User's Manual
330
Document #: LTRT-10375
Mediant 500 MSBR
Pre-Parsing Manipulation
Set
pre-parsing-man-
set
[SIPInterface_PreParsin
gManSetName]
Assigns a Pre-Parsing Manipulation Set to the SIP Interface. This lets
you apply pre-parsing SIP message manipulation rules on any incoming
SIP message received on this SIP Interface.
By default, no Pre-Parsing Manipulation Set is assigned.
To configure Pre-Parsing Manipulation Sets, see Configuring Pre-parsing
Manipulation Rules on page 392.
Note:
Pre-Parsing Manipulation is done only on incoming calls.
The device performs Pre-Parsing Manipulation before Pre-
Classification Manipulation and Classification.
Classification
Classification Failure
Response Type
classification_fail_respon
se_type
[SIPInterface_Classificati
onFailureResponseType]
Defines the SIP response code that the device sends if a received SIP
request (OPTIONS, REGISTER, or INVITE) fails the SBC Classification
process.
The valid value can be a SIP response code from 400 through 699, or it
can be set to 0 to not send any response at all. The default response
code is 500 (Server Internal Error).
This feature is important for preventing Denial of Service (DoS) attacks,
typically initiated from the WAN. Malicious attackers can use SIP
scanners to detect ports used by SIP devices. These scanners scan
devices by sending UDP packets containing a SIP request to a range of
specified IP addresses, listing those that return a valid SIP response.
Once the scanner finds a device that supports SIP, it extracts information
from the response and identifies the type of device (IP address and
name) and can execute DoS attacks. A way to defend the device against
such attacks is to not send a SIP reject response to these unclassified
"calls" so that the attacker assumes that no device exists at such an IP
address and port.
Note:
The parameter is applicable only if you configure the device to reject
unclassified calls, which is done using the 'Unclassified Calls'
parameter (see Configuring Classification Rules on page 663).
The parameter is applicable only to the SBC application.
Pre Classification
Manipulation Set ID
preclassification-manset
[SIPInterface_PreClassifi
cationManipulationSet]
Assigns a Message Manipulation Set ID to the SIP Interface. This lets
you apply SIP message manipulation rules on incoming SIP initiating-
dialog request messages (not in-dialog), received on this SIP Interface,
prior to the Classification process.
By default, no Message Manipulation Set ID is defined.
To configure Message Manipulation rules, see Configuring SIP Message
Manipulation on page 381.
Note:
The Message Manipulation Set assigned to a SIP Interface that is
associated with an outgoing call, is ignored. Only the Message
Manipulation Set assigned to the associated IP Group is applied to
the outgoing call.
If both the SIP Interface and IP Group associated with the incoming
call are assigned a Message Manipulation Set, the one assigned to
the SIP Interface is applied first.
The parameter is applicable only to the SBC application.
Media
Summary of Contents for Mediant 500 MSBR
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Page 115: ...Part III General System Settings ...
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Page 137: ...Part IV General VoIP Configuration ...
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Page 455: ...Part V Gateway Application ...
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Page 837: ...Part X Status Performance Monitoring and Reporting ...
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Page 927: ...Part XI Diagnostics ...
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Page 977: ...Part XII Appendix ...
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