Security is one of the main challenges for companies that adopt Software-Defined Wide Area Network (SD-WAN) technology. SD-WAN allows you to connect different locations in a flexible, efficient and cost-effective way, but it also brings new risks and vulnerabilities. In this article, we are going to address some important aspects of security in an SD-WAN network and how to protect data and applications effectively.
What is SD-WAN?
SD-WAN is a technology that uses software to manage and optimize network traffic between different locations, such as branches, data centers, and clouds. SD-WAN allows you to choose the best path for each type of traffic, according to criteria such as availability, latency, cost, and quality of service. SD-WAN also provides greater visibility and control over the network, making it easier to manage and resolve issues.
What are the benefits of SD-WAN?
SD-WAN brings several benefits to businesses, such as:
- Cost reduction:
SD-WAN allows the use of low-cost connections, such as public internet, instead of expensive dedicated links, such as MPLS (Multiprotocol Label Switching).
- Performance improvement:
SD-WAN allows you to prioritize critical and latency-sensitive traffic, such as voice and video, ensuring a better experience for end users.
- Greater agility:
SD-WAN allows you to deploy new connections and services quickly and easily, without relying on external providers or complex equipment.
- Greater flexibility:
SD-WAN allows the integration of different types of connections, such as 4G, 5G, Wi-Fi and satellite, adapting to the needs of each location and situation.
What are the security challenges in an SD-WAN network?
SD-WAN also presents some network security challenges, such as:
- Higher exposure:
by using public and unreliable connections, SD-WAN increases the attack surface and the possibility of intercepting, altering, or stealing data.
- Increased complexity:
by connecting different locations and clouds, SD-WAN makes it more difficult to maintain a consistent and up-to-date security policy across the network.
- Higher demand:
when supporting critical and latency-sensitive applications, SD-WAN requires security solutions that don't compromise network performance and quality.
How to ensure security on an SD-WAN network?
To ensure security in an SD-WAN network, certain measures must be taken, such as:
- Encrypt traffic:
it is essential to encrypt traffic between SD-WAN network locations, using protocols such as IPsec (Internet Protocol Security) or TLS (Transport Layer Security), to prevent data from being accessed or modified by third parties.
- Authenticate the devices:
it is important to authenticate the devices that are part of the SD-WAN network, using digital certificates or strong passwords, to prevent unauthorized devices from connecting to the network.
- Segment the network:
it is recommended to segment the network into different domains to isolate sensitive or restricted traffic and limit the impact of a possible attack.
- Monitor the network:
it is necessary to constantly monitor the network, using tools such as SIEM (Security Information and Event Management) or IDS (Intrusion Detection System), to detect anomalies or suspicious activities in the network.
- Update the network:
it is essential to update the network periodically, applying security patches or new versions of the software, to correct vulnerabilities or improve network functionality.
Security in an SD-WAN network is a fundamental topic for companies that want to take advantage of the benefits of this technology without compromising their data and applications. To do this, it is necessary to adopt a comprehensive and integrated security strategy.
