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NCM supported encryption protocols for SSH

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Created by Interspire Import, last modified by MindTouch on Jun 23, 2016

Views: 1,948 Votes: 5 Revisions: 10

Overview

This article provides information on encryption protocols for SSH supported by NCM.

Environment

All NCM versions

Detail

NCM supports the following encryption protocols for SSH:

  • DES
  • 3DES (TripleDES)
  • AES
  • BLOWFISH
  • AES128
  • AES192
  • AES256
  • CAST128


While negotiating connection with device that NCM is attempting to use encryption algorithms for: 

  • SSH1

    NCM tries to negotiate the TripleDES algorithm first. If that fails, NCM tries Blowfish. If Blowfish is not available (on the remote server), NCM  falls-back to DES.
     
  • SSH2

    NCM tries to negotiate an AES algorithm first (any type). If that fails, NCM tries TripleDES. If TripleDES is not available, NCM tries Blowfish. If Blowfish fails, NCM drops the connection instead of trying DES, which most (new) servers don't support because of its poor security.
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