshoot and resolve wireless connection issues on HP laptops running Windows 10.

Disabling Side Channel Mitigations in Windows 10 VM with WSL-2 and Workstation (Version 17.0.2 build-21581411)

Learn how to disable side channel mitigations in a Windows 10 VM running with WSL-2 and VMware Workstation, even when Hyper-V is disabled.

Raspberry Pi: Outbound Connections Blocked - Recent Departed IP Address Changed

A user reports an issue with their Raspberry Pi running RaspberryOS12 (Debian Bookworm), where an outbound connection from IP address 172.16.1.17 was working fine but has been replaced by a new IP address 192.168.0.117. This article aims to help diagnose and resolve the issue.

Understanding Network Interfaces: A Pre-VPN Installation Overview

A new Mac user seeks to understand their network interfaces' normal behavior before installing a VPN. This article provides an overview of network interfaces, their functions, and expected behavior prior to VPN installation.

Unable to Ping Hyper-V Host from Ubuntu VM: A Networking Issue

This article discusses a networking issue where an Ubuntu VM hosted on Hyper-V is unable to ping the Hyper-V host. Possible solutions include disabling firewalls, assigning static MAC addresses, and checking network adapter settings.

Big Ping Delays Affecting Specific Webpages: GW01-N.contabo Issue

Last week, we encountered unexpected delays of approximately 150ms on certain webpages, primarily occurring evenings around 19:00 GMT+2. Typically, delays were within the normal range of 20ms. To address this issue, we ran diagnostics on our GW01-N server at Contabo.

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