Stormshield SN series - Support; Modbus; General Settings; Modbus Settings

Enable extension
UPDATE (RFC3311)
The UPDATE extension allows a client to update session parameters even before the
session has been set up, such as all media traffic and their codecs.
Select this option to enable the extension.
Enable extension
MESSAGE (RFC3428)
The MESSAGE extension is an extension of the SIP protocol, allowing the transfer of
instant messages.
Since the MESSAGE request is an extension of SIP, it inherits all the security and
progress features included in this protocol. The contents of MESSAGE requests are in
MIME format.
Select this option to enable the extension.
Enable extension
REFER (RFC3515)
The REFER extension is used in particular for the transfer or redirection of calls. If Peer
A tries to contact Peer B who is not available, A will be redirected to Peer C, who will
act as B’s “referrer”.
Select this option to enable the extension.
Enable extension
PUBLISH (RFC3903)
The PUBLISH extension allows publishing the status of events to a recipient.
Select this option to enable the extension.
Enable support for
PINT protocol
This extension allows SIP telephones to coexist with non-IP services (fax, etc.).
Select this option to enable the extension.
Enable support for
Microsoft Messenger
(MSN)
This option allows enabling support for Microsoft Windows Messenger.
Support
Disable intrusion
prevention
When this option is selected, the scan of the SIP protocol will be disabled and traffic
will be authorized if the filter policy allows it.
Log every SIP request Enables or disables the logging of SIP requests.
MODBUS
General settings
Max. number of
pending requests
Maximum number of requests without responses in a single Modbus session. This
value has to be between 1 and 512 seconds (default value: 10).
Maximum request
duration (seconds)
This value is the period after which Modbus requests without responses will be
deleted. This value has to be between 1 and 3600 seconds (default value: 10).
Support serial
gateways
If this option is selected, you will allow protocol scans for Modbus traffic heading to
the TCP Modbus gateway to the serial port (in this case, Modbus messages will have
fields containing particular values).
Modbus settings
Maximum message
size (bytes)
This value makes it possible to restrict the size allowed for a Modbus message. It has
to be between 8 and 4096 (default value: 260).
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SNS - USER CONFIGURATION MANUAL V.3
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