User`s manual

Medium level virus scanning prevents known viruses from passing through the firewall from your internal
network to the Internet while still allowing virus free HTTP downloads and email attachments to pass through
the firewall.
To configure medium level virus protection to prevent the distribution of viruses from your internal network:
• Go to Anti-Virus > HTTP > Incoming.
• Click Medium to virus scan target files downloaded from your web server to users on the Internet.
• Click Detail and select the types of scanning to use.
Signature Scan
Scan the target file for byte-strings that identify known viruses.
Macro Scan
Extract macros from MS Office files and scan them for known macro viruses.
• Click OK and click Apply.
• Go to Anti-Virus > SMTP > Incoming and repeat steps See Click Medium to virus scan target files
downloaded from your web server to users on the Internet. to See Click OK and click Apply. to configure
medium level virus protection to virus scan target files in email attachments in SMTP traffic.
• Go to Anti-Virus > POP3 > Incoming and repeat steps See Click Medium to virus scan target files
downloaded from your web server to users on the Internet. to See Click OK and click Apply. to configure
medium level virus protection to virus scan target files in email attachments in POP3 traffic.
• Go to Anti-Virus > IMAP > Incoming and repeat steps See Click Medium to virus scan target files
downloaded from your web server to users on the Internet. to See Click OK and click Apply. to configure
medium level virus protection to virus scan target files in email attachments in IMAP traffic.
When the DFL-500 detects a virus and removes the infected file, the user who requested the file receives a
message similar to the following:
Sorry, Dangerous Attachment has been removed.
It was infected with the "Generic VBA Virus" virus
Low level virus protection for incoming connections
Incoming low level protection suspends virus protection. All target files are forwarded unchanged to their
destinations.
To configure incoming low level protection:
• Go to Anti-Virus > HTTP > Incoming.
• Click Low to turn off virus scanning for Internet web pages.
• Click Apply.
• Go to Anti-Virus > SMTP > Incoming and repeat steps See Click Low to turn off virus scanning for
Internet web pages. and See Click Apply. to turn off virus scanning for email attachments in SMTP traffic.
• Go to Anti-Virus > POP3 > Incoming and repeat steps See Click Low to turn off virus scanning for
Internet web pages. and See Click Apply. to turn off virus scanning for email attachments in POP3 traffic.
• Go to Anti-Virus > IMAP > Incoming and repeat steps See Click Low to turn off virus scanning for
Internet web pages. and See Click Apply. to turn off virus scanning for email attachments in IMAP traffic.
Worm protection
You can configure worm protection to screen web and email traffic to prevent worms from infecting your
internal network.
This section describes:
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