Does it support recent ED25519 keys?

Yes, Ultra Explorer and the rclone engine support modern ED25519 keys as well as RSA in standard OpenSSH format.

What is the difference with FileZilla?

Ultra Explorer shows the server next to your local disks and clouds in two panes with tabs, and can transfer directly between SFTP and a cloud storage.

Protocols & NASSSH encryption / PEM key

SFTP / SSH

Modern SFTP Explorer for Linux Servers, VPS and Cloud Instances

Download Ultra Explorer

Overview of SFTP / SSH Integration

Connect to any server that exposes SFTP over SSH, with a password or an OpenSSH private key. Files open in the dual-pane explorer, next to your local disks and clouds.

Password or private key authentication (RSA, ECDSA, Ed25519)
Custom port and adjustable transfer concurrency
Drag and drop between the server and your local disks or clouds

In-App Configuration Dialog

Capture SFTP / SSH — Ultra Explorer — SFTP configuration in Ultra Explorer: authentication by password or SSH private key with configurable port.

How to connect SFTP / SSH in Ultra Explorer

Select SFTP

Choose SFTP from the Protocols category.
Specify host and user

Enter your server IP address and your username.
Choose authentication method

Enter your SSH password OR provide your private key.
Connect and explore

Click 'Connect and verify' to immediately open the server tree.

Configuration fields

Storage Name

Required

name= Serveur SFTP

Unique identifier for this storage remote in Ultra Explorer (e.g. gdrive-perso, backup-s3).Default value: Serveur SFTP

Server Host / IP

Required

host

Required. Remote hostname, domain name, or IP address of the server.

Username

Optional

user

Port

Optional

port= 22

Optional. Network communication port for the service.Default value: 22

Password

Optional

pass

Password or application password for the account or server.

Private Key PEM (Raw Text)

Optional

key_pem

Optional. Full PEM-encoded private key content (RSA/Ed25519) as raw text.

Private Key Passphrase

Optional

key_file_pass

Optional. Decryption passphrase if your private key is encrypted.

SSH Public Certificate

Optional

pubkey

Optional. SSH public key or certificate if your server enforces certificate-based auth.

Allow Insecure Ciphers

Optional

use_insecure_cipher= false

Optional. Allows negotiation of legacy ciphers and key exchange algorithms on older servers.Default value: false

Disable Remote Hash Check

Optional

disable_hashcheck= false

Optional. Skips remote md5sum/sha1sum commands to speed up transfers.Default value: false

Request Concurrency

Optional Advanced Option

concurrency= 64

Optional (Advanced). Maximum concurrent in-flight requests to saturate high-latency links.Default value: 64

Frequently Asked Questions about SFTP / SSH

Yes, Ultra Explorer and the rclone engine support modern ED25519 keys as well as RSA in standard OpenSSH format.
Ultra Explorer shows the server next to your local disks and clouds in two panes with tabs, and can transfer directly between SFTP and a cloud storage.