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November 3, 2023

9 VoIP security best practices to consider for your business

Is VoIP safe to use? Not all the time. Nevertheless, it is possible to offer security. Find out more about VoIP security best practices to avoid having your calls intercepted.

VoIP, or voice-over-IP, is a contemporary communications technology that replaces traditional phone lines by utilizing the stability and speed of the current internet connections. Calls from PCs, VoIP phones, smartphones, and specialized browsers are all possible with it. It benefits businesses as well as customers because it has functionality that landline phones do not. VoIP provides multiple benefits such as improved flexibility, agility, and cost-effectiveness. Your employees can operate on any device, from anywhere, if you have VoIP installed. 

VoIP will surely dominate business communications in the future. However, protecting your VoIP communications is crucial to ensure your privacy, data, and sensitive information remain secure.

In this article, we'll cover all you need to know about VoIP in the following sections:

  • VoIP Security Issues: Why It Matters
  • VoIP security best practices
  • Conclusion

VoIP Security Issues: Why It Matters

VoIP offers numerous benefits, including cost savings, flexibility, and enhanced features, making it an attractive choice for individuals and businesses. Furthermore, VoIP security is crucial for protecting VoIP systems from attacks that can give hackers access to private communication information without authorization. 

According to IBM Data Breach Report revealed that an alarming 83% of companies experienced more than one data breach during last year. This is why VoIP security matters and it should be a top priority for anyone using VoIP technology.

VoIP security best practices

It's critical to maximize VoIP security measures as soon as possible due to the range of potential threats to your VoIP systems.

For an immediate start, consider these nine VoIP security best practices.

1. Find a Trustworthy VoIP Provider

The first step in protecting your VoIP conversations is to choose a reliable and trustworthy VoIP service provider. However, VoIP's compliance with security protocols determines its level of security. Verify the provider's strong security protocols, including encryption, frequent security updates, and a solid history of protecting user data.

2. Set Up a Firewall

Reliable firewall software is essential for many other IT security applications, including VoIP security. Your VoIP system's firewall will check every incoming and outgoing data to make sure it's secure. 

The firewall will recognize and take control of any spam or threat that is directed at your system, protecting it from attack. Furthermore, a strong firewall will provide unhindered data packet transmission.

3. Strong Passwords for Credentials

According to Digital Shadows, hackers exposed more than 24 billion passwords. Therefore, the first thing that can protect you from unauthorized access is a password. The tools and platforms you use for managing sensitive data are not any different from your VoIP system. Thus, it must be secured using strong passwords that are changed on a regular basis. Try to find character combinations that consist of at least 12 characters, including special symbols, numbers, and both upper- and lower-case letters.

Setting a password as soon as you configure your VoIP system is essential. If not, you might overlook it in the future. Additionally, keep in mind that certain VoIP phones have pre-set passwords that are frequently made public. For this reason, you need to make it yours as soon as you have the opportunity. Try to switch up your passwords at least once every three months.

4. Call Encryption

Call encryption uses Transport Layer Security (TLS) and Secure Real-Time Transport Protocol (SRTP) to offer superior security for each and every call. For data, every encryption-capable layer ought to be used. End-to-end encryption is a feature that modern VoIP systems should provide, mumbling call data so that it is useless to hackers. This ensures that even if someone intercepts your communications, they won't be able to decipher the data. Live solution allows you to elevate your usual communication using an e2e encrypted connection to boost sales, support, and new customer acquisition.

5. Use a VPN for Remote Workers

Security is crucial at a time when working remotely is growing in popularity. No matter where your employees are located, Virtual Private Networks (VPNs) are excellent software that encrypts traffic. To prevent data breaches and leaks, you can build up such a network for remote employees. The call quality won't suffer when you use this service, which is great news. 

Related study: 12 Benefits of using a virtual front desk receptionist

6. Enable Network Address Translation (NAT)

NAT, also known as network address translation, is a router feature that gives your PCs, VoIP phones, and other devices a private IP address only visible within your local area network. This IP address masking keeps the VoIP phone and the public internet apart. A hacker will not be able to remotely control the device without the IP address.

A VoIP phone with a public IP address is likely to receive several "ghost calls" from people trying to figure out what kind of device it is. The hackers use this to figure out the target. However, for this reason, owning a private IP address is crucial. A network address translator (NAT) puts an additional line of protection between your VoIP phone and potential hackers.

7. Disable Phone Web Interface

Many crucial phone attributes, such as codecs, call settings, network and SIP settings, and business VoIP phone accounts, can be established and updated using a VoIP phone web interface. Through the VoIP phone's web interface, customers can also download a backup configuration of the phone, which exposes phone users' plaintext usernames and passwords.

The most likely weak point of entry for your business phone is usually the web interface. When utilized appropriately, it can be a useful tool, but it is also a major target for hackers who seek fraudulent possession of your business phone.

8. Switch Off International Calling

Hackers attempt to utilize VoIP phones for fraudulent purposes, which leads to them gathering a lot of calling minutes for pricey international country numbers. It would make sense to turn this option off if you rarely make international calls. If you frequently make calls abroad, pay attention to the information on your phone.

You can buy a calling card as a temporary solution if you must make calls to another nation. However, if you must turn on international calling for any reason, keep an eye on your phone records.

9. Update your system regularly

Regular software updates can help protect your devices from internet threats, even though they may seem like an expense. This is particularly true for VoIP phone systems, as providers frequently encounter attempted breaches that can only be resolved with prompt and efficient software upgrades. 

Users should be asked to update their operating systems as this can prevent attacks by malware. To ensure that every device in your company is updated on a regular basis, even if there is just one outdated device, it can even make sense to delegate this responsibility to a security person within the company.


VoIP security is not just a recommended best practice, it's a necessity in today's digital landscape. VoIP, or voice over internet protocol, is a dependable technology that has a number of benefits over phone lines. Large businesses can take advantage of it, despite limitations such as the need to rely entirely on the Internet to function. 

However, failing to secure your VoIP communications can lead to privacy breaches, data theft, financial losses, and damage to your reputation. Protecting your VoIP system is an investment in both your privacy and the security of your personal or business communications.

Implementing the eight VoIP security best practices discussed above will greatly reduce the possibility of someone hacking into your VoIP service.

Get in touch with us today to find out more about how the Live product family can improve your global customer experience strategy and to get more information on how to put these improvements into practice.

Learn more about how the Live product family can help you support and improve your customer experience strategy.

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