Articles about security | UserComp.com

Restricting SASL Accounts by IP Addresses in Postfix on Ubuntu 22.04

Learn how to restrict access to specific SASL accounts in Postfix based on IP addresses. This tutorial covers the steps for a small mail server running Ubuntu 22.04 with 10 allowed accounts. Follow the instructions to secure your email system.

Creating a Secure Ethernet Connection for Your PC without an IP

Many purpose-built embedded PCs are aging with insecure operating systems, often Windows. These PCs may contain critical hardware, such as medical equipment or lab devices. This article will guide you on how to create a secure Ethernet connection for your PC without an IP address.

Is Email Security Still a Concern Today?

Exploring the security of email communication in today's digital landscape, focusing on SMTP/IMAP transmissions and TLS.

Setting Up a Common Authorized Keys File for Shared Access

Learn how to set up a shared authorized keys file for two users, allowing for secure group readable and writable access. Improve your Linux security knowledge and skills with this step-by-step guide.

Understanding Actions that Help a Virus Move in a Virtual Machine Host System

This article explores the actions that may allow a virus to move within a virtual machine host system. While it is generally difficult to escape a virtual machine, there are certain exceptions and interactions that can facilitate the virus's movement.

Windows Hello: Selecting Unavailable Options on Lenovo ThinkPad P16v Gen2 External Dock

This article provides a solution for the issue of Windows Hello not allowing password managers to enter passwords automatically on a Lenovo ThinkPad P16v Gen2 laptop when using an external dock.

Configuring Firewall Port Block Rule for Private Network Access

This article provides a step-by-step guide on how to configure a firewall port block rule for private network access, ensuring that inbound probes on port 445 are blocked while allowing access to shared files within the network.

Robinhood Account Restricted: Reasons and Solutions

Robinhood may restrict accounts for various reasons, often tied to security, regulatory compliance, or unusual account activity. Common causes include insufficient funds, account age, and pattern day trading. Learn how to lift restrictions and protect your account.

Secure Setup for Editing Software on Potentially Compromised VM in Windows 11

Learn how to set up a secure VMware environment for editing potentially compromised software on a dedicated PC in Windows 11. Follow these steps to ensure maximum protection and avoid any security risks.

Understanding Special Characters in Usernames: A Guide for System Administrators

As a system administrator, you may come across usernames that contain special characters. But what is the importance of these characters in a Windows 11 system? This article explains the significance of special characters in usernames and provides tips for managing them effectively. Read more to learn more about this important system administration topic.

How to Allow Windows Defender to Leave Code Alone and Execute a File

Learn how to allow Windows Defender to leave code alone and execute a file, even if it's a file you want to run such as a CUDA setup script.

How to Stop Chrome 132's Self-Signed Certificate Nagging on Localhost

Learn how to disable Chrome 132's security warnings for self-signed certificates on localhost, making your development process smoother. This guide is optimized for SEO and can help you quickly solve the issue.

How to Make Chrome 132 Shut Down Security on localhost

This article provides instructions on how to make Google Chrome 132 shut down its security settings for localhost. This is useful when you're working with self-signed certificates on localhost.

Configure Default Shares for Drive Letters at Windows 10 Boot

Learn how to configure default shares for drive letters in Windows 10, allowing automatic connection and preventing unwanted access for specific users. Improve your system's security and efficiency.

Add Overlay of Current Temperature to IP Camera Stream with FFmpeg

Learn how to add an overlay of current temperature to your IP camera stream with FFmpeg. This guide will cover setting the stream resolution, installing FFmpeg, and adding the temperature overlay. Optimized for SEO and easy to follow.

How to Permanently Limit Windows Defender CPU Usage Without Reboot

In this tech support article, we will provide a solution to limit Windows Defender CPU usage without the need to reboot. By following the steps outlined, you can improve your system's performance while keeping it secure.

Securely Access Untrusted Linux Computer Using Git

Learn how to securely access an untrusted Linux computer and push/pull data from a GitHub account without root access.

Using Fingerprint with Firefox and Mullvad Browser

Learn how to use Fingerprint extension with Mullvad VPN on Firefox browser for enhanced privacy and security.

Python Connect Reverse Shell: A Comprehensive Guide

Learn how to create a Python Connect Reverse Shell, a powerful tool used in cybersecurity and ethical hacking. This guide provides a step-by-step tutorial on creating a Python reverse shell and understanding its functionality.

Vulnerability Report: Insecure JDK Version in K3s Cluster

This report highlights a potential vulnerability in the JDK version of a K3s cluster. The concerned pod path and vulnerable binary have been identified.

Enable HTTPS Windows Update

Learn how to enable HTTPS for Windows Update to ensure secure and validated content delivery. This guide will help you understand the benefits and steps to enable HTTPS for Windows Update.

Overcoming Challenges in Setting Up Windows Event Forwarding Policy for Security Logs

In this tech support article, we address common issues faced when creating a Windows Event Forwarding (WEF) policy to forward security logs in a modest set-up with series-load-balanced collectors running Linux. Our goal is to provide a seamless experience for your team, even if they don't wish to use specific tools.

Does Norton Security 365 block Chrome on Windows 11?

Users want to test if Norton 360 security capabilities block app access to the internet, specifically Chrome on Windows 11. They went to Norton's smart firewall page to set access for allow or block.

Norton Security 365: Why Isn't It Blocking Chrome?

Having trouble with Norton Security 365 not blocking Chrome from accessing the internet? Learn how to troubleshoot this issue and ensure your firewall settings are optimized for your needs. Read more to find out how.

Updating Windows PIN Policies for Account Password

Learn how to update Windows PIN policies for account passwords to ensure secure login. This article provides a step-by-step guide to change PIN policies and troubleshoot any issues that may arise.

Configure ClamAV + C-ICAP server

This article guides you through the process of configuring a ClamAV server with C-ICAP for antivirus scanning. Follow this easy open-source solution to protect your network from malware.

Restricting SSH Access for wheel Group Users in Red Hat 9 using PAM's pam_access.so - Not Denying Access

Having trouble restricting SSH access for users in the wheel group using pam_access.so in Red Hat 9? This article provides a brief overview of the issue and invites readers to explore a tech support solution.

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.

Understanding JShelter's Browser Fingerprint Protection

This article provides an overview of JShelter's browser fingerprint protection, a mode recommended by JShelter for securing websites from fingerprinting. We will discuss the recommended mode for the ThumbMarkJS site, which generates a unique hash for every page load.

How to Disable or Reactivate Personal Vault in Windows 11?

Learn how to disable or reactivate Personal Vault in Windows 11. Follow the usual steps to manage your Personal Vault settings and options. Don't get rid of your Personal Vault - simply deactivate it.

How to Set Chrome to Automatically Convert HTTP Download Links to HTTPS

Learn how to set Google Chrome to automatically convert HTTP download links to HTTPS, ensuring secure downloads and avoiding the 'Insecure download blocked' error message. Improve your browser's security and protect your data.

SSH Servers: Can They Use Push Authentication for Login?

Exploring the possibility of using push authentication for logging into SSH servers like OpenSSH, and understanding how it differs from traditional PKC-based authentication.

How to Disable Windows Hello Initial Logins, Yet Allow Unlocks

Learn how to disable Windows Hello as the initial login method, while still allowing users to unlock their devices using biometrics after logout or reboot. Similar to Android's PIN requirement after reboot.

Secure Git Commits Server: Setting Up Private GPG Key with SSH Login

Learn how to set up a private GPG key for secure Git commits on a server, enabling SSH login. This guide covers the steps for configuring a private GPG key using the HOCKEYPUCK keyserver.

Enforcing SSH Private Key Passphrase Complexity

This article discusses enforcing complex passphrases for SSH private keys, similar to how PAM's pwquality module enforces user account password complexity. Let's explore the options.

Safe Way to Run Games on MSI Windows 10 Home Laptop Without Trusting Developers

MSI Windows 10 Home laptop struggles to run certain games fully, as it doesn't fully trust developers. Here's advice on how to run less graphics-intensive games safely.

Linux: SELinux Prevents Unintentional Sharing of Sensitive Data

SELinux is a Linux kernel security module that helps prevent unauthorized access to sensitive data by controlling the flow of data between processes and between the kernel and user space. This article explains how SELinux works and how to configure it to improve system security.

Understanding SElinux and Mandatory Access Control for Linux and MacOS

Learn about Sensitive Compartmentalized Information and how SElinux is used to prevent accidental sharing of sensitive data in Linux and MacOS systems. Discover the benefits of Mandatory Access Control and how it can enhance the security of your system. Read more to find out how to implement SElinux for your tech support needs.

How to Set Up a StrongSwan Local VPN Server with Private and Public Subnets

Learn how to set up a StrongSwan local VPN server with two subnets, one private and one public, and a proxy host with two network interfaces connected to both subnets. The private subnet has no internet access, while the public subnet does. This tutorial will guide you through the process of creating a secure and private network environment.

Preventing Email Spoofing: Implementing SPF, DKIM, and DMARC for Outlook

Email spoofing is a common security issue faced by Outlook users. Implementing SPF, DKIM, and DMARC records can help prevent email spoofing and ensure email authentication. Learn how to set up these records for your Outlook email account.

How to Come Intel(R) Local Platform Erase and Erase SSD with Microsoft BitLocker

Learn how to come Intel(R) Local Platform Erase and erase SSD using Microsoft BitLocker. This guide covers the necessary steps for a successful erasure.

MacOS 15.2: Password Bug Creates Concern

A recently discovered bug in MacOS 15.2 has raised concerns among users regarding password security. The bug, which has occurred due to a recent update, has sparked general curiosity about the updated Mac system. This article provides information about the password bug and its potential impact on users.

How to Disable or Remove Persistent Malicious Software on Windows

If you're constantly getting alerts about a malicious software on your Windows computer, this guide will help you disable or remove it. Learn how to deal with persistent malware and secure your system.

Signs of Keyloggers and PC Invasions: A Tech Support Guide

Learn how to identify signs of keyloggers and unauthorized PC invasions. Protect your privacy and sensitive data with this comprehensive tech support guide. Includes tips on detection and prevention. #keyloggers #PCinvasion #cybersecurity

Do Public FTP Servers Require SSL/TLS Control Channel?

This article discusses the necessity of SSL/TLS control channel for public FTP servers, with an example of IBM's FTP server. We'll show you how to connect to such servers using Linux shell FTP clients like lftp or ncftp.

What Folder or File is Currently Being Scanned by Microsoft's Antimalware Service Executable?

If you've noticed Microsoft's Antimalware Service Executable taking up a significant amount of your CPU, you might be wondering what folder or file it's currently scanning. This article provides insights on how to find out and ways to manage the scanning process.

Explicitly Dropping IPv6 Packets with ip6tables - A Tech Support Guide

Learn how to explicitly drop IPv6 packets using ip6tables, a powerful networking tool for Linux systems. This guide covers the basics of using ip6tables to manage IPv6 traffic and enhance network security. Follow along with the example command and tcpdump output to see packets being dropped. If you're a tech support professional or a network administrator, this article is for you.

Prevent User Logs from Being Recorded Locally After RDP Session Closure on Windows 11 Pro

This tech support article provides a solution for users of two PCs running Windows 11 Pro, where one is placed in the office and the other at home. Specifically, it addresses the issue of user logs still being recorded on the office PC even after logging off via Remote Desktop Protocol (RDP). Learn how to prevent this behavior and enhance your security measures.

Is It Possible To Create A Public Website That Allows Linux Systems And Blocks Windows Systems?

Exploring the possibility of creating a public website that supports Linux systems while blocking Windows systems. Familiar tools such as Apache2, Nginx, Bind9, Iptables, and Mitmproxy may be involved. Find out how it can be done and the implications of such a setup.

Connection to Port 443 Denied: Netstat Suggests an Open Issue?

Users reporting access to their local development website (e.g., https://castle.accessed) is being denied, despite netstat suggesting an open connection on port 443. This article will discuss possible causes and solutions for this issue on Windows 10 with an Apache server.

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