The challenge with this approach is how you make intercepted calls non-distinguishable from regular calls. The intercepted party may watch signaling and notice service provider's IP addresses. Also, the quality may degrade through use of RTP relay.
A possible option is to ingore this problem.
Other option would be to implement interception in edge routers. Obviously, it is not an easy one.
-jiri
At 01:16 PM 3/2/2005, Java Rockx wrote:
I was thinking about having a group called "spy" in the grp table and anyone with this ACL would be sent to a modified mediaproxy that would capture the RTP.
User that don't have the "spy" ACL would be handled normally and if NAT traversal is needed then use an unmodified media proxy.
Regards, Paul
On Wed, 2 Mar 2005 08:00:24 -0000, Chris ser@cannes.f9.co.uk wrote:
Why not use a from/to etc detection in .cfg (using database...) to trigger a remote proxy through the requesting agency They then have the capture issue and you have no monitor or delivery issues? Might require conditions of their placement of a proxy? (but is their problem) Regards Chris
-----Original Message----- From: serusers-bounces@iptel.org [mailto:serusers-bounces@lists.iptel.org] On Behalf Of Java Rockx Sent: 26 February 2005 14:29 To: serusers@lists.iptel.org Subject: [Serusers] RTP Wiretapping
Hi All.
I'm located in the US and would like to comply with the Communications Assistance for Law Enforcement Act (CALEA) that Congress passed which basically says that VoIP providers should have the ability to wiretap conversations for the FBI upon request.
I use mediaproxy for NAT traversal. So my question is how can I be CALEA compliant? I assume I should be able to modify mediaproxy to write RTP streams to disk, but I'm unclear on how to "mix" both sides of the conversation.
Can anyone help with a suggestion?
Regards, Paul
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