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Enable password

As explained in Acing the CCNA Exam: Volume 2 Advanced Networking and Security

An enable password is a Cisco IOS credential for entering privileged EXEC mode that may be stored in cleartext or weakly encrypted form.

An enable password is a Cisco IOS credential for entering privileged EXEC mode. The enable password command stores it as a type 0 cleartext value, which is unacceptable for security. section 11.3.1

Password-storage behavior distinguishes the available configurations:

  • enable password password creates a type 0 cleartext password. section 11.3.1
  • service password-encryption changes it to type 7 reversible encryption, which remains weak and easily decrypted. section 11.3.1
  • Use enable secret instead; it stores a one-way hash, with the algorithm depending on the device model and IOS version. section 11.3.1

Preferred replacement

Configure a hashed privileged password with enable algorithm-type scrypt secret CiscoCCNA. The running configuration displays enable secret 9 followed by the scrypt hash.

How Acing the CCNA Exam: Volume 2 Advanced Networking and Security covers it

How deep it goes
Defines cleartext, reversible encryption, and hashing, then contrasts enable password with enable secret without detailing authentication internals.
Examples
Uses enable password, service password-encryption, and enable algorithm-type scrypt secret commands with running-configuration output.
What it assumes
Assumes Cisco IOS command-line familiarity while defining hashing and encryption distinctions explicitly.
What you can do after
Configure or evaluate Cisco IOS privileged passwords by recognizing type 0, type 7, and hashed alternatives.
How it connects
Connects enable password with enable secret, service password-encryption, password hashing, encryption, and user accounts.

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Related concepts

This explainer was generated by Manning's knowledge graph from the text of Acing the CCNA Exam: Volume 2 Advanced Networking and Security. The section links point to the parts of the book it draws on.