Malware can also install itself onto these systems and compromise their functionality. Call tampering — This type of attack involves the tampering of a phone call in progress. This can result in degraded quality of a call, interfering with SIP signaling, or the complete disconnecting of a call. Its purpose is to deliberately cause low-quality voice network performance. These are best practices for minimizing the vast majority of VoIP network attacks:.
Encryption of voice packets and signaling — The application of an encryption algorithm on all voice packets and SIP signaling packets is a best practice that should be observed by all VoIP professionals. The most powerful encryption algorithms available today include the Advanced Encryption Standard using key sizes of bits. Such encryption will mitigate against eavesdropping as well as identity and service theft.
Encryption is a service that SIP trunk providers often apply to voice packets, but less often on the SIP signaling packets.
Conventional IP network security — For the most part, measures that are considered best practices for mitigating the risks inherent to IP networks are sufficient for protecting a VoIP network. These security measures will reduce call tampering as well as unauthorized access into VoIP systems and devices.
Our article on how to keep your SIP phone system safe has more details on how to mitigate specific types of risks, including DDoS attacks, packet sniffing, data extrusion and malware. Physical security — Physical security is just as important for modern VoIP networks as it was for traditional telephony networks. Although remote attacks are more common on VoIP networks, lax physical restrictions to telecom closets can still result in VoIP network compromise.
For more details on how to beef up the physical security of your network, see Five steps for securing your SIP telephone system , as well as our article on securing your wireless network. Securing specific elements of a voice network. There are specific steps that you can take to secure different parts of your voice network. IP Phones — The IP phones themselves should be protected from physical access to avoid unauthorized calls being made, especially during off hours.
Additional security can be added using authorization codes that must be dialed before each toll or international call or even a general security lockout code that will make the phone inoperable until a PIN has been entered.
Additional network-level security that can be implemented includes encryption of voice packets to and from the IP phone, segregation of voice on a separate voice VLAN, and the regular updating of phone firmware to resolve any security holes that may have been discovered. The usual best practices employed for these servers, such as antivirus, software firewalls, malware protection and regular backups of vital data, are ordinarily sufficient to provide the required security for IP PBXs.
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When your data is anonymised or deleted, you will receive an email confirmation. This is done in order to personalise and enhance your experience with us. By using this form you agree with the storage and handling of your data by this website. Secure Your Router A secure home network always starts with a secure router.
Here are a few steps you should take to secure your router: Update your firmware: Your router requires firmware to function, but over time, that firmware could develop vulnerabilities for fail to stand up against incoming threats. Install Security Tools Home network security products come in a variety of shapes, sizes and styles.
Here are a few network-related cyber hygiene practices that you need to adopt today: Avoid messages from unknown senders, especially if they contain links or attachments. Stay away from risky websites and never download from a third-party site. Do not share your router login credentials with anyone, and be sparing with whom you share your wireless network login information.
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