At Media5, we use state-of-the-art security technologies to secure our units. Therefore, when using Mediatrix Gateways for Internet telephony network applications, one can be assured to be protected with the best security mechanisms and features available in the industry.
In an Internet telephony network, there are two aspects that must be secured:
To provide security, the following must be tackled:
Furthermore, several security mechanisms are used in our Mediatrix products to ensure security:
As defined in the Oxford Dictionary, authentication is the process or action of verifying the identity of a user or process.
In an Internet telephony network environment, authentication will allow the Mediatrix unit to make sure the peer it is communicating with is the proper network or endpoint (unit or end-user device). This provides a level of security for communications as no communication will be allowed if the authentication is not confirmed.
The Mediatrix unit uses digital X-509 certificates which are based on the international X.509 Public Key Infrastructure (PKI) standard. These certificates are a collection of data used to verify the identity of individuals, computers, and other entities on a network.
X.509 certificates provide guaranties on confidentiality, authentication, integrity, and non-repudiation. The Public Key Infrastructure (PKI) is a set of rules, specific to an environment, that manages, distributes, stores, and revokes the certificates. Therefore, the PKI guaranties that the signed certificates can be trusted.
Certificates are used to secure the following TLS based connections:
The Transport Layer Security protocol provides data privacy and integrity for computer network communications.
TLS is used for:
When a certificate is Authentication, a secure TLS
connection is established with a peer. Then SIP, Hypertext Transfer Protocol Secure (HTTPS), and TR-069 can be used over the TLS connection.
TLS connections also prevents man-in-the-middle attacks. Important The Mediatrix unit does not support a mix of both TLS and non-TLS links. Once TLS is enabled, it is enabled for all configured SIP gateways.
The Mediatrix unit does not support a mix of both TLS and non-TLS links. Once TLS is enabled, it is enabled for all configured SIP gateways.
Although some parameters are available through the Web GUI, many parameters are not accessible through the Web GUI:
For more details on advanced parameters, refer to reference_wp5_5dq_4cb.
HTTPS is a transfer protocol widely used to secure communications over Internet telephony networks.
HTTPS allows for communications over Hypertext Transfer Protocol (HTTP) within a connection encrypted by Transport Layer Security (TLS) (TLS). HTTPS is mainly used to secure the content of a Web site and securely transfer files.
A communication using HTTPS reasonably guaranties that the targeted peer is the proper one, not an impostor, and that media cannot be read or tampered by any third-party.
An important aspect of communications security, is that data sent and received from one endpoint to another remains secured, reliable, and private at all times.
When configured for complete security, signaling is performed with TLS with the use of a certificate and the unit transports the audio and video through Secure RTP (SRTP). The Mediatrix unit will make sure that the certificate specifically encrypted for the session and issued by the end user is valid, e.g.:
Signaling is the protocol that activates a device located in the network and establishes calls between peers.
To provide security to signaling, the Mediatrix unit will connect to the network via SIP over TLS. The network is then authenticated by a certificate that guaranties that the Mediatrix unit is connected to a "safe" network.
The network will then authenticate the device with the username and password to make sure the device is part of the network's subscriber list. This authentication is done with the digest authentication. The result of these authentications and verifications provides private and reliable communications between the network and the device. Calls will be established without leaving any possibility to a third party to identify the called or callee number, or to be able to interfere with the communication in any way.
Media is voice, video, or data exchanged between 2 endpoints during a communication.
To secure media routed from one endpoint to another, a secret and unique encryption key is generated for that specific exchange of media. For security, the key is exchanged during signaling, via a TLS connection. Once the key is exchanged, endpoints will directly communicate one with another using SRTP with an encrypted communication.
This ensures that voice, video or data, is impossible to decrypt by any one else than the endpoints involved in the communication. Therefore calls will be carried out without leaving any possibility to a third party to eavesdrop the media in any way.
The Denial of Service (DoS) attack is an attempt to make a machine or network resource unavailable by overloading it with useless traffic. This has the effect of temporarily or indefinitely interrupting or suspending services of a user connected to the Internet.
The Mediatrix units can address these DoS with the use of Firewalls and the Sbc service.
The Sbc service, available only on the Mediatrix Sentinel series, offers major security functionalities.
An important aspect of Management security is that data used for operation, administration, maintenance, provisioning, and troubleshooting (OAMPT) of the CPE device remains private and secured at all times when management tasks are being carried out.
The Mediatrix units can be configured with different tools, but in all situations, data is always protected; either by using passwords or by Transport Layer Security (Transport Layer Security (TLS)).
The TR-069 also known as CWMP, is a Broadband Forum technical specification. This protocol can be used to remotely monitor and update customer-premise equipment configurations and firmware.
Simply said, TR-069 defines a protocol to remotely and automatically configure and manage Mediatrix devices with Auto Configuration Servers (ACS).
Because data used to remotely manage end-user devices include personal and private information (for instance username and passwords) it is vital that the communication channel be secured and the device always be authenticated by the ACS.
Using the HTTPS protocol, the device authenticates the ACS by verifying the ACS certificate and device identity is verified by the ACS using a password which can be changed at each session.
The unit configuration is password-protected.
The unit configuration is restricted in all the interfaces by password protection i.e. a password is required for all security protections (TR-069, SNMPv3, etc.). Local passwords or a centrally managed password (with RADIUS) can be used.
A profile is a factory customisation where parameter values, skins, and branding are defined specifically for a customer.
The customer profile can include security information such as:
Carriers and service providers usually define a configuration that will apply to a large number of units in compliance with the network architecture. It is the commands and the parameter values grouped in a text file that produce the Configuration Scripts.
To enforce security, configuration scripts can be encrypted and only Mediatrix units with the matching encryption key will be capable of decrypting and applying the configuration settings. Furthermore, configuration scripts can be downloaded and uploaded using Hypertext Transfer Protocol Secure (HTTPS).
The Command Line Interface (CLI) provides an access to interactively configure all the Mediatrix unit parameters.
The CLI is accessed through either a secure SSH session (default) or an unsecure TELNET session. When using a secure SSH session, all communications between Client and server are encrypted before being sent over the network, thus packet sniffers are unable to extract user names, passwords, and other potentially sensitive data. This is the default and recommended way to access the Command Line Interface.
The command interpreter interface of the CLI allows the user to browse the unit parameters, write the command lines, and display the system's notification log.
The Simple Network Management Protocol (SNMP) allows you to configure and monitor the device parameters inside a network.
The Mediatrix units support SNMPv3, allowing the authentication and encryption of the management traffic. This feature provides secure connections between Mediatrix devices and Element Management System (EMS). Interoperable, SNMPv3 is a standard-based protocol that is defined in RFCs 3413 to 3415.
Firewalls allows you to create and configure rules to filter packets to ensure the information comes from a trusted sender.
The Mediatrix units support two types of firewalls:
The local firewall is a security feature that allows you to protect your Mediatrix unit from receiving packets from unwanted or unauthorised peers. The local firewall, by default, drops all incoming packets and lets incoming packets go through only if they match the requirement of a rule.
The network firewall provides a means to dynamically create and configure rules to filter packets forwarded by the unit. Since this is a network firewall, rules only apply to packets forwarded by the unit. The traffic is analysed and filtered by all the rules configured.
Firewalls provides a protection against Denial of Service attacks by limiting the connection frequency under the configurable thresholds and by sending the faulty peers to a blacklist.
Mediatrix units are supplied with an exhaustive set of documentation.
Mediatrix user documentation is available on the Documentation Portal .
Several types of documents were created to clearly present the information you are looking for. Our documentation includes:
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