Administrator's Manual 31.Configuring SIP TLS
Version 2.2.8 211 400HD Series IP Phones
31 Configuring SIP TLS
This section shows how to manage Transport Layer Security (TLS) and certificates. TLS is a
cryptographic protocol which provides communication security over the transport layer
(TCP). TLS is used to secure the IP Phone's SIP signaling connections, Web interface, and
Telnet server over TCP/IP. Typically, TLS protocol uses Private and Public keys for
authentication. A Certification Authority (CA) performs authentication. Full protocol
specification is updated in RFC 5246.
Note: Before you can connect to a TLS server, you need to ensure that the same
certificate and Trusted Root CA are loaded to both the phone and the TLS server. For
more information, see Section 29.
31.1 Configuring TLS
This section shows how to configure TLS for the SIP connection between the phone and a
TLS server.
To configure TLS using the Configuration File:
• Use the table below as reference.
Table 31-1: SIP-over-TLS Parameters
Parameter Description
SIP Transport Protocol
[voip/signalling/sip/transport_protocol]
Specifies the SIP Transport protocol.
• If using the 'sip' prefix, set to 'TLS'
•
If using the 'sips' prefix, set to 'TCP'
TLS Port
[voip/signalling/sip/tls_port]
Defines the local TLS SIP port for SIP messages.
Range:1024 - 65535. Default:5061.
/voip/signalling/sip/enable_sips
If signaling protocol is set to TCP and we want to
activate TLS, this parameter should be enabled. In
this case we will use 'sips' prefix instead of “sip:”
31.1.1 Configuring SIP TLS using the Web Interface
This section shows how to configure SIP TLS using the Web interface.
Note: This procedure is typically used for evaluation purposes only.
To configure TLS using the Web interface:
1. Access the Signaling Protocols page (Configuration tab > Voice Over IP menu >
Signaling Protocols) and scroll down to the SIP General screen section.
2. From the 'SIP Transport Protocol' drop-down list, select TLS.
3. In the 'TLS Port' field, enter 5061.
4. Configure the other parameters using Table 17-1 as reference under Section 17.1 on
page 89.
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