Articles about network security

Avoiding Nftables Configuration Mistakes: Allowing Outgoing SSH Connections

Learn how to avoid a common mistake when configuring nftables to allow outgoing SSH connections to a backup server. Make sure to follow best practices and test your rules before implementation. #nftables #Linux #networksecurity

Configure iptables to Allow NTP Time Synchronization with Internet Access Blocked

Learn how to configure iptables to block all internet access except for NTP time synchronization, allowing machines on your LAN to stay synchronized with the correct date and time. This tutorial provides a step-by-step guide for setting up a secure network while ensuring accurate timekeeping.

Securing Your Home Network: Addressing Known Vulnerabilities

Is your home network setup vulnerable? If you suspect your Spectrum modem/router or work PC may be compromised, take action. Learn how to secure your home network by addressing known vulnerabilities and protecting your devices.

Rogue Camera Feed: Unknown Device Accessing Network & Switching Ports

Encountered a rogue camera feed on your network, accessing different ports in timed successions and capturing video clips from an unknown source? Learn how to track, catch, and mitigate this security concern. Read more for tech support insights.

How to Create a Draytek Firewall Rule to Isolate an IP

Learn how to create a firewall rule on a Draytek 2860 router to isolate a specific IP (e.g. 192.168.1.8) from accessing the network, except for the gateway (e.g. 192.168.1.1). Follow these steps to enhance your network security.

Setting up PFSensor on a Router for Pre-existing Networks: A Tech Support Guide

In this tech support article, we'll provide advice on whether it's possible to split a WAN port into two separate networks and set up PFSensor on a router. Follow this guide for an openVPN-based solution based on Louis Rossmann's tutorial.

Implement Small Program for 802.1X RADIUS Client Authentication on Windows

This article provides a guide to implementing a small program that allows users to enter a username and password, and performs authentication using a free RADIUS client for 802.1X on Windows. Stay tuned for the full article with step-by-step instructions and best practices.

Identifying and Dealing with Phantom Devices on Your Network

If you suspect that your network is being accessed by unknown devices, it's important to take action. This article will help you identify and deal with phantom devices on your network, which could be a sign of malware or a remote access trojan (RAT).

How to Configure Open DNS Settings on Nokia Beacon 6 Router: A Comprehensive Guide

Learn how to configure Open DNS settings on your Nokia Beacon 6 router to enhance network security and improve online experience. This step-by-step guide will help you manage and protect your home or business network with ease. Read more to get started.

PMKID Attack on WPA2-PSK: Prevention and Troubleshooting

Learn about PMKID attacks on WPA2-PSK networks, their impact, and prevention methods. Discover how to troubleshoot and secure your Wi-Fi connection.

Security Concerns of Using Dynamic DNS IPs Behind a NAT Router for a Private Home Network

Learn about the potential security risks of using Dynamic DNS IPs behind a NAT router for a private home network, such as an OwnCloud server.

Port Alerts on Honeypot: Inbound SMB Connection from 192.168.1.1

Over the past two months, we have been using a Honeypot to secure our household network. Recently, we have been receiving Port Alerts for an inbound SMB connection from 192.168.1.1. In this article, we will discuss the potential risks and suggested steps to mitigate this issue.

DNS Spoofing Still Fails: Extensive Troubleshooting for Wireless LAN Issues

Experiencing DNS spoofing issues on your wireless LAN? This article provides extensive troubleshooting steps to help you secure your network and prevent evil servers from redirecting your victim devices to unintended websites.

Stop Windows 10 Firewall Warnings with GPO Enabled: A Tech Support Guide

Learn how to stop Windows 10 firewall warnings when GPO is enabled on your managed network or Server 2016 clients. This guide provides a concise and SEO-optimized solution to a common issue in network management. Read more for expert tech support.

7-Day Average CPU/RAM Usage for Fortigate Machine: A How-To Guide

Learn how to create a 7-day average usage report for your Fortigate machine's CPU and RAM. This step-by-step guide will help you manage your Fortigate device more effectively. Improve your network security and optimize performance with the right data.

How to Whitelist Certain URLs in a Network of Several Hosts

Learn how to whitelist certain URLs in a network of several hosts, allowing access to specific websites while blocking the rest for certain hosts. Improve network security and control web access with this step-by-step guide.

How to Secure Your TFTP Server on Ubuntu for Better Network Protection

In this tech support article, we will guide you through the steps to secure your TFTP server on Ubuntu. By following these instructions, you can ensure better network protection and prevent unauthorized access. Read more to learn how to secure your TFTP server today.

How to Block Port 135 on Windows 11 Using Windows Firewall?

Learn how to create a rule to block port 135 on Windows 11 using the built-in Windows Firewall. While you may be able to create the rule, the port might still appear open in nmap output. This article will help you understand if the port is successfully blocked or not. Thanks for reading!

Secure Your Network with Proxmox Firewall: How to Block Traffic and Allow Specific IP Ranges

Learn how to set up and configure the Proxmox firewall to secure your network using Netbird (a Wireguard-based VPN) on a Proxmox PVE 8/Debian 12 server with various containers. This tutorial covers Proxmox firewall basics, such as blocking traffic and allowing specific IP ranges through SSH.

Using Wireshark to Catch Students Cheating: A Network Admin's Perspective

In this article, we'll explore how Wireshark, a popular network protocol analyzer, can be used by network administrators to detect students cheating during online exams. We'll discuss the setup and configuration required to monitor network traffic, identify suspicious patterns, and provide actionable insights.

Encrypt Local Traffic: Setting Up WireGuard for Gateway Services

Learn how to set up WireGuard for secure gateway services, allowing remote access to hosted services on a physical server without exposing them.

Configuring FQDN Filtering on Zyxel ATP700 for Static External IP Subdomains

Learn how to configure FQDN filtering on Zyxel ATP700 for static external IP subdomains. This article provides a step-by-step guide to help you secure your network.

Configure VPN to Allow Select Number of Domains, Block Traffic to Everything Else: A Tech Support Guide

In this tech support article, we'll guide you through the process of configuring your VPN to allow access to a select number of domains while blocking all other traffic. This can be particularly useful for enhancing network security and improving overall internet performance.

Understanding Snort: Configuring <dir>paths</dir> in Tech Support

Learn how to configure Snort's <dir>paths</dir> in a tech support context. Snort is an open-source network intrusion prevention system (NIPS) and network security intelligence platform for Linux, Windows, and other systems. In this article, we'll walk you through the process of setting up Snort's <dir>paths</dir> for optimal performance and security. Try making this SEO optimized using the given keywords.

Configuring Captive Portal with pfSense: Prevent Unauthorized Wi-Fi Users

Learn how to configure Captive Portal on pfSense to manage and secure Wi-Fi access for your network. Prevent unauthorized users from connecting and ensure secure browsing.

NFTables: Using Ethereum Addresses for Forward Chain Filtering

Learn how to use Ethereum addresses for filtering traffic in NFTables, a next-generation firewall technology.

Isolating Network Clients Using Different Subnets and Downstream Routers: A Solution?

When a network host potentially infected with malware is able to reach and replicate on other network hosts, possibly even cracking SMB passwords, it's crucial to take immediate action to prevent further damage. One effective solution is to isolate affected clients using different subnets and downstream routers.

Suspicions of Compromised Network: Ive Got Some Concerns

Ive noticed some suspicious activity on my network and Im concerned that it may have been compromised. Ive seen multiple IP addresses accessing my system and Im not sure what to do next. If you have any advice on how to investigate and mitigate this issue, Id appreciate your help.