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Overview
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| acting as P-CSCF or I-BCF is configurable to intercept IMS sessions using Lawful Interception (LI) techniques (legally sanctioned official access to private communications). This feature can also be used in non-IMS deployments to intercept audio, clear mode and fax streams. At a high level, SBC Lawful Intercept functionality includes: |
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Perform these steps if not already configured in EMS. The LI license is provisioned before interception, using EMS. For more details to provision LI license, refer to EMS User Guide. |
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| Configure the CDC |
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| Configure the CDC |
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Configuring the Call Data Channel
To configure Call Data Channel (CDC), perform the following steps:
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| Configure CDC with IP Interface Group |
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| Configure CDC with IP Interface Group |
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Configuring CDC with IP Interface Group
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% set addressContext default intercept callDataChannel CDC ipInterfaceGroupName LIG1
commit |
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Mediation server’s ipInterfaceGroup must be different from other signaling ipInterface groups. This ensures that LI doesn't use signaling ipAddress to send intercepted traffic (media/signaling) towards Mediation Server. |
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| Configuring CDC for Intercept Flavor as IMS LI |
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| Configuring CDC for Intercept Flavor as IMS LI |
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Configuring CDC for Intercept Flavor as IMS LI
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% set addressContext default intercept callDataChannel CDC mediationServer MS1 media tcp ipAddress 10.54.78.20 portNumber 65120
commit
% set addressContext default intercept callDataChannel CDC mediationServer MS1 media tcp state enabled mode inService
commit |
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Mediation server’s ipInterfaceGroup must be different from other signaling ipInterface groups. This ensures that LI doesn't use signaling ipAddress to send intercepted traffic (media/signaling) towards Mediation Server. |
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| Configuring CDC for Media Interception Over UDP |
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| Configuring CDC for Media Interception Over UDP |
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Configuring CDC for Media Interception Over UDP
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% set addressContext default intercept callDataChannel CDC mediationServer MS1 media udp ipAddress 10.54.78.20 portNumber 65200
commit
% set addressContext default intercept callDataChannel CDC mediationServer MS1 media udp state enabled mode inService
commit |
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The protocolType "udp" is not supported for Signaling interception in this release. |
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| Configuring CDC for Signaling Interception |
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| Configuring CDC for Signaling Interception |
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Configuring CDC for Signaling Interception
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% set addressContext default intercept callDataChannel CDC mediationServer MS1 signaling ipAddress 10.54.78.25 portNumber 65300 protocolType tcp
commit
% set addressContext default intercept callDataChannel CDC mediationServer MS1 signaling state enabled mode inService
commit |
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The protocolType "udp" is not supported for Signaling interception in this release. |
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| Configuring CDC for RTCP Interception |
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| Configuring CDC for RTCP Interception |
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Configuring CDC for RTCP Interception
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Enter the show commands to view the configurations.
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| Viewing the Intercept Details |
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| Viewing the Intercept Details |
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Viewing the Intercept DetailsView To view the intercept details, by executing execute the following command:
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> show status addressContext default intercept interceptCallDataChannelStatistics default
primaryChannelStatuscallDataChannel
callDataChannel CDC {
outOfService;
secondaryChannelStatusmediationServerMediaStatus MS1 outOfService;{
StartSuccess tcpChannelstatus 0outOfService;
StartFailures tcpPacketsSent 0;
StopSuccess tcpPacketsLost 0;
StopFailures udpPacketsSent 0;
CallAnswerSuccess 0;
CallAnswerFailures udpPacketsLost 0;
CallDisconnectSuccess 0;
CallDisconnectFailures 0;}
ServiceInstanceSuccess 0;
ServiceInstanceFailures 0;
IndicationSuccess mediationServerSignalingStatus MS1 {
0;
IndicationFailures tcpChannelStatus 0outOfService;
KeepAliveSuccess 0;
KeepAliveFailuresDSRSuccess 0;
RestartSuccess 0;
RestartFailures DSRFailures 0;
RadiusAckReceived 0;
StartResponsesReceived 0;}
}
[ok] |
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| Viewing the CDC Configuration |
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| Viewing the CDC Configuration |
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Viewing the CDC ConfigurationView To view the CDC configuration, by executing execute the following command:
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% show addressContext default intercept callDataChannel CDC
interceptStandard etsi threeGpp;
vendorId verint utimaco;
ipInterfaceGroupName LIG1;
liPolDipForRegdOodMsg enabled;
rtcpInterception enabled;
mediationServer MS1 {
signaling {
ipAddress 10.70.54.48;
portNumber 9632;
mode inService;
state enabled;
}
media {
tcp {
ipAddress 10.54.78.2070.54.48;
portNumber 8007;
mode inService;
state enabled;
}
udp {
ipAddress 10.70.54.48;
portNumber 651207241;
mode inService;
state enabled;
}
}
}
[ok] |
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