Useful security tools/utilities for System administrators

I have collected a number of useful tools for keeping a network secure. Note that this list is in no way exhaustive. Some of the tools are difficult to find, so you can download them right of this page. Please do not send any email asking support for these tools. For questions, please use the forums. PLEASE NOTE, I am NOT RESPONSIBLE FOR WHAT YOU DO WITH THESE FILES…

The Netbus trojan

This article gives background information on the various Netbus trojan versions, what they can do and how you can remove them from your system. It also allows you to download the program in order to analyse what it does.

Microsoft ISA Server, Part I – introduction, installation, configuration, Web caching and Internet access

Microsoft is trying to present itself as not only the worldwide leading manufacturer of operating systems but also as a top provider of comprehensive IT solutions for business. With its Microsoft Internet Security & Acceleration Server, the Redmond software giant is approaching this goal. This is Part I of a series of articles on ISA Server: its origin, complexity, benefits and shortcomings.

Port Scanning ISA Server

When I wrote my series on how to secure your ISA Server installation, I had it in mind that ISA Server administrators could use the information to confirm whether or not their ISA Server installations we’re secure. We got some good feedback on the series, but you wanted more! Specifically, you wanted to know how you could test (via port scanning tools) what ports and services were visible and available on the external interface of the ISA server.

VPN Client Security Issues

You've implemented a ISA/VPN Server to allow secure remote connections to your internal network. While you might have configured your VPN Server in a secure manner, what about your VPN clients? In this article I'll talk about important issues regarding VPN client configuration and how it impacts network security.

Configuring Gateway to Gateway L2TP/IPSec VPNs Part 1: Configuring the Infrastructure

Configuring a gateway to gateway VPN is easy using ISA Server. The reason why it’s so easy is that the Local and Remote VPN Wizards make the setup a virtual no-brainer. Well, it’s a no-brainer when you’re configuring PPTP VPN gateways. But if you’re in the market for a high security L2TP/IPSec gateway to gateway VPN, you probably have either been trying to avoid it like the plague or you are pulling your hair out trying to figure out how to make it work!

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