SFTP Connection Guide

This guide walks you through everything you need to securely connect to Healthfuse’s SFTP server — from generating your SSH key to troubleshooting common issues. Follow the steps in order if you’re setting up for the first time, or jump to the relevant section if you’re resolving a specific issue.
01

Generate an SSH Key

Supported Key Types

RSA (4096-bit minimum)
Widely supported and secure.
ECDSA (NIST P-256 / P-384 / P-521)
Strong security with smaller key sizes.
EdDSA (Ed25519)
Efficient and highly secure. Verify client compatibility.

Generate Your SSH Key

Windows (PuTTYgen)
  1. Open PuTTYgen and select your key type (RSA, ECDSA, or Ed25519).
  2. For RSA, set Number of bits to 4096.
  3. Click Generate and move your mouse to add randomness.
  4. Save the private key securely and copy the public key for submission.
OpenSSH (macOS / Linux / Windows WSL)

Adjust the path to where you want to store keys (e.g., ~/.ssh/healthfuse_sftp).

# RSA 4096
ssh-keygen -t rsa -b 4096 -f ~/PATH/TO/KEY/healthfuse_sftp

# ECDSA (P-256)
ssh-keygen -t ecdsa -b 256 -f ~/PATH/TO/KEY/healthfuse_sftp

# Ed25519
ssh-keygen -t ed25519 -f ~/PATH/TO/KEY/healthfuse_sftp

# Secure private key
chmod 644 ~/PATH/TO/KEY/healthfuse_sftp

# Copy public key for submission
cat ~/PATH/TO/KEY/healthfuse_sftp.pub
Submit Your Public Key: Email your public key to Support@healthfuse.com for integration. NEVER send your private key.
02

Connect to the SFTP Server

Client Settings (FileZilla Example)

SettingValue
ProtocolSFTP – SSH File Transfer Protocol
Hostsftp.healthfuse.com
Port22
Logon TypeKey file
UserProvided by Healthfuse

Add your private key file in FileZilla under Edit → Settings → SFTP.

Accepted Algorithms & Fingerprints

MAC Algorithms

  • hmac-sha2-256-etm@openssh.com
  • hmac-sha2-256
  • hmac-sha2-512-etm@openssh.com
  • hmac-sha2-512

Encryption Algorithms

  • aes128-ctr, aes192-ctr, aes256-ctr
  • aes128-gcm@openssh.com
  • aes256-gcm@openssh.com
  • chacha20-poly1305@openssh.com

Key Exchange Algorithms

  • diffie-hellman-group14-sha256
  • diffie-hellman-group16-sha512
  • diffie-hellman-group-exchange-sha256
  • ecdh-sha2-nistp256 / p384 / p521
  • curve25519-sha256@libssh.org

Key Algorithms

  • rsa-sha2-256, rsa-sha2-512
  • ecdsa-sha2-nistp256 / p384 / p521
  • ssh-ed25519

Server Fingerprints (SHA256)

Key TypeSHA256 Fingerprint
ECDSASHA256:hBdIAK9LPDUcrcGeQrpczdy6tWSiL2G7k0QFobf4Sx8
RSASHA256:rkZbAg7R8mW/M9hwBY4pT/Esqos7FsW+kFOnWi/4QwM
Ed25519SHA256:CUekvSpaUVYxhM7km1Iwpckov44iAFC5wv3xHUuabcg
On first connection, verify the presented fingerprint matches one of the above.
03

Troubleshooting & Common Issues

SFTP: Can't Connect

  1. Ensure your private key file is present and readable locally.
  2. In FileZilla, open Edit → Settings → SFTP and add your private key file.
  3. Confirm: Host sftp.healthfuse.com · Port 22 · Protocol SFTP · Logon Type Key file
  4. If it still fails, screenshot the error and send to Support@healthfuse.com.

SFTP: Can't Delete or Rename Files

For compliance reasons, users cannot delete or rename files on the SFTP server. To request file removal, contact Support@healthfuse.com.

General Errors: What to Include

When contacting support, please provide the following for fastest resolution:

  • Exact error message text and/or a screenshot
  • Approximate time the error occurred
  • Steps taken immediately before the error
  • Which client you're using (e.g., FileZilla + version)
04

Security & Best Practices

Key Management

  • Store your private key securely and never share it.
  • Ensure your client or automation tool supports your chosen key type and algorithms.

Data Encryption Standards

All transfers use SFTP with built-in encryption. Data at rest is secured with AES-256.

PGP / Additional Options

If you have specific encryption requirements beyond SFTP, contact Support@healthfuse.com to discuss alternatives.

05

Getting Additional Help

Still stuck? Email Support@healthfuse.com and include the following for fastest resolution:

  • Error text or screenshot
  • Time of issue
  • Client and version (e.g., FileZilla 3.x)

Last updated: v2026-05-04

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