VPN vs SDP vs ZTNA: Which is the Best Security Solution?

With the emergence of cloud-based applications and remote work, the frequency of advanced cyber attacks increased. It makes it necessary to protect your sensitive data and internal networks from advanced vulnerabilities. 

It gave birth to several advanced security solutions, including Virtual Private Networks (VPNs), Software-Defined Perimeters (SDP) and Zero Trust Network Access (ZTNA). 

However, each solution works differently to secure network access, but which is the best choice? 

To explore this, read this article and learn the pros and cons of VPNs, SDPs, and ZTNAs and see their differences in implementing the right security solutions for your business.

Virtual Private Networks (VPNs)

VPNs provide secure remote access to private networks over the internet. 

It creates an encrypted tunnel between the user’s device and the corporate network, protecting transmitted data from potential threats. 

Pros:

• Widely available and easy to implement.
• Versatile and compatible with various devices and operating systems.
• Encrypts data for secure transmission.
• Suitable for smaller organisations with straightforward security needs.

Cons:

• “All-or-nothing” access may lead to potential vulnerabilities.
• Managing VPNs at scale can be challenging.
• Performance may suffer due to increased traffic.

Software-Defined Perimeters (SDP)

SDP i.e. Software- defined perimeter, also known as “Black Cloud”. It is a relatively newer security model which hides the Internet-connected infrastructure (servers, routers, etc.) from external parties and attackers. 

Through this, they cannot see whether it is hosted on-premise or in the cloud, which reduces the surface of the attack.

Pros:

• Granular access control based on user identity and context.
• Reduces the risk of lateral movement within the network
• Suitable for organisations prioritising application-centric security.

Cons:

• Complex implementation
• Integration with existing infrastructure may require significant effort.
• May not be ideal for companies with limited resources.

Zero Trust Network Access (ZTNA)

ZTNA is a  holistic and adaptive approach to secure network access, which operates on the principle of “never trust, always verify.” It means continuously verifying users and devices before granting access to specific resources. 

Zero Trust Network solutions use various authentication factors and continuous monitoring to ensure that only legitimate users will get access.

Pros:

• Supports secure access to resources regardless of location.
• Eliminates the need for physical presence on the corporate network.
• Suitable for dynamic work environments with remote access requirements.

Cons:

• Requires changes to the organisation’s security infrastructure.
• Implementing ZTNA might involve replacing or integrating existing security solutions.

Comparison: VPN, SDP, ZTNA

1. VPN vs ZTNA

2. VPN vs SDP

3. ZTNA vs VPN

Final Thoughts: What to Choose?

The decision to choose the best security solution among VPNs, SDPs, and ZTNAs, in the end, depends on the requirement of an organisation. 

VPNs are reliable and suitable for small to medium-sized businesses. SDPs provide a more granular and application-focused approach, ideal for individuals seeking enhanced access control. ZTNAs are well-suited for larger enterprises that prioritise scalability and secure remote access. 

Ultimately, every solution has its pros and cons. Thus, considering your existing infrastructure and future scalability, choose the appropriate solution and the right provider, like Instasafe, to protect your valuable assets from evolving threats.