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Overview

Renew existing Kerberos tickets to extend their validity period. This command allows you to refresh TGTs before they expire, maintaining persistent access without re-authentication.

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Syntax

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Required Parameters

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ticket
string
required
Base64-encoded ticket data or path to .kirbi file to renew

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Optional Parameters

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dc
string
Domain controller to contact for renewal
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outfile
string
Save renewed ticket to file
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ptt
boolean
Pass-the-ticket (inject renewed ticket)
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autorenew
boolean
Automatically renew ticket until renew-till limit
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nowrap
boolean
Don’t wrap base64 output

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Examples

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Renewal Requirements

Renewable Flag:
  • Ticket must have the renewable flag set
  • Original ticket request must specify renewable option
  • Not all tickets are renewable by default
Validity Period:
  • Tickets can only be renewed within their renew-till time
  • Default domain policy: 7 days renewable period
  • Cannot renew expired tickets

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Use Cases

Long-term Access:
  • Maintain access without re-authentication
  • Extend ticket lifetime for persistent operations
  • Avoid credential re-exposure
Operational Continuity:
  • Keep tickets valid during long engagements
  • Maintain session state across operations
  • Reduce authentication frequency
  • asktgt - Request renewable TGTs
  • ptt - Inject renewed tickets
  • describe - Check ticket renewable status