I am in a process of upgrading NSX 6.2.4 by a customer in three locations deployed using VVD Deployment Toolkit. The NSX Upgrade itself went really smoothly. However, after the upgrade, we noticed that SFTP backup stopped working with an enigmatic error.

After checking credentials and SFTP backup destination server I found that with NSX 6.3.0 SFTP supports following backup ciphers:

https://docs.vmware.com/en/VMware-NSX-for-vSphere/6.3/rn/releasenotes_nsx_vsphere_630.html

To fix the issue sshd config must be adjusted:

  1. Edit the .
  2. sshd_config keywords Cipher and MACs need to be updated with the correct Cipher and MAC algorithms.For example:
    Ciphers aes128-cbc,aes128-ctr,aes192-cbc,aes192-ctr,aes256-cbc,aes256-ctr
    MACs    hmac-sha2-256

Once config change is done, restart ssh deamon and backup will start to work again.

Social Media

Wojciech Marusiak

Cloud Solution Architect at Microsoft
I am an innovative and experienced IT professional with over 13 years in the IT industry.

My experience and skills have been proven by leading vendor certifications like AWS, Alibaba Cloud, VMware, and Microsoft. I contribute to the IT community and I received VMware vExpert 2014 - 2019, vExpert Pro and VMware vExpert NSX 2017 Award.

My blog wojcieh.net - was voted #76 in Top vBlog 2018 contest!

Do what you love, and you’ll never work another day in your life.
Wojciech Marusiak
Social Media