Articles about firewall

Windows Defender Firewall not blocking Internet connection

Users report that their Internet connection is still active despite having Windows Defender Firewall enabled. This article will guide you on how to troubleshoot and resolve this issue.

Windows Native Firewall: Add/Modify Rule Using GUI - Remote IP Address

This article provides a step-by-step guide on how to add or modify a rule in Windows Native Firewall using the Graphical User Interface (GUI). We will focus on the 'Scope' tab and the 'Remote IP address' field, using predefined values such as 'Local subnet' as an example.

How to Block a Specific File Name Regardless of Location in Windows 11 Firewall

Learn how to block a specific file name, such as '123.exe', regardless of its location on your Windows 11 system using the Firewall. This guide will help you secure your system effectively.

How to Allow Group IPs on a Single NIC in Windows Server 2022 for Exclusive Access

In this tech support article, we will guide you through the process of allowing a group of IPs exclusive access to one NIC in Windows Server 2022. This is useful for remote users who require access to specific ports on a single NIC, without interference from other users. Read on to learn how to configure your firewall settings for this scenario.

Troubleshooting Return Traffic Not Routed Properly Through Passthrough Server

Having issue with return traffic not routed properly through your passthrough server? Learn how to identify and resolve this common networking problem. Improve your technical skills with our step-by-step tutorial. Read more...

Can't Delete Firewall Rules on macOS 15 (Sequoia) - Tech Support

Having trouble deleting firewall rules in macOS 15 (Sequoia)? Follow these steps to resolve the issue and secure your system. Learn more.

How to Fix 'Destination Host Unreachable' Error on Your Laptop

Having trouble connecting to the internet on your laptop? Learn how to fix the 'Destination Host Unreachable' error by flushing the DNS, checking the firewall, and more. This SEO-optimized article provides step-by-step instructions for both Windows and MacOS users. Read more for a solution to your tech support needs.

PowerShell Issue: New-NetFirewallRule Running Script Triggered by Exchange Event 1035

In this tech support article, we will discuss an issue where a PowerShell script that triggers an Exchange event 1035 (failed logon frontend port 587) extracts the source IP address from the event data and performs a 'whois' lookup. This issue is commonly faced by Windows users and can be resolved by following a few simple steps.

Troubleshooting Wireguard and Firewalld Connectivity Issues on Debian Linux and Fedora

Having trouble connecting to the internet beyond a Wireguard peer on a Debian Linux VPS or Fedora laptop running Firewalld? Learn how to troubleshoot and resolve this issue in this tech support article.

Windows Server 2019 Firewall Settings Blocking Key Pair Authentication

An application running on a cloud server (Windows Server 2019) uses key pair authentication for SFTP file uploads to vendors' FTP sites. The setup works perfectly during development, but now the firewall is blocking the key pair authentication.

Kubuntu UFW: Block Incoming, Allow Outgoing

This article explains how to configure UFW on Kubuntu 24.04 to block incoming connections and allow outgoing ones. It follows the default UFW settings and enables the firewall to protect your system.

Firewall in Bridged LXC Containers on Alpine Linux

Learn how to implement a firewall inside LXC containers on Alpine Linux, bridged to another LXC container on the same system using the br0 interface.

Understanding Conflicting Rules in Windows Defender Firewall for PyCharm 2024.2.3

Exploring the issue of conflicting rules in Windows Defender Firewall when allowing PyCharm 2024.2.3 to communicate on public networks. Get insights on potential solutions and ways to troubleshoot.

VPN Client Can't Connect to Windows VPN Server: Firewall Issues

This article provides solutions to a common issue where a VPN client can't connect to a Windows VPN server due to firewall problems. We'll guide you through steps to turn the firewall on and off, show error messages in Event Viewer, and more.

Understanding Strange Source Destination IP Address Entries in Win10 Firewall Log

Learn about unusual Source Destination IP address entries in the Windows 10 Firewall log, including possible causes such as router issues, DoS attacks, or misconfigurations.

Speed Up OpenVPN on pfSense Firewall for Dedicated Cloud Server

Learn how to optimize OpenVPN performance on a pfSense firewall (2.7.2-RELEASE) running on a dedicated cloud server with 16GB RAM. This guide will walk you through the process of improving internet access for the server and connecting a laptop through the firewall. Follow these steps to improve your OpenVPN experience on pfSense.

Configure Hyper-V VMs network adapter to use WSL (Hyper-V firewall)

This article explains how to configure the network adapter of a Hyper-V VM to use WSL and the Hyper-V firewall, resolving the issue of no internet connection in the VM launched. The default switch of the VM's internet connection is addressed.

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.

Sony Bravia TV Sending UDP Packets: Firewall Block Issue

This article discusses an issue where Sony Bravia TVs are sending UDP packets and getting blocked by a firewall. It provides solutions to resolve this issue on Linux, Windows, and MacOS.

Sony Bravia TVs Sending UDP Packets - Firewall Blocked

On January 09, 2016, users reported Sony Bravia TVs sending UDP packets that were blocked by their firewall. This article provides insight into the issue and potential solutions.

UFW Firewall Preventing Gnome Display Screensharing on Fedora Laptop

This article discusses a problem where UFW firewall on Fedora laptop prevents Gnome display screensharing. The article provides a solution to this problem.

Adding Windows Firewall Entries for the ChatGPT Desktop App

This article explains how to add four specific entries to the Windows Firewall for the ChatGPT Desktop App, ensuring smooth operation even when firewall settings are modified.

Configuring a 7-layer Virtual Firewall on M2 MacBook Sequoia for YouTube Video Categories

Learn how to configure a 7-layer virtual firewall on your M2 MacBook Sequoia to filter YouTube videos based on categories. Improve your online security and privacy now.

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.

How to Enable App Connect Outbound Despite Blocked Default Microsoft Defender Firewall in Windows 10

Learn how to enable app connect outbound despite blocked default Microsoft Defender Firewall in Windows 10. Follow these steps to allow your new app to connect to the internet even when the firewall is enabled.

Setting Up a Firewall on Ubuntu Network Gateway for a Virtual Network with VirtualBox

Learn how to set up a firewall on an Ubuntu network gateway for a small virtual network using VirtualBox. Improve network security by configuring firewall settings and controlling incoming and outgoing network traffic. Read more to get started with this simple and effective networking technique.

Cannot Ping Kali Ubuntu from Ubuntu: A VirtualBox Firewall Issue

Learn how to resolve the issue of not being able to ping a Kali Ubuntu virtual machine from the host Ubuntu system using VirtualBox. This article explains the firewall settings that need to be configured.

Refresh Windows Firewall Modification with PowerShell's NetSecurity Module

Learn how to modify Windows Firewall rules using PowerShell's NetSecurity module and refresh the firewall without rebooting. This SEO-optimized article provides a step-by-step guide to using the New-NetFirewallRule command for firewall modifications.

Creating a Reachable Device Behind a NAT Firewall using a Writable Socket Server API with Persistent Connections

Learn how to create a reachable device behind a NAT firewall by implementing a Writable Socket Server API with persistent connections.

Limiting Outbound Traffic for Specific Servers/PCs in Win11 Firewall

Learn how to limit outbound traffic for specific servers or PCs using the Windows 11 Firewall. This guide covers the process for both .exe and .java applications.

Running Docker on AlmaLinux: Troubleshooting Firewall Issues with CFFirewall (firewall script)

Learn how to resolve Docker compatibility issues with the CFFirewall firewall script on AlmaLinux.

Configuring UFW Forwarding Range Ports for Containers

Learn how to configure UFW (Uncomplicated Firewall) to forward a range of ports for containers using iptables. This article includes a step-by-step guide and an example.

Unblock Windows Firewall for Specific IP Address in WSL 2

Learn how to unblock a specific IP address in the Windows Firewall for WSL 2, allowing the use of a proxy app from the command line with the WSL 2 IP address. This guide covers reading firewall logs, understanding firewall rules, and updating the Windows Defender Firewall to allow connections from the WSL 2 IP address.

Optimizing Firewall Configuration with Iptables: A Comprehensive Guide

Learn how to optimize your firewall configuration using Iptables. This article covers the basics of Iptables and provides tips for configuring the INPUT, FORWARD, and OUTPUT chains, as well as handling port scans and setting up rules for specific services such as SSH and HTTP. Improve your system's security and performance with these expert recommendations.

How to Fix Firewall Reducing Maximum Download Speed on Celeron J1900 ARH Linux Router

Learn how to fix an issue with Firewall reducing the maximum download speed on a Celeron J1900 processor-based ARH Linux router. Follow the steps in this guide to optimize your network connection.

Network Infrastructure Upgrade Ideas for 7 SSL VPN Sites with SonicWall Firewalls and Dynamic DNS

Discover effective network infrastructure upgrade ideas for connecting 7 sites using SSL VPN, SonicWall firewalls, and Dynamic DNS. No VLANs, load balancers, or complex configurations involved.

Configuring Firewall Rules for WireGuard: Allow Connections between PC1 (10.0.0.1) and PC2 (10.0.0.3)

Learn how to configure firewall rules for WireGuard on Linux to allow connections between PC1 (10.0.0.1) and PC2 (10.0.0.3).

Old Agnitum Outpost Firewall Compatibility with Win10 Pro (64bit) without XPSP3 Compatibility Mode

Learn how to install and use the old Agnitum Outpost Firewall on a 64-bit version of Windows 10 without using XPSP3 Compatibility Mode.

CSF Blocks FTP Downloads from Remote Servers in AlmaLinux 9/CentOS 7 Migration

Experiencing issues with FTP downloads from remote servers during AlmaLinux 9 or CentOS 7 migration? Learn how the Config Server Firewall (CSF) may be causing the problem and how to resolve it. This SEO-optimized article provides a solution for tech support professionals and enthusiasts encountering this issue.

Configuring Redirect NTP Responses on pfSense

Learn how to configure pfSense to redirect NTP responses for improved network security. This approach goes beyond simple iptables redirection.

Reworking Home Network: Improving LAN/WAN Reach with Firewall, Router, and Server

After thinking for days, it's finally time to rework your home network to enhance its reach. This article covers improving LAN/WAN coverage using a firewall, router, and server. Stay tuned for more comprehensive guides on setting up your network for optimal performance.

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.

Fast Firewall/DPI System Finds SSH Server IP with Random Port

Traditional methods of sniffing SSH traffic on port 22 may not reveal the server IP address when hard firewalls or DPI systems are in place. However, a fast firewall/DPI system can find the SSH server IP address even when it's using a random port, which can be around 60k possibilities. This feature provides an efficient way to secure and manage SSH traffic.

Troubleshooting FTP Client Connection: Ports Open in Firewall?

Having trouble connecting your FTP client to a production machine while everything works locally? Learn how to check if the required ports are open in the firewall to establish a successful FTP connection.

Escaping Corporate Proxy & Firewall with HTTP Tunnel Proxy Solutions

If you're unable to make SSH direct traffic connections through your corporate HTTP proxy server, consider HTTP tunnel proxy solutions. This article introduces you to the concept of HTTP tunnel proxies and suggests some of the best solutions for Linux, Windows, and MacOS. Learn how to bypass corporate firewalls with HTTP tunnel proxies and enhance your network security.

UFW Temporarily Rejects Port localhost for Testing: A Tech Support Guide

Having trouble with UFW temporarily rejecting port localhost for testing? Our tech support guide will help you understand and resolve the issue. Learn about firewall configurations, Port 8391, and more.

How to Restrict Access to a Specific IP on Port 1111 with UFW

If an application is running on port 1111 and you want to allow access only from a certain IP address, UFW can help. This tech support article provides instructions on how to restrict access to a specific IP on port 1111 with UFW. Try these steps for a secure and optimized system. Read more for a detailed guide.

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!

Managing Windows Firewall with Local Admin Permissions: Overriding Group Policy Limits

Learn how to manage Windows Firewall as a local admin, even when group policy limits are in place. Discover how to override these limits and create firewall exceptions to ensure network security.

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.

Articles about firewall | UserComp.com

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