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What is OpenVAS? OpenVAS (Open Vulnerability Assessment System) is a comprehensive vulnerability scanner and security assessment tool. It’s part of Greenbone Security Manager and performs network security testing by scanning systems for thousands of known vulnerabilities and misconfigurations. The tool uses a regularly updated feed of Network Vulnerability Tests (NVTs) to detect security issues, provides detailed reports, and can be managed through a web interface. OpenVAS is popular among security professionals and system administrators because it’s open-source and offers capabilities similar to commercial vulnerability scanners. ...

What are ACLs? ACL (Access Control List) is a technology that allows administrators to control access to the network by filtering packets based on source/destination IP, layer 4 ports, etc. This is set on the interface either inbound or outbound. The list is processed from top to bottom. So if you have a list that goes 2,3,1, the order of processing would be 2 then 3 then 1. Types of ACL There are two types: extended and standard. The difference is that standard ACLs are only based on source IP address, but extended ACLs are based on source/destination IP addresses or port numbers. Standard ACLs can only use numbers 1-99 or 1300-1999. ...

What is OSPF? OSPF (Open Shortest Path First) is a routing protocol that automatically finds the best route to a network. It is technically a link-state protocol, which means each router in a network has a map of the network. The reason you use OSPF is that in a network with multiple routers, you would normally have to configure a route to each network on every router. This doesn’t sound too bad if you only have 2 or 3 routers, but what if you have 10, and the network changes frequently? This would take forever to maintain manually. OSPF does it automatically for you. ...

Creating a Seamless Windows VM Experience on Arch Linux with GPU Passthrough Virtualization on Linux has become incredibly powerful, allowing users to run a Windows virtual machine (VM) with near-native performance using GPU passthrough. This guide will walk you through setting up an Arch Linux environment with libvirt, configuring a Windows 11 VM, and optimizing it with GPU passthrough for a seamless experience. For optimal results, this setup utilizes two GPUs, which offers a smoother user experience by dedicating one GPU to the host and another to the VM. Key Components ...

What is DHCP? Dynamic Host Configuration Protocol (DHCP) is a network management protocol used to automatically assign IP addresses, subnet masks, DNS servers, and other network configurations to devices. Instead of manually entering this information for each device, DHCP takes care of it for all devices on the network, streamlining network administration. What You Will Need Two domain-connected Windows servers (I’m using Windows Server 2022, but you can use any supported version). The DHCP server role installed on each server. What to Do Set Up a Scope on the Primary DHCP Server: ...