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For a root, administrator, or control-panel login, use a different randomly generated password for every account, store it in a password manager, and enable multifactor authentication (MFA) where available. Under NIST’s 2025 guidance, a password used alone must be at least 15 characters; one used as part of MFA must be at least eight. The practical target is a long password that the service accepts—not a memorable password reused across systems.
How to generate a strong password for a server or panel
- Check the account’s rules. Consult the provider’s documentation for its maximum length and supported characters. Root consoles and control panels can have different limits; NIST’s recommendations describe how verifiers should behave, not what a particular service accepts.
- Generate a unique password in a password manager. Use its random-password function and choose a length that meets the account’s policy. NIST recommends that verifiers allow at least 64 characters to accommodate passphrases, and says passwords should not be silently truncated. OWASP also recommends allowing password managers and paste. Those are desirable service behaviors, not guarantees about every provider. NIST SP 800-63B-4; OWASP Authentication Cheat Sheet.
- Save it directly to the correct account entry. Store separate credentials for root, each administrator, and each control-panel account. A password manager makes unique passwords practical without requiring you to memorize every one. CISA discusses both cloud-synced and locally maintained vaults: cloud sync can make credentials available across devices, while a local database puts more backup responsibility on you. Neither approach is automatically safer regardless of product and setup. CISA’s cybersecurity essentials; CISA’s password-manager guidance.
- Replace the default credential before deployment. Change factory- or vendor-supplied passwords before exposing a system to users or networks. Disable accounts you do not use, and protect administrative access with MFA where possible. CISA’s cybersecurity essentials; OWASP Top 10:2025, A07 Authentication Failures.
- Test the login and recovery route. Confirm that the new password works, that MFA is configured if supported, and that you can reach the service’s recovery process. Keep recovery information protected rather than leaving it alongside the password in an exposed note.
How long should an admin password be?
NIST SP 800-63B-4, published in 2025, sets a minimum of 15 characters for a password used as a single authentication factor. If the password is used as part of an MFA process, the minimum is eight characters. NIST also says verifiers should allow at least 64 characters. These are guidance requirements for password-verifying services; a particular provider may impose a shorter maximum or other technical constraints, so check its documentation.
Length is more useful than trying to satisfy a checklist of character types. NIST says other composition requirements should not be imposed: prioritize a sufficient length and screening against commonly used or compromised passwords rather than mandatory mixtures of uppercase letters, numbers, and symbols. If the generator offers a choice, use a long random value accepted by the service, rather than shortening it to make a symbol pattern easier to remember. NIST SP 800-63B-4; NIST SP 800-63B-4 Implementation Resources FAQ.
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Random password or passphrase?
Use a generated string for credentials stored in a manager
When you do not need to memorize the server credential, a password manager’s random-password function is convenient: generate a distinct password, save it, and paste it when signing in. The guidance cited here recommends using a manager, but it does not test any specific generator or establish how a particular tool creates randomness or handles secrets. Choose a tool based on its documented design and your backup needs.
Use a long passphrase when you must memorize the secret
A long passphrase made from unrelated words can be easier to recall than a random string. Do not reuse a phrase printed in an article or another public example; NIST warns that its sample phrase is illustrative, not for use as a real password. NIST: How Do I Create a Good Password?.
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Should an admin password include symbols?
Symbols are not a substitute for length, uniqueness, and randomness, and NIST advises against making character-class mixtures a mandatory rule. If the service accepts symbols, a generator may include them, but do not let a symbol requirement force you into a short or predictable password. When a service rejects a generated value, check its documented character rules and generate another value that meets them.
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Enable MFA for root and panel accounts whenever the provider supports it. NIST states that passwords are not phishing-resistant, so adding another factor provides protection that a password alone cannot. A compatible hardware security key can be an option, but availability depends on the account provider; it supplements rather than replaces the password. NIST SP 800-63B-4; NIST: How Do I Create a Good Password?.
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When should you change an administrator password?
Change a vendor-supplied default before use. For an established account, do not change the password on an arbitrary calendar schedule unless the service or your organization requires it. NIST advises against mandatory periodic changes without a user request or evidence of compromise. Change affected credentials promptly if compromise is suspected, and review the account’s activity and recovery settings. NIST SP 800-63B-4 Implementation Resources FAQ; OWASP Authentication Cheat Sheet; OWASP Top 10:2025, A07 Authentication Failures.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.If you operate the service, store password verifiers safely
Generating a strong password is an end-user practice; storing it securely on the service is the operator’s responsibility. Do not store password verifiers as plaintext. OWASP recommends a slow password-hashing approach such as Argon2id, bcrypt, or PBKDF2. OWASP Password Storage Cheat Sheet.
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