Part 3: Security response at a large company

By Anton Chuvakin

January 3, 2003 12:00 PM ET

Recommended

(1)

Digg

Twitter

Share/Email

Computerworld - A large company with a large IT department and a dedicated security staff is in a unique position in relation to security response. It will have more resources, including more staff and more money and can accomplish more in terms of security, but it will also have more eggs to watch, and they will be in many different baskets.
In the previous articles in this series, we looked at the differing security responses in small or home offices (see story) and at midsize companies (see story). In the third and final part of this series, we'll examine the challenge of security response in the large business environment.
As in the case of a small company, a companywide security policy is crucial to the security process. A separate incident response policy is also needed to further specify all the actions that should be taken after a security incident. The policy should define all the company's protections from various risks, including internal abuse and lawsuits. This policy also should satisfy the due diligence requirements imposed by government regulations.


	Anton Chuvakin, Ph.D., GCIA, is a senior security analyst at a major information security company. His areas of expertise include intrusion detection, Unix security, forensics and honeypots. In his spare time, he maintains his security portal www.info-secure.org.

Big and complicated
One important characteristic of large company security is its size. Having complicated perimeter defenses and thousands of internal machines on various platforms certainly doesn't add simplicity to security management. Huge amounts of security information are generated by firewalls, intrusion detection software and various access points (such as dial-up servers and VPNs) and systems on the LAN. It would be impossible to respond to all of this data.
In addition, few of the events mean anything without the proper context. For example, a single packet arriving at Port 80 of the internal machine might be from an employee within the LAN mistyping a Web address, which isn't important. Or it could be a port scan attempt within the internal network (critically important) or misconfigured hardware trying to do network discovery (of low importance).
Using automated tools to sort through all the incoming data should help to detect hidden relations between various security data streams. A simple example would be the slow "horizontal" port scan: Port 80 on IP 1.2.3.4, then Port 80 on 1.2.3.5, etc., as opposed to a "sequential" port scan with Port 80 on 1.2.3.4, then Port 81 on 1.2.3.4, etc.
A single packet arriving at the port will most likely go

Recommend Digg Twitter ShareThis

Email Print Send Feedback Reprints

Jump to comments

Security

Additional Resources

WHITE PAPER

EFD vs. HDD - What You Need to Know

Enterprise flash drives provide a new Tier 0 storage layer capable of delivering high I/O performance at a very low latency. Proper use of EFDs in an Oracle environment can deliver increased performance compared to fibre channel drives. Read the recommendations for identification of the best DB components for EFDs.

WHITE PAPER

Gartner Research Report: Magic Quadrant for Application Delivery Controllers, 2009

The market for products to improve the delivery of application software over networks remains dynamic and innovative. Vendors focused on solving enterprises' most-pressing application problems have become the top players.

WHITE PAPER

Eight Criteria for Server Load Balancing

Server load balancers are a simple yet highly effective means to scale an application environment while ensuring its availability. Today's solutions should also address application performance and security. Read about the top eight criteria you should consider when choosing a server load balancer and how Citrix NetScaler meets those requirements.

White Papers & Webcasts

Death to PST Files
Download Now

Four Ways to Improve Your TSM Environment with a SEPATON VTL
Watch Now

The Tangled Web: Silent Threats & Invisible Enemies
Download Now

Tape Killed the IT Guy
Watch Now

Forrester Consulting Mobility Study: Taking Control of Enterprise Mobile Device Diversity
Download Now

BRM: What You Can Do To Reduce Risk In Challenging Times
Watch this webcast now!

What IT Must Do to Support Employee-Owned BlackBerry, iPhone and Android Mobile Devices
Download Now

Web 2.0, Social Media and the Dark Web - A Web Criminals Paradise?
In this discussion, learn about the challenges of protecting your users from the potentially unsafe content hidden in the "Dark Web".

eGuide: Enterprise Security
Smart Security Strategies for 2010. Read now!

Disaster Recovery 2008: Reduced Costs and Improved Performance
How long can your Enterprise afford to be without your data? With an accelerated disaster recovery program, you never have to answer this...

All White Papers | All Webcasts