Articles about networking | UserComp.com

Communicating Two Subnets: ISP Modem Router (Huwawei EG8145V5) and Xiaomi AX3000

Learn how to configure and communicate two subnets using a Huwawei EG8145V5 ISP Modem Router and a Xiaomi AX3000 router. This tech support article covers setting up the LAN and WAN ports and establishing a connection between the two networks.

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

Learn how to set up and troubleshoot WireGuard client connections in Docker and Kubernetes environments. Resolve unique connectivity issues in your Kubernetes configuration.

How Do NAT Rules on One Computer Affect Traffic on Another?

Learn how NAT rules on one computer can impact traffic on another when both are connected behind a router.

Windows 11: Network Connection Error with SL/TLS (0x8004210A)

Users of Windows 11 have reported encountering a network connection error with SL/TLS (Secure Sockets Layer/Transport Layer Security) identified by error code 0x8004210A. In this article, we will discuss potential causes and solutions for this issue.

CentOS Stream 9: Frequent 'Nameserver Not Known' Issue

A CentOS Stream 9 server, directly connected to a router, is functioning well except for the frequent occurrence of the 'Nameserver Not Known' error. In this article, we discuss possible solutions to resolve the issue.

Configuring Pi-hole Service for 192.168.0.0/16 Subnet

Learn how to configure Pi-hole to serve ads blocking for the 192.168.0.0/16 subnet. Follow these steps to set up Pi-hole on Ubuntu 22.04 with Proxmox, FTL v5.25.1, and Pi-hole v5.18.2 and Web Interface v5.21.

Understanding the Use of I Option in Traceroute Command with Netfilter Firewall

In this tech support article, we will discuss the use of the I option in the traceroute command when dealing with a Netfilter firewall. Two different packages have been tested to provide a clear understanding of this concept.

Setting up a Second Router as a Parasite Router: Forward Ports

Learn how to set up a second router as a parasite router and forward ports for personal devices. This guide covers the process for both Linux, Windows, and MacOS.

Using Loopback IPs on macOS: A Solution for Binding Random Addresses

Learn how to use loopback IPs on macOS and solve the issue of binding random addresses within the 127.0.0.0/8 subnet. Follow this guide to create an alias and make it work.

Ubuntu 22.04 VM on KVM/virt-manager Not Connecting to Internet

This article provides a solution for users experiencing issues with their Ubuntu 22.04 VM not connecting to the internet when installed on KVM using virt-manager.

Find Source Bandwidth Cap for Ubuntu 22.04 LTS Workstations

Learn how to find the source bandwidth cap on Ubuntu 22.04 LTS workstations for coworkers with different jobs.

Two Computers with Widely Different Download Speeds: Troubleshooting

Two identical computers connected to the same unmanaged switch via 2.5 Gbps NICs exhibit significantly different download speeds. This article outlines potential causes and solutions for this issue.

Deep Dive into PORT Number Confusion: OS Node Packet Received Unexpectedly

In this tech support article, we delve into the confusion surrounding PORT numbers and unexpected OS node packets. Learn how to identify and resolve this issue.

Proxmox Linux Bridge: Binded IP not Working (50% of the Time)

This article explains a common issue with Proxmox Linux Bridge where the binded IP address fails to work approximately 50% of the time. We'll provide a potential solution to help you resolve the problem.

Should I Leave Bandwidth Higher Actually? Setting Internet Connection and Prioritizing Networks

When configuring your internet connection and router settings, you may be asked about upstream and downstream bandwidth. Should you leave it higher or limit it? Let's explore the implications of bandwidth prioritization.

Connecting Two Discrete NICs on a Computer: A Tech Support Guide

Learn how to connect two discrete Network Interface Cards (NICs) on a computer and manage multiple network connections in one system. This tech support article provides a step-by-step guide.

Capturing Packets: Differences between Snapshots and Analysis of Different Packets

Learn the differences between packet snapshots and analysis of different packets during network application diagnosis. Understand when to use each method for effective packet capture.

Using Home Router IP Address as Proxy for Computer Anywhere?

Learn how to use your home router IP address as a proxy for your computer anywhere. This article covers the process for Linux, Windows, and MacOS.

Interconnecting Two Discrete NICs: Failed Routing Table Manipulation

This article provides a solution to interconnect two discrete Network Interface Cards (NICs) by manipulating the routing table. However, users experiencing issues may find that their attempts have failed. This article explains the potential causes and offers troubleshooting steps.

Windows 10 Ethernet Falls Back to 1Gbps or 100Mbps Randomly: A Solution

Users of Windows 10, version 10.0.19045, report that their Ethernet connection randomly drops to 1Gbps or 100Mbps. This issue occurs with a Realtek PCIe GBE Family Controller on a motherboard and an ASUS RT-AC66U router. In this article, we suggest a solution to help you stabilize your Ethernet connection.

Iptables Not Dropping UDP Packets with Exact IP Address

This article explains why iptables may not be dropping UDP packets with exact IP addresses and provides solutions to resolve this issue.

Routing Traffic Between Different Table/Backend Interfaces: wlan0 and wg0

Learn how to configure and route traffic between two manually configured interfaces, wlan0 and wg0, with different table/backend configurations.

Setting Up Universal Home DNS for Network Access Control

Learn how to set up Universal Home DNS to manage network access for multiple devices in a human-friendly way, keeping them securely away from direct internet access.

Configuring NAT: Main Router and Two Secondary Routers - NAT Security Concerns

When setting up a NAT network with a main router and two secondary routers, it's crucial to consider security concerns. In this article, we discuss the necessary configurations for passing traffic between routers.

Troubleshooting Network Connectivity Issues in a Workplace: A Common Conundrum for Companies with 30 People

Many small workplaces, including those with 30 people, may encounter network connectivity issues. In some cases, users cannot sign onto the work domain, instead connecting to a generic workgroup. This article provides solutions to help resolve this common conundrum.

Is it Possible to Use a Fast Switch for a Network of Older Routers?

A reader asks if they can use a fast switch with older routers to connect 10G link computers. Discover the solution in this tech support article.

Windows 11: Ethernet Cable Not Connecting to Home Screen on Facebook Marketplace PC

Learn how to resolve the issue of an Ethernet cable not connecting to the Home Screen on a Windows 11 PC purchased from Facebook Marketplace.

Accessing LAN Devices: WireGuard VPN Setup with Peers Behind Different VPN Clients

Learn how to access LAN devices when setting up WireGuard VPN with peers behind different VPN clients. This article covers the steps for a WireGuard server with public IP, AWSEC2 running Ubuntu, and new WireGuard configurations.

Setting Up a Home Lab Server Accessible Externally with Dynamic IP using Duck DNS

Learn how to set up a home lab server accessible externally with a dynamic IP address using Duck DNS. This guide covers the necessary steps for configuring your server and setting up Duck DNS.

Setting up Pi-hole on Asus GT-AX11000: Unable to Hit Anything on the Internet

Learn how to set up Pi-hole on Asus GT-AX11000 router to resolve WAN connectivity issues.

HyperV Internal Network: Unidentified Network Keeps Resetting after Windows 11 Upgrade

Learn how to resolve an issue where a HyperV internal network keeps resetting after upgrading to Windows 11, preventing file sharing access via SMB guest hosts.

Traffic Not Passing OPNsense Firewall in Hyper-V: Troubleshooting Steps

Experiencing issues with traffic not passing through OPNsense firewall in Hyper-V? Follow these steps to troubleshoot and resolve the problem.

Maintaining Connections: Keeping Network Interfaces Alive When Physically Disconnected

Learn how to configure network interfaces to stay active even when physically disconnected. This tip is particularly useful for tinkerers and system administrators.

Windows Server 2022: Inactive Reserved IP Address Used by Another Device

Learn how to resolve a conflict when an inactive reserved IP address is used by another device on a Windows Server 2022 DHCP network.

WAN Passthrough with Managed Switch: A Good Idea for ISP-Provided GPON?

Exploring the possibility and security implications of implementing WAN Passthrough with a managed switch in the context of an ISP-provided GPON setup.

Understanding Private IP Addresses: 172.16/12 Prefix

This article explains the 172.16/12 private IP address prefix, its use in local networks, and its differences from public IP addresses.

Understanding RFC1918 Private IP Address Ranges

This article explains the concept of RFC1918 private IP address ranges, including the 172.16/12 prefix. Learn about the other private IP address ranges and their significance in networking.

iPhone Not Reaching Local Server IP Address Unless Server First Pings

This article explains how to resolve an issue where an iPhone fails to reach a local server IP address unless the server first pings the iPhone. The problem occurs on a Ubuntu 22.04.3 LTS machine running Apache 2 web server, with UFW disabled.

Setting up a VPN Tunnel between Draytek Routers

Learn how to connect two Draytek routers using a VPN tunnel. This tutorial covers the process of setting up a secure and reliable LAN-to-LAN VPN connection between the routers.

Unable to Connect Kali Linux VM to Internet: VirtualBox NAT Issue

This article discusses a common issue where a Kali Linux VM running on VirtualBox fails to connect to the internet despite having a NAT network configuration. We'll explore potential causes and solutions to help you get your Kali Linux VM online.

Connecting a Device to Another Subnet using a 3rd Device Proxy: A Solution for HTTPS Web Portal Access

Learn how to connect a device to another subnet using a third device as a proxy when unable to get an Ethernet cable connection but can access Wi-Fi.

Krontek KT2000 GPSS NTP Timeserver: Unexpected Password Required for Telnet Access

This article discusses an unexpected issue with the Krontek KT2000 GPSS NTP timeserver, which requires a password for Telnet access. We will explore the possible reasons for this requirement and suggest solutions.

Setting up a Captive Portal with hostapd, apache, isc-dhcp-server, and iptables on Debian Manjaro

Learn how to set up a captive portal using hostapd, apache, isc-dhcp-server, and iptables on Debian Manjaro.

Ping/Connect KVM between Machines M1 and M2

Learn how to ping and connect KVM between two machines, M1 and M2, in a cluster environment. This guide covers the process for machine M1 to ping IP address VM on machine M2.

Connecting Nested Routers: A Tech Support Guide

Learn how to connect nested routers, such as Eero mesh WiFi and PLINK, for optimal network performance. This tech support guide offers step-by-step instructions.

Ethernet Interface Using Static Address Ignoring Defaultroute Provided by DHCP Server

This article discusses a scenario where an Ubuntu system's ethernet interface (eth0) is connected to a router acting as a DHCP server, providing a defaultroute. However, when eth0 is set to use a static address, the defaultroute is ignored. This article explains the cause and offers a solution.

Does WPA2 Not Work with Realtek RTL8822CE Network Adapter on Windows 11?

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