Nokia IP60 - Security Appliance, Руководство пользователя

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Overview
310 Nokia IP60 Security Appliance User Guide
If a virus if found in
this protocol... VStream Antivirus does this... The protocol is detected
on this port...
IMAP
Terminates the
connection
Replaces the virus-
infected email with a
message notifying the
user that a virus was
found
The standard TCP port 143
SMTP
Rejects the virus-
infected email with error
code 554
Sends a "Virus
detected" message to
the sender
The standard TCP port 25
FTP
Terminates the data
connection
Sends a "Virus detected"
message to the FTP
client
The standard TCP port 21
TCP and UDP
Terminates the
connection
Generic TCP and UDP ports,
other than those listed above
Note:
In protocols that are not listed in this table, VStream Antivirus uses a "best
effort" approach to detect viruses. In such cases, detection of viruses is not
guaranteed and depends on the specific encoding used by the protocol.
If you are subscribed to the VStream Antivirus subscription service, VStream Antivirus virus signatures are
automatically updated, so that security is always up-to-date, and your network is always protected.
Note:
VStream Antivirus differs from the Email Antivirus subscription service (part of
the Email Filtering service) in the following ways:
Email Antivirus is centralized, redirecting traffic through the Service
Center for scanning, while VStream Antivirus scans for viruses in the
Nokia IP60 gateway itself.
Email Antivirus is specific to email, scanning incoming POP3 and
outgoing SMTP connections only, while VStream Antivirus supports
additional protocols, including incoming SMTP and outgoing POP3
connections.
You can use either antivirus solution or both in conjunction. For information on
Email Antivirus, see
Email Filtering on page 337.