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ASP.NET 4.0 fixes some long-term omissions and bugs and looks likely to continue to be a popular method of developing web applications. Alternative approaches such as ASP.NET MVC ( 13) are gaining ground (due in part to their easy testability), so it will be interesting to see if this remains the case in years to come.

If you are going to use syslogd for remote logging, then you have a couple of ways to make your installation more secure. The most obvious threat to syslogd daemons are DoS attacks in which your system is flooded with messages that could completely fill your disks. If your logs are located in the root partition, your system can potentially crash. To reduce the risk of this potential crash, I recommend you store your logs on a nonroot partition. This means that even if all the space on your disk is consumed, the system will not crash. The second way to secure your syslogd for remote logging is to ensure your firewall rules allow connections only from those systems that will be sending their logging data to you. Do not open your syslog daemon to all incoming traffic!

Syslog and syslogd are useful tools; however, not only are they dated, but they also have limitations in the areas of reliability and security that do not make them the ideal tools to use in a hardened environment. A worthy successor to syslog is syslog-NG. Developed to overcome the limitations of syslog, it represents a new-generation look at logging with an emphasis on availability and flexibility and considerably more regard for security. Additionally, syslog-NG allows for more sophisticated message filtering, manipulation, and interaction. syslog-NG is freeware developed by Balazs Scheidler and is available from http://www.balabit.com/products/syslog_ng/.

s Note syslog-NG goes through a lot of active development, and new features are added all the time. With

Visual Studio 2010 includes a new version of the Microsoft AJAX libraries that can be used in any web application. When working with the Microsoft AJAX library, many developers believe that it consists of little more than the UpdatePanel, which is a shame because it offers so much more. Many developers also believe that the Microsoft AJAX libraries can be utilized only in ASP.NET applications. They would be wrong; the Microsoft AJAX library is (mostly) just plain ol JavaScript files and can be utilized in any web application ASP.NET, PHP, Ruby, or anything else you can think of. Although some functionality doesn t make much sense outside of the ASP.NET platform, it s a tiny part of the libraries. This release introduces a new mechanism for loading scripts, easy-to-use client side data binding, and integration with jQuery. Existing users also benefit from refactoring and performance enhancements. The libraries will soon be put to the test in the upcoming NASA community web site and MSN Messenger web toolkit.

the active development cycle of the product, sometimes the documentation becomes out-of-date. If you want to keep up with all the activity and need help for something that is not explained in the documentation, then I recommend you subscribe to the syslog-NG mailing list at https://lists.balabit.hu/mailman/ listinfo/syslog-ng. syslog-NG s author, Balazs Scheidler, is a regular and helpful participant on the list. As a result of this busy development cycle, I also recommend you use the most recent stable release of libol and syslog-NG to get the most out of the package.

The following sections cover installing and compiling syslog-NG and then configuring it as a replacement for syslog. I will also cover configuring syslog-NG to allow you to store and query log messages in a database. Finally, I will cover secure syslog-NG logging in a distributed environment.

sJAMES TURNBULL is an IT&T security consultant at the Commonwealth Bank of Australia. He is an experienced infrastructure architect with a background in Linux/Unix, AS/400, Windows, and storage systems. He has been involved in security consulting, infrastructure security design, SLA and support services design, and business application support.

CAUTION This chapter was written with the beta version of Microsoft AJAX library, so functionality might differ come final release. You have been warned.

sJUDITH MYERSON is a systems architect and engineer. Areas of interest include middleware technologies, enterprise-wide systems, database technologies, application development, server/network management, security, firewall technologies, and project management.

ark Chandler, for his friendship and technical assistance during the writing of this book. Nate Campi, for providing syslog-NG, SEC, and logging information.