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.

NSX SFTP Backup stops working after upgrade to NSX 6.3.*
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Wojciech Marusiak
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Wojciech Marusiak

Solution Architect at Alibaba Cloud
I am innovative and experienced IT professional with over 12 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 IT community and I received VMware vExpert 2014 - 2017 and VMware vExpert NSX 2017 Award.

My blog wojcieh.net - was voted #43 in Top vBlog 2017 contest!

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Wojciech Marusiak
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