Separating the wheat from the chaff

Winnowing

Article from Issue 136/2012
Author(s):

Attackers impose a high price on your limited resources. We look at some ways to separate the good from the bad.

As you may have noticed, spam, web-based attacks, and denial-of-service (DoS) attacks have gotten rather bad over the past few years. Currently, spam makes up about 90% of email messages; in other words, for every legitimate email you get, your server has to handle around nine spam messages. For online retailers, the stakes can be much higher. DoS attacks at the height of the shopping season can have a hugely negative impact. So, what can you do to deal with these problems?

Buy this article as PDF

Express-Checkout as PDF
Price $2.95
(incl. VAT)

Buy Linux Magazine

SINGLE ISSUES
Print Issues
Digital Issues
 
SUBSCRIPTIONS
Print Subs
Digisubs
 
TABLET & SMARTPHONE APPS
Get it on Google Play

US / Canada

Get it on Google Play

UK / Australia

Related content

  • Greylisting with Postgrey

    Vendors continue to develop new defenses against spam, one of the Internet’s most notorious pests. In this article, we integrate Postgrey with the Postfix mail server for a greylisting and whitelisting solution.

    more »
  • Security Lessons

    Are your systems secure against DNS attacks? We'll show you why they matter and help you determine whether you are vulnerable.

    more »
  • Bot_Attack

    While going about his normal duties, Linux Magazine author Charly Kühnast was hit with a mean attack. Charly’s separate anti-spam server, which sits in front of his mail server, saved him from the mail storm.

    more »
  • IndiMail 1.6 Includes Greylisting and BATV

    IndiMail, an email solution made of open source components, now includes greylisting spam filtering in version 1.6.

    more »
  • Intrusion 101

    You need to think like an attacker to keep your network safe. We asked security columnist Kurt Seifried for an inside look at the art of intrusion.

    more »
comments powered by Disqus

Visit Our Shop

Trial Subscription

Digital Subscription

Subscribe

Direct Download

Read full article as PDF:

046-047_kurt.pdf (587.58 kB)

News

Tag Cloud

Administration Community Desktop Events Hardware Linux Linux Pro Magazine Mobile Programming Software Ubuntu Web Development Windows free software open source