  Controlling system viruses
You can check incoming email for viruses using Symantec AntiVirus scan engine. This engine allows you to enable scanning of inbound and outbound email attachments and to delete infected ones before they are delivered to your users' Mailboxes.
Note
For information on ordering the Symantec AntiVirus scan engine send a message to virus_scanning@firstclass.com.
When the anti-virus checker detects an infected attachment on an inbound message, Internet Services deletes the attachment and replaces it with warning text. On outbound messages containing infected attachments, Internet Services stops sending the message and returns an NDN message with a warning text. You can set the text of the warning notification on the Antivirus tab on the Advanced Mail form.
You can also optionally set the name of the notification attachment (warning text) in the rules.AttachmentBlock document. The name must start with an equal sign followed by the new filename (maximum 63 characters.) Here is an example of the name added to a rules.AttachmentBlock file:
# This file contains a list of unacceptable file name/file type and creator patterns, one per line.
# It also contains some 'helpful' text that replaces the attachment.
#
# The help text is one or more lines that start with a colon.
# The optional name for the replacement attachment name is given
# on a line that starts with an equal sign (default is BlockedAtt.txt)
=VirusHasBeenDetected.txt
# The attachment names are case-insensitive, and use the DOS wildcard convention
# of * and ?
# Macintosh file type and creator patterns can be specified as well,
# using the syntax 'TTTT:CCCC' where TTTT is the file type, and CCCC
# is the creator. Use ? as a wildcard character.
:The attachment \@ that would have been here has been discarded,
:because it's name or type matched an entry that the Administrator
:considers dangerous or unacceptable.
*.exe
*.scr
'APPL:????'
Installing the Symantec AntiVirus Engine
Note
You can download the Symantec AV Engine implementation guide in PDF format, which includes full installation instructions, at ftp://ftp.symantec.com/public/english_us_canada/products/symantec_antivirus/scan_engine/4.3/manuals/scaneng_imp_guide.pdf
You can install the Symantec AV Engine version 4.3 on these operating systems following these system requirements:
• Pentium III 500 MHz or higher
• 256 MB RAM or higher
• 25 MB hard disk space
• 1 network interface card (NIC) running TCP/IP with a static IP address
• Internet connection for LiveUpdate of virus definitions.
• Sun Ultra 10 or higher
• SPARC 400 MHz or higher
• 256 MB RAM or higher
• 35 MB hard disk space
• 1 network interface card (NIC) running TCP/IP with a static IP address
• Internet connection for LiveUpdate of virus definitions.
• Pentium III 500 MHz or higher
• 256 MB RAM or higher
• 25 MB hard disk space
• 1 network interface card (NIC) running TCP/IP with a static IP address
• Internet connection for LiveUpdate of virus definitions.
• on any computer that can access the Scan Engine server:
• Microsoft Internet Explorer 6.0 (SP1) or later
• Netscape Navigator 7.01 or later with a Java 2 runtime (version 1.4 or later) installed for Web-based administration
Installing on Windows
1 Log in as administrator (or a user with administrator access) to the computer on which you plan to install the Scan Engine.
2 Copy the ScanEngine.exe file from the CD onto the computer.
3 Run the ScanEngine.exe file.
4 Accept the license agreement.
5 Select the location to install the software.
6 Select the ICAP protocol.
7 Follow the remaining prompts to complete the installation.
Installing on Sun Solaris and Red Hat Linux
Note
You may need to install additional packages from Red Hat.
1 Log in as root to the computer on which you plan to install the Scan Engine.
2 Copy the file ScanEngine.sh from the CD to a temporary directory.
3 Open the temporary directory from step 2.
You need to be in the correct directory before running the ScanEngine.sh installer.
4 Type "sh ./ScanEngine.sh" (no quotes) and press Enter.
5 Accept the license agreement.
6 Accept the defaults for creating the "avdefs" group, and the location to install files.
7 Select the ICAP protocol.
8 Accept the default port value 1344.
9 Follow the remaining prompts to complete the installation.
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