Configuring Security Features
239
3.
Click
Upload
to upload the certificate.
To configure the device certificate via web user interface:
1.
Click on
Security
->
Server Certs
.
2.
Select the desired value from the pull-down list of
Device Certificates
.
3.
Click
Confirm
to accept the change.
A dialog box pops up to prompt that the settings will take effect after a reboot.
4.
Click
Confirm
to reboot the system immediately.
To upload a device certificate via web user interface:
1.
Click on
Security
->
Server Certs
.
2.
Click
Browse
to locate the certificate (*.pem or *.cer) from your local system.
3.
Click
Upload
to upload the certificate.
Secure Real-Time Transport Protocol
During a confidential call, you can configure Secure Real-Time Transport Protocol (SRTP) to
encrypt RTP streams to avoid interception and eavesdropping. Both RTP and RTCP signaling
may be encrypted using an AES algorithm as described in RFC3711. Encryption modifies the
data in the RTP streams so that, if the data is captured or intercepted, it cannot be
understood—it sounds like noise. Only the receiver knows the key to restore the data. To use
SRTP encryption for SIP calls, the participants in the call must enable SRTP simultaneously. When
this feature is enabled on both systems, the encryption algorithm utilized for the session is
negotiated between the systems. This negotiation process is compliant with RFC 4568.
Summary of Contents for VC400
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