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Configuring SMB over QUIC in Windows Server 2025

SMB over QUIC in Windows Server 2025 combines the robust Server Message Block (SMB) protocol with the modern QUIC transport protocol to deliver secure, low-latency, and reliable file sharing. This integration eliminates the need for VPNs, enhances encryption with TLS 1.3, and optimizes performance for remote and mobile users. Key benefits include faster data transfers, improved network reliability, and simplified deployment. Security is strengthened through PKI, AES encryption, and mutual authentication, while administrators can configure and automate settings using familiar tools like Group Policy and PowerShell.

SMBQUICTLS 1.3PKIAES Encryption

~2 min read • Updated Dec 20, 2025

1. Introduction to SMB over QUIC


SMB is a long-standing protocol for file and printer sharing. QUIC is a modern UDP-based protocol designed for faster, more secure connections. Their integration in Windows Server 2025 enables secure, efficient file sharing without VPNs.


2. Benefits of SMB over QUIC


  • Faster Transfers: UDP reduces connection setup time and latency.
  • Enhanced Security: QUIC’s built-in encryption combined with SMB’s security features.
  • Network Reliability: Multiplexing and congestion control ensure smooth transfers over unstable networks.
  • Better User Experience: Reduced buffering and improved responsiveness.
  • Simplified Deployment: Easy configuration with familiar Windows tools.

3. Security Considerations


SMB over QUIC leverages TLS 1.3 for encrypted communications. PKI validates server and client identities through digital certificates. AES-128/256 encryption secures data both in transit and at rest.


4. Role of PKI


  • Digital Certificates: Verify identities of users, devices, and servers.
  • CA and RA: Manage certificate issuance and validation.
  • Public/Private Keys: Asymmetric encryption ensures confidentiality.
  • CRL and OCSP: Track revoked or expired certificates.

5. Encryption Mechanisms


QUIC provides end-to-end encryption with TLS 1.3, ensuring forward secrecy and authenticated encryption. SMB adds AES-based encryption for file sharing. Together, they form a double-layered security framework. Administrators can automate deployment using Group Policy and PowerShell.


Conclusion


SMB over QUIC in Windows Server 2025 delivers secure, fast, and reliable file sharing. With advanced encryption, reduced latency, and simplified configuration, it provides enterprises with a modern solution for resilient and efficient network communication.


Written & researched by Dr. Shahin Siami

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