Linglom’s Blog

Introduction

Nessus vulnerability scanner is a tool which can discover and analyze vulnerabilities in the system so that IT staff can fix that holes and hence the system becomes more secure. Before scanning the system, it is necessary to update Nessus’s plugins to make sure that it’s up-to-date and will able to detect the latest vulnerabilities. If you have a disconnected network from the Internet, you need to update the Nessus’s plugins manually.

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Introduction

Have you ever concern about security of your data? What if someone stolen your storage device or laptop which you have some privacy information on there? Or you have some private data that keep on a PC or laptop and don’t want other to access them.

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If you have anti-virus installed on your PC and wonder whether your anti-virus is working or not. What would you do to test the anti-virus software? Ask a programmer to write a virus to destroy your PC? No, you wouldn’t want any harm on your PC, just only want to test the anti-virus software. Fortunately, there is a test file that you can create by yourself to test your anti-virus without causing any damage to your PC. The file was provided by EICAR, which stands for European Institute for Computer Antivirus Research, called the EICAR test file.

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Introduction

By default, Microsoft Internet Security & Acceleation Server (ISA) will block any connection between internal and external network. If you have Symantec AntiVirus and it needs to update definition (or signature) from internet through ISA, The ISA will block the connection so that the program can’t update the definition.

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Have you ever need to block users using MSN or Yahoo Messenger? Or block them to using free email services? Or even block them to post anythings on web boards? Or block them to using bittorrent to download files? This topic can answer these questions by using Microsoft ISA Server 2006.

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Introduction

After completed part III, you have done basic configurations on ISA Server. In this part, you’re going to configure on client computer to be one of these types: SecureNAT Client, Firewall Client or Web Proxy Client. You can see more detail in topic below.

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Firewall Policy

From part II, you have configured Network Topology. Now you need to create a policy rule to allow traffic pass through the ISA Server.

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Network Topology

From Part I, you have finished install ISA Server 2006. Before using the server, you need to do some configurations first. On Getting Started with ISA Server 2006 page on ISA Server Management, there are 5 steps for set up ISA Server as the figure below.

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