What is Syncplify R2FS!?

Syncplify R2FS! (Remote-Reverse File System) is an optional component of Syncplify Server! designed to securely expose internal storage to your SFTP transfer server without opening inbound network access.

The Core Idea

Traditional architectures require the server in the DMZ to initiate inbound connections toward backend storage. R2FS! inverts this model: the storage side initiates and maintains an outbound, secure connection to the server.
This “reverse” approach dramatically reduces the attack surface and simplifies firewall rules.

How It Fits In

R2FS! integrates with the Virtual File System (VFS) of Syncplify Server!. To users accessing Syncplify Server! via its protocol-handlers (SFTP, FTPS, HTTPS), remote storage appears as a normal file-system path, even though it physically resides in a protected network.

Why It Matters

• No inbound firewall ports required toward internal storage (subnet)
• Strong authentication using mutual TLS and or PSK
• Clear network separation between DMZ and private/subnet infrastructure
• Compliance-friendly design for regulated and highly-regulated environments
• Scales naturally, supporting multiple R2FS! nodes and high-availability setups

Typical Use Case

An organization runs Syncplify Server! in a DMZ, while file data remains on internal systems in a separate and isolated subnet. R2FS! allows secure access to that data without exposing the internal network nor relaxing firewall policies.

In Short

Syncplify R2FS! provides a secure, modern way to bridge DMZ-hosted file transfer services with internal storage by reversing the direction of trust and connectivity.