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Oracle SBC Security Guide

Appendix C: DDoS Prevention for Peering Environments

Configuration Models:

The settings outlined in this appendix apply to the following configuration models:

PBRB

Policy Based Realm Bridging Model

SNB

SIP NAT Bridge Model

SSNHTN

Single SIP NAT Hosted in Trusted Network Model

Supported platforms

Platform

CAM

Memory

AP 4250

64K

AP 4250

256K

AP 4500(CPU1)

256K

AP 4500(CPU2)

256K

AP 3820

128K

AP 6300

724k

16Gb

Configuration Parameters

The following sections will discuss those DDoS prevention parameters pertinent to the scope of this

appendix. These parameters are found in three configuration areas: Media Manager, Realm

Configuration, and SIP Interface.

DDoS Configuration Parameter Descriptions

Media Manager

The following media-manager parameters have been calculated for each configuration model.

Parameter

Value

max-untrusted-signaling

Maximum percentage of allocated total CPU usage

for untrusted traffic (%)

min-untrusted-signaling

Minimum percentage of allocated total CPU usage

for untrusted traffic (%)

max-signaling-bandwidth

The maximum bandwidth that the SBC can

withstand (bytes/sec)

Typically, these parameters are not applied in peering configuration as the source of peer traffic is

assumed to be trusted. However, because these parameters values are set at default ‘0’, with the purpose

of maximizing the CPU resource for trusted traffic, it is suggested to minimize these values to ‘1’ so that

to guarantee optimal performance on trusted peer traffic.

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