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Is It Possible To Access A Switch Without Password Set

foreverlearningforeverlearning Member Posts: 42 ■■■□□□□□□□
Like remote access into a switch when a password has not been set ?

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    JDMurrayJDMurray Admin Posts: 13,026 Admin
    edited May 2023
    GPT-4 sez:

    In Cisco IOS, if no password is set on the VTY lines (which are used for remote access via protocols such as SSH or Telnet), and no login method is specified (like `login` or `login local`), then remote access will be denied by default. This is a security feature designed to prevent unauthorized access.
    In other words, if you don't set a password, you won't be able to access the switch remotely.
    If you try to access it without a password set, you will see a message similar to this:

    Router>telnet 192.168.1.1
    Trying 192.168.1.1 ... Open
    Password required, but none set
    [Connection to 192.168.1.1 closed by foreign host]

    In this case, you would need to access the switch directly through the console port to set a password and enable remote access.
    However, it's important to understand that leaving devices without a password or with a weak password is a major security risk. It's best practice to always set strong, unique passwords on all network devices.

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