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VPN Services & Guides

Best VPN Review: Private Internet Access (PIA) Fe…

The market for Virtual Private Networks has exploded over the past few years. A wealth of new providers has appeared, promising logless browsing, true anonymity, and fast speeds. Through all that noi…

Linux - Unix

Linux BIND DNS - Part 4: Common BIND Files - Name…

So far we have covered in great detail the main files required for the firewall.cx domain. These files, which we named db.firewall.cx and db.192.168.0, define all the resouce records and hosts availa…

Palo Alto Networks

How to Manually Download, Import & Install PAN-OS…

This article provides comprehensive guidance on the manual processes involved in downloading, uploading, and installing (import) any PAN-OS version on a Palo Alto Firewall. It details the steps for s…

Web Application Vulnerability Scanners

Everything You Need to Know About SQL Injection A…

SQL Injection Attacks are one of the most popular attacks against web servers, websites and web applications. A fairly popular website can expect to receive anywhere between 80 and 250 SQL injection…

Cisco Services & Technologies

Cisco SmartCare Update - Next Generation Appliance

It's been more than a year since we introduced the Cisco SmartCare service and appliance. It's been extremely popular and has successfully penetrated the Cisco market with installations continually i…

Cisco CallManager-CCME

How To Upgrade Cisco - Linksys SPA8000 Firmware

The Cisco - Linksys SPA8000 is an 8-port IP Telephony Gateway that allows connections for up to eight analog telephones (provides 8 FXS ports) to a VoIP network using the Session Initiation Protocol…

TCP - UDP Protocol Analysis

TCP Header Anaylsis - Section 4: TCP Flag Options

As we have seen in the previous pages, some TCP segments carry data while others are simple acknowledgements for previously received data. The popular 3-way handshake utilises the SYNs and ACKs avail…

SASE & SD-WAN Networks

Key Features of a True Cloud-Native SASE Service…

Secure Access Service Edge (SASE) is an architecture widely regarded as the future of enterprise networking and security. In previous articles we talked about the benefits of a converged, cloud-deliv…

Windows Servers

Introduction To Windows Server 2012 R2 Virtualiza…

FREE Hyper-V & VMware Backup: FREE for Firewall.cx readers for a Limited Time! Download Now! Virtualization is an abstraction layer that creates separate distinct virtual environmen…

Web Application Vulnerability Scanners

Precision Web Application Vulnerability Scanning…

There are two primary approaches to web application security testing. Dynamic Application Security Testing (DAST), also called black box testing, imitates an attacker. The application is tested from…

TCP - UDP Protocol Analysis

UDP Protocol - Header

This article covers the UDP protocol. We examine the structure of the UDP header, the protocols that use UDP as a transport plus a lot more. Some common protocols which use UDP are: DNS, TFTP, ARP…

Windows Servers

Windows 2003 DHCP Server Advanced Configuration -…

Part 1 of our Windows 2003 DHCP Server Advanced Configuration article explained the creation and configuration of DHCP Scope options and how to configure various DHCP server settings. This article fo…