steprofit.com


 
 

< HOMEPAGE

Detecting and Eliminating Computer Viruses at the Gateway

Traditional anti-virus software only stops known computer viruses – stopping undefined computer viruses requires a different approach.

In the past, network administrators scrambled to apply new virus signatures whenever new computer viruses were discovered. While these signatures will stop a known threat, it takes time for anti-virus vendors to develop them. Unfortunately, the newest and most damaging viruses are able to spread so quickly that the damage is done before a signature can be developed and distributed.

In fact, the independent testing laboratory AV-test.org found the response times for major anti-virus software publishers to range from just under 7 hours to almost 30 hours , with the four leading vendors (Sophos, McAfee, Symantec and Trend Micro) clocking in at no less than 12 hours.

In January 2004, the computer virus known as “MyDoom” created mass disruption to corporate resources and reputations as it quickly spread through e-mail networks worldwide. At its peak, MyDoom infected one in every five e-mails transmitted over the Internet. The worm broke records set by previous malware, such as Sobig.F, to become the fastest-spreading virus ever. This incredible propagation speed left many networks vulnerable - despite the presence of anti-virus software - because of the lag time between when the virus outbreak began, and when a virus definition became available.

As a result of recent malware threats, corporations and organizations have learned a painful but important lesson: simply deploying a signature-based solution is no longer enough. Detecting and eliminating computer viruses requires a multi-faceted, rapid-response approach that traditional anti-virus protection cannot provide. Even a single unprotected computer on an enterprise network can bring down the entire system in just minutes, rendering even the most expensive and up-to-date software useless.

Why E-Mail is Particularly Susceptible

In many organizations, e-mail has replaced the telephone as the most useful business tool available. Unfortunately, e-mail has also been a victim of its own success and presents a unique threat to the enterprise network as a whole.

Detecting and eliminating threats has traditionally been the combined responsibility of firewalls, virus scanners, and intrusion detection systems (IDS) set up by enterprises to defend against attacks. Firewalls prevent unauthorized programs from accessing the network, virus scanners scan each PC in the network for malicious code, and gateway servers lock down extraneous ports to protect against unauthorized access.

But key Internet-facing applications, including e-mail are unguarded by firewalls. In order to function, e-mail must expose firewall ports, including port 25, the port used by SMTP (Simple Mail Transfer Protocol) and port 110, the port used by POP (Post Office Protocol).

When a firewall receives a connection on port 25, it generally assumes that the transmission is e-mail and allows it to flow through to the e-mail server. The transmission may very well be a valid e-mail; however, it could also be a virus, spam or something much worse. Firewalls are not able to distinguish between “good” mail and “bad” mail and therefore they are unable ot protect the e-mail application.

Stop E-Mail Threats at the Gateway

Therefore, some sort of protection is needed specifically for e-mail and, since the best place to stop a threat is before it gets inside the network, the protection should be at the e-mail gateway. Protecting the e-mail gateway requires a coordinated effort to combat a host of issues, including spam, viruses, corporate policy infringements, directory harvest attacks, denial of service attacks, phishing, spoofing, and snooping. As e-mail threats evolve, the distinction between each of these types of threats becomes blurred.

Furthermore, accuracy in identifying “bad” e-mails is crucial. Extreme care must be taken to avoid filtering out legitimate e-mails (false positives), which could contain important information from customers or partners.

Historically, enterprises have turned to multiple vendors to solve their e-mail security issues. They have relied on anti-virus vendors to protect them from viruses. They use a separate anti-spam vendor to help cut back on the spam. Then, there are the issues of content filtering, policy enforcement, encryption, and network security. Unfortunatley, attackers are now highly adept at exploiting these non-integrated solutions. This “Swiss cheese” defense has not only been costly, but increasingly ineffective at protecting corporate email systems.

Computer Virus Risks

Recent attacks from various types of computer viruses and worms have had profound effects on computer systems around the world. Enterprises have been brought to their knees and forced to spend billions of dollars cleaning up the mess and rebuilding their infrastructures. While the increased IT costs are clear, there are other risks corporations face with regard to e-mail borne viruses.

System Downtime

E-mail has evolved to be the primary communication tool for most organizations and the loss of e-mail due to attack can severely affect enterprise operations. Beyond the immediate expenses involved in restoring the network, an attack on your enterprise e-mail system can also result in lost hours and days for employees who have come to rely on it to accomplish their daily tasks.

Resource Depletion

The costs of cleaning up after an attack are significant. IT teams are forced to spend considerable time and money repairing virus damage. The damage, however, is rarely contained to network servers. Once inside the network, viruses can quickly infect large numbers of relatively exposed client machines - all of which must be individually cleaned, patched and repaired.

Administration

In the past, when a new vulnerability was discovered, network administrators scrambled to apply security patches from the makers of their anti-virus software and manually reviewed quarantine lists for virus-infected messages. Software manufacturers release patches so frequently that network administrators cannot reasonably be expected to keep up with them all. As stated by Gartner Research, “Enterprises will never be able to patch quickly enough. After all, attackers have nothing else to do.” The staggering damage caused by recent computer viruses and malware attacks is clear evidence that manual intervention to institute emergency measures or review quarantined messages is rarely effective against rapidly propagating threats.

Compliance and Liability

Recent Federal regulations such as the Health Insurance Portability and Accountability Act (HIPAA), Gramm-Leach-Bliley Act (GLBA) and Sarbanes-Oxley Act (SoX), require enterprises to protect data residing in mail servers and other internal systems. Security breaches violate these regulations, exposing sensitive data and opening the door to serious sanctions and costly litigation.

Credibility

Falling victim to a virus attack can also result in lost trust from business partners and customers. According to Gartner, “Enterprises that spread viruses, worms, spam and denial-of-service attacks will find not only that malicious software can hinder their profitability, but also that other businesses will disconnect from them if they are considered to be risky.” While an attack may not be your fault, it is most certainly your problem.

The Solution

Although signature-based anti-virus systems are inadequate to preventing virus attacks in the first few hours or days of an outbreak, it is possible to identify outbreaks before they infiltrate your organization’s network and become a problem. In fact, doing so successfully requires tight integration of several different technologies designed to analyze mail based on many different characteristics. One of the most innovative and important technologies for meeting these threats is known as Anomaly Detection.

Large-scale virus outbreaks create anomalies in mail flow which are identifiable by the message content, source, volume, attachment or any of a number of other indicators. When a particular message appears to be a part of a sudden surge of anomalous messages moving across the internet, the message can be quarantined until virus definitions can be developed to address the new threat.

Anomaly Detection

CipherTrust’s IronMail utilizes a unique Anomaly Detection Engine (ADE), which dynamically identifies and responds to abnormal behavior in mail flow. By monitoring “normal” e-mail traffic rates across the Internet, the ADE allows IronMail to identify spikes in traffic that are often the first signal of a malicious attack. Once these spikes are recognized, IronMail units take appropriate action to prevent infiltration of the network.


About the Author

CipherTrust is the leader in anti-spam and email security. Learn more by downloading our free whitepaper, “Next Generation Virus Protection: An Overview of IronMail Zero Day Virus Protection” or by visiting http://www.ciphertrust.com>www.ciphertrust.com.

Written by: CipherTrust

NAVIGATION

10 Easy Steps to Speed Up Your Computer Without Upgrading

10 Power Tips for Presentations with Computer Projection

10 PROVEN TIPS TO SURVIVE A COMPUTER CRASH

10 Secrets To A Healthy Computer And A Happier You

10 Tips on Computer Clutter Clean Up

14 Household Ways To Protect Your Computer From Viruses

3 Simple Ways To Save A Bunch Of Money When Buying A New Computer

3 Summer Computer Tips

30 Secrets Of A Good Computer Lesson

4 Computer Money saving Tips

5 Critical Steps to Protecting Your Computer on the Internet

5 Simple Ways To Increase Your Computer Speed

5 Stress Reducing Computer Tips

5 Sure Fire Tips for Buying a New Computer

5 Tips For Buying The Right Laptop Computer

5 Tips to Color Code Your Way from Computer Chaos to Coherence

5 Ways To Make Night And Weekend Computer Life Rich

5th generation Computers Corporate infrastructure

6 Essential Steps to Protect Your Computer On the Internet For Free

6 tips for Keeping Aurora Away from your computer and 1 tip to Fix it if Aurora has Gotten You

7 Barebones Computer Buying Tips

A Guide to Computer Desks

A Hacker Inside Your Computer

A Look at Computer Desks for Children

Advancement in Computer Technology

Adware Are Your Business s Computers Secure

All About Computer Viruses

An eBay Computer Purchase

Are cyber criminals phishing your identity from your computer

Are You At The Mercy Of Computer Geeks

Are You Being Mislead By Your Current Computer Dealer

Are You Making Any Money With Your Computer Yet

Are You Saving Money With a Computer Support Plan

Avoiding Spam Scams and Computer Viruses

Back that Thang UP Insure the Data on Your Computer

Basic Computer Thermodynamics

Be Prepared in the Event Computer Disaster Strikes

Beat The Bugs Helpful Links That May Help You Combat Annoying Computer Viruses

Becoming a Computer Trainer

Beeps Your computer is telling you something

Broadcasting Mp3 Audio Via Computer The Looney Tune World Of Podcasting

Build your first computer from hardware scratches

Build Your Own Computer

Build Your Own Computer or Buy

Build Your Own Computer What to Look for in a Case

Buy a home through your home computer

Buying a computer Ask these 3 questions

Buying a Used Laptop Computer

Buying computers at a discount with peace of mind

Buying DDR memory for your computer

Buying Guide for Laptops Personal Computers Notebooks

Buying the Perfect Computer The FIRST Time

Career Track Computer Programmer

Career Track Computer Software Engineers

Choosing a Laptop Computer Based on Hardware and Software Needs

Classification of Computers

Combat Computer Spyware An AntiSpyware Program Isn t Enough

Computer Aided Design Contracting Tax Concerns In The UK

COMPUTER BACKUPS

Computer Business Opportunity Provide Huge Profit Potential

Computer Buying Advice For Novices

Computer Career

Computer Case Modding

Computer Cases The Basics

Computer Certification Anticipation vs Nervousness

Computer Certification Become A Utility Player

Computer Cleaning

Computer Cleaning May Be The Best Home Based Part time or Full time Business

Computer Components for Idiots

Computer Consulting 101 Hiring Tips Part 1 of 2

Computer Consulting Profit Secrets

Computer Controlled LED Signs

COMPUTER COURTESY

Computer Data Backup Data Backup Solution Will Give You A Peace Of Mind

Computer Data Backups Test Now or Cry Later

Computer Data Recovery Options

Computer Disposal Throwing Away Your Computer Money and Idenity

Computer Do s and Don ts

Computer Equipment Disposals and Recycling

Computer Geeks and Garden Gnomes

Computer Graphics They re Not All The Same

Computer Hacks Quacks Looking for Cracks

Computer Hardware Preventive Maintenance Software

Computer Help Desk Stupid Questions brought to you by Computer Service Now CSN

Computer Homeschooling the added advantage in african american children s education Part 1

Computer Hygiene Take Out The Trash

Computer In The Shop What Do You Do Now

Computer Insurance

Computer Loans An opportunity to have a computer of your own

Computer Loans Become Techno Savvy the Easier Way

Computer Maintenance and Improving PC Performance

Computer Monitor Buying Guide

Computer Network Designing

Computer Network Installation

Computer Profits From Home What s Right for You

Computer Rental Worth Your Money

Computer Rentals The Best Classroom Computer Training Solution

Computer Running Slow Here s One Reason

Computer Security What Exactly Is It

Computer software Excellent prices

Computer Software Genres That Help Students Think

Computer SOS Inc Release of Upgraded League Management Software Package

Computer Support London Network Support London Network Installation London

Computer Tips that Help Small Businesses Operate Profitably

Computer Traumas

COMPUTER VIRUS THREATENS MY HOME BUSINESS

Computer Virus Writer s A Few Bats In The Belfry

Computer Viruses are Bad Luck

Computer Viruses Worms and Hoaxes

Computers and Internet Inspiring Us to Create

Computers and Web Cams are Taking Communication to Levels Only Imagined in Sci Fi Novels

Computers Are Not Scary

Computers are Running My Life

Computers Freedom and Privacy

Computers Introverts and the Information Age

Computers You CAN Master Any Program

Coping with a Serious Data Loss from your Computer Hard Drive

Corporate infrastructure for Fifth generation Computers

Corporate Promotional Gifts The Fridge Magnet Is Dead Long Live the Computer Desktop

Countering the Spread of Spyware on your Computer

D BUST Your Computer Part 1 Instructions for Microsoft Users

D BUST Your Computer Part 2 for Microsoft users

D BUST Your Computer Part 3 for Microsoft users

D BUST Your Computer Part 4 a for Microsoft users

D BUST Your Computer Part 4 b

D BUST Your Computer Part 4 c

D BUST Your Computer Part 4 d

D BUST Your Computer Part 5

Definitions for Computer Modding and Form Factor

Dell Computer Corporation Recall of Latitude Inspiron Laptop AC Adapters

Did You Ever Want to Completely Erase Everything on Your Computer

Different Categories of Computer Games

Dirty Little Computer Viruses and How To Protect Yourself

Distance Learning and Elearning for Computer Techs

Do The Media Spread Computer Viruses

Do You Feel Used by Computers

Do You Know How To Remove Spyware From Your Computer

Do you know who is snooping around your computer right now

Do you need computer training

Dual core computer processors luxury or necessity

Dusting Your Computer Keeping it Cool

Expansion Slots Cards and Bays Choosing the right computer case

Extending the Life of Your Business or Personal Computer Printer

Finally An Understandable Introduction To Computers

Five Simple Steps to Speed up Your Computer

Focus On White Collar Crime Accounting Fraud and Computer Crimes Creates Need For Qualified Investigators

Gaming Computers and Computer Modding

Get Ahead When You Build Your Own Computer

Get Started in Computer Game Creation

Get Valuable Computer Based Training Online FREE

Getting Started In Information Technology Computer Consulting

Good News Bad News of Computer Security from a Keen Non Techie

Guide on How to Land Computer Jobs

Hackers Given Access to IRS Computers

Hardware for Computer Desks

Have You Invited A Spy Into Your Computer

Healthy Webmasters Choose Ergonomic Computer Products

Heliodisplay Computer Video With No Screen

Help Keep the Computers on Earth Clean and Healthy

Help Keep The Computers On Earth Clean And Healthy Protect Your Techno Friends From Viruses And Sickness

Help My Computer s Being Invaded

Help There s an Intruder in my Computer

Hidden information is stored on your computer about every url you ever visit

Home Computer Desks A Variety of Options

Home Office Tip 2 Computer Health Hazards

How a Computer Consulting Business Can Help Your Company

How Much Money would it cost you to regain the use of your computer after a serious virus infection

How Protected are You Safeguard Your Small Business from Computer Viruses

How Safe is Your Critical Business Data on Your Computer System

How Spyware Blaster Can Protect Your Computer From Harm

How to backup your computer data

How to Backup Your Computer Files

How to Become a Computer Consultant

How To Buy The Right Computer

How to choose a new hard drive for your computer

How to choose your computer

How To Deal With Computer Problems

How to Get a FREE Computer Scale Printer from DHL

HOW TO GET THE COMPUTER YOU WANT WITHOUT SPENDING A FORTUNE

How to Have Your Computer Cake and Keep Your Family Too

How To Keep Your Computer Virus Free

How To Optimize Your Online Time Through Efficient Computer Use

How to Prevent Computer Security Risk and How to Keep Your Small Business Safe

How To Prevent Spyware Attacking Your Computer

How To Recognize If Your Computer Has A Virus Or Trojan On It

How to reduce Computer problems

How to safeguard your computer

How To Save Big Bucks On A Laptop Computer

How To Stop The 1 Cause Of Computer Slow Downs And Crashes

How To Take Care Of Your Laptop Computer

How To Take Good Care Of Your Computer Even If You Are A Clueless Newbie

How To Work At Home Using Your Computer Even If You Can t Type

How Viruses and Spyware Get In to your computer

HR MANAGERS USE COMPUTER FORENSICS TO INVESTIGATE EMPLOYEE ALLEGATIONS

Hurricanes Wilma Katrina And Rita Force Businesses To Rethink Computer

I Spy Something Terribly Wrong In Your Computer

If You Had Problems in the Past with a Computer Virus Then You ll Want to Know How Easy it is to Setup Firewall Protection

Image conversion In Computers

Important Steps to Protect your Computer from Hurricanes

In Computer Memory what is CAS Latency

Is DVD Storage An Attractive Alternative For Your Computer Backup

Is Spyware Slowing Your Computer Down To A Crawl

Is your Computer a friend or a Dirty Name

Is your Computer Infected with Spyware

Is Your Computer Sick

Is Your Computer Slow and Sluggish Take These Steps To Speed It Up

Is Your Computer Strong Enough For A work From Home Internet Business

Jobs Online How To Get Your Computer to Work For YOU

Keep A Diary Of Your Computer

Keep Computer Training Simple Please

Keeping your Computer Spyware Free for Free

Laptop Computer Extras for the Mobile Traveler

Laptop Computers and the PVP Effect

LCD Touch Screen Computer Monitor

Learn How To Hide Files and Folders On Your Computer

Learning Math and Dosage Calculations Using a Computer Program

Local Company gains Four Nominations in Computer Trade Oscars

Make a place for computers in children s world

make alot of mney using ur computer

Make your computer read selected text from any application with a single keystroke

Make Your Fortune in Computer Services

Make your own Computer Software without Programming

MCSE CCNA How To Choose A Computer Certification

More Computer Consulting 101 Hiring Tips Part 2 of 2

My Computer is Making a Strange Noise

My dad listens to music all day on his computer

Newbie Of course you can make money working from home on your computer

No Computer Sound

Notebook or Desktop Computer Which Should You Choose

One Way to Solve Memory Problems with your Computer

Optimize Your Computer For Peak Performance

Organization Tips How to Organise Your Computer Files

Organizing Your Desktop Computer Desktop That Is

Paranoia or Are Public Internet Computers Dangerous

Performance Computer Chips For Cars And Trucks

physical topology of a network refers to the configuration of cables computers

Preventing Malicious Spyware or Adware from Hijacking Your Computer

Protect and Secure Your Computer Life

Protect Your Computer

Protect your Computer and Internet Privacy

Protect Your Computer and Your Business

Protect Your Computer And Your Personal Information From Spyware

Protect Your Computer System With A Comprehensive Security Policy

Protecting Your Computer from Adware and Spyware

Quick Guide to Computer Training

Rackmount Computer Keyboards

Rackmount Computer Monitors Provide Dependability

Read Chinese Online How To Configure Your Computer To Display Chinese Characters

Real Estate Records In The Computer Age

Refurbished Computers on the Internet

Reinstall Windows XP On Your Computer

Removing Bargain Buddy Adware from your Computer

Reviving Old Computer Games

Secrets to SpyProofing Your Computer In Four Easy Steps

Secure Your Data Windows Data Backup Computer Software

Securing your Computer to Keep Up with Internet Threats

Security necessities to prevent your computer from Spyware

See How To Revive A Dead Computer

Setting up Your New Computer How To Move Your Old Files to Your New Computer

Should You Buy A Cheap Computer Desk

Some Computer Forensics Basics

Speed Up Your Computer Inner cleansing tips for your pc

Spyware Protection A Must for Any Home Computer

Starting A Home Computer Business Is Still Smart

Success at Work Techniques Computer Literacy

Survival Without Computers

Ten Great Careers For Computer Geeks

The ABCs Of Computer Memory

The Benifits of Assembling Your Own Computer

The Charm of an Oak Computer Desk

The Complete Guide To Spotting Computer Spies Recording Devices

The Computer Friendly Resume

The computer virus that could take advantage of you

The Cost of Spyware on your Computer

The Evolution of Technology The History of Computers

The Flexibility of Roll Top Computer Desks

The Future Of Computer Certification Exams

The Great Underutilized Computer

The Hidden Benefit Of Computer Certifications

The History Of Laptop Computers

The Need for Rackmount Computer Cases

The Newbie s Guide to Personal Computer Maintenance

The Secret Computer Virus That is Virtually Undetectable

The Single Least Expensive Yet Most Valuable Way to Upgrade Your Computer s Performance

The Top Twelve Threats No Computer User Should Ignore by Kai Chandler

The Trials and Tribulations of A Confused Computer

The Trials and Tribulations Of Learning A New Computer Skill

Thinking about earning your computer degree online

Three Things You Can Do to Keep Your Computer Running at Maximum Performance

Tips for Buying a First Computer

Tips For Finding Great Deals On Computer Accessories Supplies

Tips For the Late Blooming Computer User

Top 10 things everyone must know about computer viruses

Top 10 Ways to Protect Yourself from Computer Viruses

Transfer The Digital Camera Images To Your Computer

Twelve Things You Should Know to Save on Computer Software

Twelve Threats No Computer User Should Ignore

Types of computer infections

Ultimate Checklist On How To Revive A Dead Computer

Understanding Computer Memory

Understanding the Software Layers of a Computer

Unleash The Dragon Inside Your Computer

Update your computer system with bad credit computer financing

Use Internet Resources To Get Rid Of Computer Viruses

Use Your Computer For Your Entertainment Needs

User Friendliness Do Computers Have to be Clinical and Boring

WARNING Do not buy a computer until you read this

Watch Out For eBay Automobile And Computer Scams

Watch out for spyware programs that slow down your computer system

Watch Out For Spyware Programs That Slows Down Your Computer System

What are Rackmount Computers

What is a Protocol the communications between computers on a network

What Is Computer Programming Anyway

WHAT IS SPYWARE AND HOW DO I REMOVE IT FROM MY COMPUTER

What Paper or Computer Files Should You Keep

What s in a Computer Name

What to look for in a Computer Classroom Rental

When to rent a laptop computer

Which Notebook Computer Has Your Name On It

Who s Peering Into Your Computer

Why Build Your Own Gaming Computer

WHY CONSULTANTS DON T TELL ABOUT COMPUTER SECURITY

Why Do I Need Anti Virus Software For My Computer

Why More Women Should Consider a Career in Computer Programming

Wireless The new trend in Computer Rentals and Projector Rentals

Work A Home Computer Jobs Are Plentiful

Work At Home Computer Jobs Can Give You Freedom

Work From Home Using Computer

You Can Stop Computer Viruses

You Voice On Your Own Computer

Your Affiliate Business Peripherals Software Computers

Your Computer Can t Keep Time

Your Computer May Be Infected Here s how to check

Your Computer May Be Infected Here s How To Check NOT about virus

YOUR PRIVACY EXPOSED Computer Forensics International uncovers secrets about recycled hard drives

Zen and the Art of Buying Computer Parts

© steprofit.com - All Rights Reserved