This article provides guidance with configuring an SFTP server to work with NSX backups.
Symptoms:
In an NSX for vSphere 6.3.x through 6.3.4 environment, you experience these symptoms:
Connection from x.x.x.x port 45768 on x.x.x.x port 22debug1: Client protocol version 2.0; client software version JSCAPE-2.0debug1: Enabling compatibility mode for protocol 2.0debug1: Local version string SSH-2.0-OpenSSH_6.6.1
no matching mac found: client hmac-sha2-256 server hmac-sha1 [preauth].