MSM Encryption process

IP Security in general, Thales boxes, SSM (Server Security Mode), MSM (Media Security Module), etc....
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acse_DUP
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Posts: 4
Joined: 08 Oct 2009 10:52

MSM Encryption process

Post by acse_DUP »

Hello
I just want to understand what does the msm receiving a frame to encrypt it.
What if the frame is TOS tagged, do the tagged change ?
Thanks in advance.
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LLE_DUP
Member
Posts: 2
Joined: 02 Oct 2009 06:14

Re: MSM Encryption process

Post by LLE_DUP »

MSM (Media Security Module) deals with 2 kinds of IP flows:
1) Signaling call control
2) Voice Media
For #1 IPSec protocol is used in transport mode (IP header of packets is kept unchanged).
For #2 SRTP protocol is used.

So in all cases TOS/Diffserv fields value is transmitted without any change after encryption proceeded by the MSM.
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