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CHAPTER 9
Chapter 9: Antivirus Protection
One of the
many options for filtering with Procmail is to remove executable
attachments from e-mails in order to protect your system from possible
virus attacks. This will be, at best, a crude operation; at worst, it
will remove files that do not contain viruses and possibly leave other
infected documents such as scripts that are not executables. These can
have an equally devastating effect.
It is also possible to scan e-mails on the client side but in a company
environment, it is not always possible to rely on every individual
having their machines up to date and correctly installed with suitable
virus checking software. The obvious solution is to run an efficient
process on the server to ensure that all e-mail sent or received by the
organization is correctly scanned for viruses.
There are a number of antivirus solutions available for Linux-based
systems. We have chosen to focus on the ClamAV software. This is
open-source software and regular updates to the database of viruses
checked for are available for download.
- Requirements
- Adding a New System User and Group
- ClamAV
- Post Installation Testing
- Editing the Config Files
- clamd
- Closet Mirrors
- Sample Config File
Downloading, Building, and Installing ClamSMTP
- ClamSMTP
- Download Source Code
- Build and Install
- Configure into Postifx
Testing Filtering
- EICAR Test Virus
- Example: Test from the Command Line
- Testing CLAMD
- Testing Mail-Borne Virus Filtering
- Thorough E-Mail-Borne Testing
Automating Startup and Shutdown
Automating Update of Virus Data
Freshclam Configuration
Monitoring Log Files
Disinfecting Files
Summary
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PPaperback,
295 pages
Released: July 2005
ISBN: 190481137X
Authors: Alistair McDonald,
Carl Taylor, Magnus Bäck, David Rusenko, Ralf
Hildebrandt, Patrick Ben Koetter |
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Introduction
1: Linux and E-Mail Basics
2: Setting Up Postfix
3: Incoming Mail with POP and IMAP
4: Providing Webmail Access 
Free Chapter
5: Securing Your Installation
6: Getting Started with Procmail
7: Advanced Procmail
8: Busting Spam with SpamAssassin
9: Antivirus Protection
10: Backing Up Your System
Index
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View the book details
on PacktPub.com
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