DINSTAR Singapore - TechBytes

In an era where cyber threats are an ever-looming concern, ensuring the security of Voice over Internet Protocol (VoIP) communications is of paramount importance. This article delves into how DINSTAR, a leading provider of VoIP, PBX, and SBC, employs a range of measures to secure VoIP communications.

Role of Session Border Controller (SBC) in VoIP Security

A Session Border Controller (SBC) is a network element deployed to protect SIP-based voice over Internet Protocol (VoIP) networks. SBCs secure real-time communications at network borders, offering a quality-assured stability and reliability of VoIP and communications services. This becomes even more critical as modern enterprises transition to all-IP networks and digital workplaces, where enterprise communications face new challenges, such as intrusion of services, eavesdropping, denial of service attacks, data interceptions, toll frauds, and SIP malformed packets.

Key Security Features of DINSTAR's SBC

1. DoS/DDoS Attack Protection

DINSTAR's SBC protects against both Denial of Service (DoS) and Distributed Denial of Service (DDoS) attacks. It offers ICMP-Flood, TCP-Flood, and TCP-NULL attack protection, which work by configuring thresholds for ICMP and TCP packets per second. If these thresholds are exceeded, the packets are discarded, providing robust protection against these types of attacks.

2. IP Attack Protection

The IP Attack Protection features include bandwidth limitation, access control, and threshold setting based on the traffic of source IP or local port and SBC’s CPU usage. This proactive security measure helps in fast-positioning of attacks, discovering potential risks, and effectively ensuring that services are not affected by attacks.

3. SIP Attack Protection

DINSTAR's SBC provides SIP Attack Protection that includes SIP registration limiting, SIP call limiting, Telephony Denial of Service (TDoS) attack protection, and SIP malformed packet protection. These measures are designed to protect the core network from SIP-based attacks and abnormal behaviors.

4. TLS/SRTP Encryption

To secure VoIP communications, DINSTAR's SBC uses Transport Layer Security (TLS) for signaling encryption and Secure Real-time Transport Protocol (SRTP) for media encryption. It also supports RADIUS and Tacacs authentication for client/server login, providing an added layer of security.

5. Traffic Control

DINSTAR's SBCs are capable of limiting call traffic of SIP trunks. They sort traffic intelligently according to user level and business priority, and allocate bandwidth via priority, ensuring efficient use of network resources.

6. Overload Protection

DINSTAR's SBCs are designed to deal with high traffic volumes and protect the core network from attacks, ensuring the network's stability even during peak hours or high-traffic events.

7. Dynamic Blacklist/Whitelist

DINSTAR's SBCs support the use of static and dynamic blacklists and whitelists. This allows them to permit or block IP addresses and numbers, providing a flexible and effective way to manage access to the SBCs.

8. IP/Domain Authentication

DINSTAR's SBCs authenticate source SIP calls and registration messages in IP trunks by IP and domain. This helps to avoid toll fraud and malicious attacks, further enhancing the security of VoIP communications.

Conclusion

In summary, DINSTAR's SBCs are equipped with a comprehensive suite of security features designed to protect VoIP communications from various threats. From attack protection and traffic control to encryption and authentication, these features ensure the security, connectivity, and interoperability of VoIP services, helping businesses safely transition to digital workplaces.

Here is a summary of DINSTAR's security features for their VoIP services:

With a comprehensive understanding of these features, businesses can leverage DINSTAR's robust security measures to confidently deploy VoIP communications.