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Tag: - Telnet Connection Preamble


When Osirium PAM connects to a device using Telnet, there is no authentication within the protocol itself. Instead the device will prompt for the user to enter a username and a password to authenticate themselves.

This authentication can sometimes be proceeded by a banner or disclaimer type message, and as the shell prompt of the device won't be seen until after authentication has taken place, information is needed by Osirium PAM about these messages and prompts.

Message of the day or banners can also be displayed after logon and before the shell prompt.

This tag has the following attributes:


  • Element Text: (str): This is a regular expression that is used to match any message shown before the username prompt.


Old versions of Cisco IOS devices that are accessible over Telnet have a preamble message of:

   <telnet_preamble>User Access Verification</telnet_preamble>

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