Network security should always be a concern with any type of communications, especially when using Session Initiation Protocol (SIP). There are special security considerations associated with SIP trunking you should be aware of to maintain safe communications, including the threat of a brute force attack or Denial of Service (DoS) attack. Here’s what you need to know to reduce the odds of your communications becoming compromised.
- Limiting the number of devices that can access your network is essential. This can be accomplished in a number of ways, including setting up access lists, voice source group definitions and hostname validation.
- Keep your enterprise network address invisible from outsiders through the use of a firewall that contain a SIP server and full SIP proxy, along with Intrusion Protection Services (IPS).
- Protect your system from toll fraud, which can financially devastate your business. Use strong passwords, check your call history often, and review your trunk usage history for sudden bursts in activity levels. Force everyone in your organization to change their passwords on a regular basis.
- Choose Secure Real-Time Transport Protocol (SRTP) encryption using descriptions for key exchange, as this is considered to be the industry standard when it comes to preventing eavesdropping.
Certain issues with your enterprise should be addressed as well, including:
- Determining how the enterprise will maintain control over routing, signaling and media.
- Developing protocol for dealing with threats.
- Deciding what security policies are needed for networks and VoIP systems.
Addressing all these concerns will not make your system infallible, but they will nonetheless reduce the odds of your communications becoming compromised. Ensuring secure communications is especially important if you operate a business where privacy is a concern, and failing to take the necessary steps could result in significant fines and penalties.
To ensure your system is as safe as possible,