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Last Updated December 10, 2003

ISA Server
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Securing ISA Server
Where to Start

ISA Server Security Checklist - Part 1: Securing the Operating System and the Interface
ISA Server is all about security. ISA is about securing network access into and out of the internal network. But after you©ve done all of your configuring, how do you know that you©ve done an adequate job of securing the internal network and the system that ISA Server is running on? Source: ISAServer.org

ISA Server Security Checklist - Part 2 Securing the ISA Server Configuration
In part one of our ISA Server Security checklist series, we talked about how to secure the operating system and network interfaces on the ISA Server. In part 2 we'll focus on ISA Server specific configuration issues that you can use to optimize security. Source: ISAServer.org

NSA Windows 2000 Security Recommendation Guides 
Guide to the secure configuration and administration of Microsoft ISA Server

 

Additional Articles

Configuring alerts to notify the administrator through email
As part of monitoring, it is vital that you get alerted when there is an intrusion or an attack taking place on your network. ISA has methods of identifying when an attack is attempted or taking place on your network. ISA Server compares network traffic and log entries to well-known attack methods that are used by hackers. ISA also has the capability of taking actions when these attacks are taking place. 
Source: ISAServer.org

Configuring authentication methods for ISA
It is important to have some sort of authentication method when using clients to access a resource through ISA, not doing so could result in unauthorized access to resources in or outside of your network. ISA has various methods of authenticating clients, I have discussed this in a previous tutorial (Understanding ISA©s different Authentication types). I will tutor you on how to configure various authentication types best suited for your ISA server. While showing you in five easy steps, how to configure the various authentication types, I will not go into too much detail on each authentication type. For more comprehensive on authentication types information please refer to my previous tutorial (Understanding ISA©s different Authentication types).
Source: ISAServer.org

Configuring Firewall Chains
A chain configuration has a number of potentially helpful and cost saving possibilities. The following steps outline how this process works. Source: ISAServer.org

Configuring ISA Server For Inbound VPN 
Virtually any computer that is able to act as a PPTP or L2TP/IPSec client can connect to your network through the ISA Server. However, everything has to be set up right in order to make this work. Source: ISAServer.org

Configuring Intrusion Detection
This article focuses attention on the built-in set of Intrusion Detection mechanisms in ISA Server. Source: ISAServer.org

Creating an Alert for Intrusion Detection
Covers the 8 steps involved in creating an Alert for Intrusion Detection. Source: ISAServer.org

Creating a packet filter for dropping ICMP Packets
How to create a packet filter for dropping ICMP Packets (Ping Requests). Source: ISAServer.org

Creating a Poor Man©s DMZ Part 1 - Using TCP/IP Security
A common issue that pops up on the www.isaserver.org web boards is how to configure a DMZ segment on a trihomed ISA Server. Setting up a trihomed ISA Server with a directly attached segment acting as a DMZ is fairly simple.  Source: ISAServer.org

Configuring VPN Access in a Back to Back ISA Server Environment
VPNs have been a topic of growing interest for the last couple years. However, since the tragic events in New York City in September of 2001, the subject has become red-hot. Why? Business and network managers now have a greater awareness that the weakest link in any design, whether it be a network or a business, is too high a level of centralization. Distributed systems are highly fault tolerant and difficult to bring down, while centralized systems can be brought to their knees with a single blow.
Source: ISAServer.org

Denying access to a specific webpage(s) using Site and Content rules
This tutorial will show you how to deny access to a specific website using Site and content rules. Source: ISAServer.org

How to Block Dangerous Instant Messengers Using ISA Server
I get a lot of questions about how can ISA Server be used to block dangerous applications. What is a dangerous application?
Source: ISAServer.org

How to Set Up Internet Security and Acceleration Server to Host Web Sites by Using the Secure Sockets Layer Protocol 
Microsoft Knowledge Base Article: 292569 - This article describes the steps to set up Internet Security and Acceleration (ISA) Server to host Web sites by using the Secure Sockets Layer (SSL) protocol. 

Preventing Code Red
Here is the list of best practices to prevent the current Code Red versions from spreading into your network, and also to prevent Code Red from spreading outside of your network if one of your internal machines has been. Source: ISAServer.org

Preventing SecureNAT and Firewall Clients from Bypassing the Web Proxy Service 
This article covers the steps involved in preventing SecureNAT and firewall clients from bypassing the web proxy service. Source: ISAServer.org

Regulating Access to websites using Schedules and Site and content rules
In this tutorial I will show how to regulate access to a specific website during specific hours using site and content rules leveraging on schedules. Source: ISAServer.org

Understanding SSL bridging and tunneling within ISA
In this tutorial I will explain ISA©s SSL (Secure Socket Layer) bridging capabilities and features to give you a better understanding of this feature so that you can use it to strengthen your ISA infrastructure within your Networking environment.
Source: ISAServer.org

Using ISA to block specific domain names from emailing your organization
In this tutorial I will cover how to use ISA to block specific domains from being able to mail people within your organization. All of us hate spam even after the initial hype of all the fancy chain letters and promotional goods after a while it gets a bit much. Many users within the organization get spam and get very frustrated when receiving spam. Source: ISAServer.org

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. 
Source: ISAServer.org

 

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